Database Develop

Nexus 7 Very Easy Memory Cooling Modification

I pealed the copper piece of 'heatsink' material over the Processor/GPU and over the two memory chips below and noticed the black thin adhesive is covering the memory chips not the gold 'heatsink' material that should be to cool them properly.
I carefully cut with the x-acto knife the black adhesive revealing the copper heat sink being sure NOT to cut into the copper material. It allowed a 1:1 bond of the heat sink to the memory chips. I could see where the memory chips bonded to the adhesive and just cut around the small black square.
Seems like this small little mod may help in reduction of heat off the memory chips while over clocking or hardcore gaming...
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xboxexpert said:
I pealed the gold piece of 'heatsink' material over the Processor/GPU and over the two memory chips below and noticed the black thin adhesive is covering the memory chips not the gold 'heatsink' material that should be to cool them properly.
I carefully cut with the x-acto knife the black adhesive revealing the gold heat sink being sure NOT to cut into the gold material. It allowed a 1:1 bond of the heat sink to the memory chips. I could see where the memory chips bonded to the adhesive and just cut around the small black square.
Seems like this small little mod may help in reduction of heat off the memory chips while over clocking or hardcore gaming...
Click to expand...
Click to collapse
Are you sure you didn't cut off the thermal paste?

angellsl said:
Are you sure you didn't cut off the thermal paste?
Click to expand...
Click to collapse
I'm pretty sure that's what he did. They make thermal tape sorta stuff, and use it for RAM quite often since RAM doesn't need intense cooling.

I do not recommend this. At the very least you'll piss of some Asus Thermal Design Engineers.

Yea that probably wasn't a good move. I've seen it used on the RAM chips of videcards and other things while I've built computers, what would improve it would be to replace it with some Arctic Silver 5

ThePerson98 said:
I'm pretty sure that's what he did. They make thermal tape sorta stuff, and use it for RAM quite often since RAM doesn't need intense cooling.
Click to expand...
Click to collapse
There is no "Thermal Paste" just adhesive. If you peal yours up you will see that the chipset has no paste on it its just adheased to the top. However the black stuff everyone is freaking out is not thermals paste its a layer to prevent the circuitry from shorting due to the conductivity of the copper material.
As you can see in that picture the thermal pad is what the guy is holding the black tape, THAT I WAS SPEAKING OF, is just a shield for non conductivity yet it covers the memory chips. You all are flipping out and giving this thread 1 star with out understanding exactly how thermal dynamics work and what I was talking about. Also I've been liquid-cooling devices and building machines for over 10 years you really think I would have done a mod that increased heat....come on gimme some credit

xboxexpert said:
There is no "Thermal Paste" just adhesive. If you peal yours up you will see that the chipset has no paste on it its just adheased to the top. However the black stuff everyone is freaking out is not thermals paste its a layer to prevent the circuitry from shorting due to the conductivity of the copper material.
As you can see in that picture the thermal pad is what the guy is holding the black tape, THAT I WAS SPEAKING OF, is just a shield for non conductivity yet it covers the memory chips. You all are flipping out and giving this thread 1 star with out understanding exactly how thermal dynamics work and what I was talking about. Also I've been liquid-cooling devices and building machines for over 10 years you really think I would have done a mod that increased heat....come on gimme some credit
Click to expand...
Click to collapse
Cool idea, have you monitored your temps before and after to see if it helped at all?

myke66 said:
Cool idea, have you monitored your temps before and after to see if it helped at all?
Click to expand...
Click to collapse
I have not. It was sorta a spur of the moment noticeable modification. I'm 100% certain it didn't hurt anything though as many have mentioned. I wouldn't have hurt my precious tablet I love this thing.

Hi
xboxexpert said:
I have not. It was sorta a spur of the moment noticeable modification. I'm 100% certain it didn't hurt anything though as many have mentioned. I wouldn't have hurt my precious tablet I love this thing.
Click to expand...
Click to collapse
I doubt the memory barely gets warm over clocking or not. Memory can run at quite high temperatures, certainly hotter than hand hot so you would know if there was a heat problem.
Regards
Phil

PhilipL said:
Hi
I doubt the memory barely gets warm over clocking or not. Memory can run at quite high temperatures, certainly hotter than hand hot so you would know if there was a heat problem.
Regards
Phil
Click to expand...
Click to collapse
Agreed...

xboxexpert said:
However the black stuff everyone is freaking out is not thermals paste its a layer to prevent the circuitry from shorting due to the conductivity of the copper material.
As you can see in that picture the thermal pad is what the guy is holding the black tape, THAT I WAS SPEAKING OF, is just a shield for non conductivity yet it covers the memory chips. You all are flipping out and giving this thread 1 star with out understanding exactly how thermal dynamics work and what I was talking about. Also I've been liquid-cooling devices and building machines for over 10 years you really think I would have done a mod that increased heat....come on gimme some credit
Click to expand...
Click to collapse
...wrong. It isnt a "shield for non (electrical) conductivity", although it does that. Instead of using a paste in certain applications, OEMs will use something closer to a pad/thermal tape. It is slightly worse than using a paste, but it works ten fold better than using nothing like you are saying. The point of using a paste or pad/tape is to fill in the pores of the heatsink and whatever it is cooling providing a larger connected surface. Just removing the pad will lead to worse heat conductivity. It is much better to keep the pad on there, but if you are really wanting to do this please put something like arctic silver 5 or even a cheap-er thermal paste in there.
I still recommend leaving the pad there overall, because it wont degrade over a few years like a paste will and this really isn't a high temp application like on a CPU or GPU.

deltantor said:
...wrong. It isnt a "shield for non (electrical) conductivity", although it does that. Instead of using a paste in certain applications, OEMs will use something closer to a pad/thermal tape. It is slightly worse than using a paste, but it works ten fold better than using nothing like you are saying. The point of using a paste or pad/tape is to fill in the pores of the heatsink and whatever it is cooling providing a larger connected surface. Just removing the pad will lead to worse heat conductivity. It is much better to keep the pad on there, but if you are really wanting to do this please put something like arctic silver 5 or even a cheap-er thermal paste in there.
I still recommend leaving the pad there overall, because it wont degrade over a few years like a paste will and this really isn't a high temp application like on a CPU or GPU.
Click to expand...
Click to collapse
After my mod there is adhesive on the actual copper piece so there isn't "nothing" bonding the two materials. See for yourself if you don't fully understand. I totally understand what your saying though.
Also If you put Artic Silver on you are bound to make a full blown mess of things as there is no tension to spread the paste and your basically bonding AS5 with Sticky paste that's already there on the copper.

or use a non conductive paste
http://www.newegg.com/Product/Product.aspx?Item=N82E16835186020

Hi
BrianDigital said:
or use a non conductive paste
http://www.newegg.com/Product/Product.aspx?Item=N82E16835186020
Click to expand...
Click to collapse
The black plastic might also be deliberately design to insulate the other components from the heat sink as the copper screens purpose might be to cool the CPU only. Adding extra heat energy from other components into the copper shield will reduce the effectiveness of cooling the CPU.
If the plastic is to insulate (both electrically and thermally), the other components will simply dissipate their heat via the circuit board copper tracks, moving that heat in an opposite direction to that of the CPU, which when you think about it, makes perfect sense.
It also over looks the fact there are another 2 memory chips sat on the other side.
I think this applies here, "If it ain't broke, don't try to fix it" .
Regards
Phil

Sorry but I don't think ur mod doing any good ...its memory not CPU /GPU like with the old Xbox where u had to scrape off old paste and put Arctic silver 5 to stop red rings lol
Sent from my Nexus 7 using Tapatalk 2

PhilipL said:
Hi
The black plastic might also be deliberately design to insulate the other components from the heat sink as the copper screens purpose might be to cool the CPU only. Adding extra heat energy from other components into the copper shield will reduce the effectiveness of cooling the CPU.
If the plastic is to insulate (both electrically and thermally), the other components will simply dissipate their heat via the circuit board copper tracks, moving that heat in an opposite direction to that of the CPU, which when you think about it, makes perfect sense.
It also over looks the fact there are another 2 memory chips sat on the other side.
I think this applies here, "If it ain't broke, don't try to fix it" .
Regards
Phil
Click to expand...
Click to collapse
I had no plans of doing such a thing. I was hoping to save someone the grief of putting AS5 on the their tablet smush everything together and join components they weren't supposed to.
Sent from my Nexus 7 using Tapatalk 2

The black plastic is thermal tape. Besides bonding the flexible copper sheet to the components, it also serves to evenly transfer heat from the components to the copper sheet. It's not a thermal insulator - it has excellent thermal conductive properties. The adhesive that is left on the components is not going to as effectively couple the chips to the copper.
It's the same stuff that you'll find under the heat sinks of computer memory modules when the heat sinks don't clip on with some force.
As an electrical engineer who designs these sorts of things, my advice is don't remove the thermal adhesive from your Nexus 7. Google put it there for a reason and, on a $200 tablet, they didn't put in anything that didn't need to be there.

sorry to dig up an old thread but i found this http://www.sepa-europe.com/en/news/new-sepa-micro-fans
is there room ? considering current over clocks's would it help?!!

danb79 said:
sorry to dig up an old thread but i found this http://www.sepa-europe.com/en/news/new-sepa-micro-fans
is there room ? considering current over clocks's would it help?!!
Click to expand...
Click to collapse
I think that you might have a tough time slipping a sheet of paper in there. I suppose that an enterprising person could cut some kind of opening for the fan, but then there'd be the problem of no air circulation within the case because of that lack of space. Also, you'd have to find a 3.3V rail to connect to. I hate to be a wet blanket, but I think that any benefit would be so small that it just wouldn't be worth it.

Improve Nexus 4 thermal transfer with thermal pad

Hey guys, I have read many reviews where people complain about overheating and excessive amount of heat from the phone localized in one area. Based on the tear down provided by ifixit, there looks to be no EMI shield over the CPU/memory chip area unless it was removed before the photo was taken. But either way, I see that when assembled there is the metal backing to the LCD directly above it which would really dissipate the heat well.
Why not purchase some thin thermal pads and apply as necessary to transfer the heat to the metal frame directly above it. Even if there is an EMI shield over it, open it up (unless it's soldered making it harder) and put the thin thermal pad in there and on the outside of the shield.
Seems like a very simple solution to fix a pretty big problem. I don't have my hands on a Nexus 4 and am unsure if I will in the future but if I ever do I will definitely try this and provide results and instructions on how to do the same.

Or LG could design the phone better.

johnny13oi said:
Hey guys, I have read many reviews where people complain about overheating and excessive amount of heat from the phone localized in one area. Based on the tear down provided by ifixit, there looks to be no EMI shield over the CPU/memory chip area unless it was removed before the photo was taken. But either way, I see that when assembled there is the metal backing to the LCD directly above it which would really dissipate the heat well.
Why not purchase some thin thermal pads and apply as necessary to transfer the heat to the metal frame directly above it. Even if there is an EMI shield over it, open it up (unless it's soldered making it harder) and put the thin thermal pad in there and on the outside of the shield.
Seems like a very simple solution to fix a pretty big problem. I don't have my hands on a Nexus 4 and am unsure if I will in the future but if I ever do I will definitely try this and provide results and instructions on how to do the same.
Click to expand...
Click to collapse
Is not a bad idea actually, but i'm not too sure if the display will soffer about it
If only had a n4 to test it XD (i have some thermal pad lying around)

Venekor said:
Or LG could design the phone better.
Click to expand...
Click to collapse
This.
Sent from my Nexus 4 using Tapatalk 2

InvalidUsername said:
Venekor said:
Or LG could design the phone better.
Click to expand...
Click to collapse
This.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
We hack phones to try and make them work better on this website, did you know that?

Venekor said:
Or LG could design the phone better.
Click to expand...
Click to collapse
While I agree with you, thermal pads are relatively cheap and the concerns about pressure on the LCD by another poster would be fine as long as you use a thinner thermal pad that doesn't compress too much after application. I have various thickness of thermal pads so as long as you use the correct one to apply just the right amount of pressure I can only see a large benefit from something so simple.
It would require opening the device and I am unsure if there are warranty voiding stickers in the phone. Some people are really happy with the phone and this is the only problem so I am merely just trying to provide a solution to the one problem remaining.

Thermal pads are to conduct heat from one surface (CPU) to another (heatsink). I can't say I agree with using the screen as a heatsink.

johnny13oi said:
While I agree with you, thermal pads are relatively cheap and the concerns about pressure on the LCD by another poster would be fine as long as you use a thinner thermal pad that doesn't compress too much after application. I have various thickness of thermal pads so as long as you use the correct one to apply just the right amount of pressure I can only see a large benefit from something so simple.
It would require opening the device and I am unsure if there are warranty voiding stickers in the phone. Some people are really happy with the phone and this is the only problem so I am merely just trying to provide a solution to the one problem remaining.
Click to expand...
Click to collapse
I wasn't talking of the pressure but the heat that the backplade dissipate, maybe can damage the screen

I doubt it will help,
someone pointed out that the only trigger for thermal throttling is the battery temperature,
http://forum.xda-developers.com/showpost.php?p=34224171&postcount=85

BakaPhoenix said:
I wasn't talking of the pressure but the heat that the backplade dissipate, maybe can damage the screen
Click to expand...
Click to collapse
Yeah, i would guess the space there is to keep the heat from the screen...
If this phone runs hot it is most likely due to the glass acting as an insulator. Is there any venting anywhere? I bet much of the thermal issue could be solved with a well placed vent..
sent via xda premium with nexus 7-Xbox live-loneleppard add me

While I can see concerns about damaging the LCD due to the heat but I imagine heat spread over the entire surface of the phone is much better than localizing a much more intense heat in a smaller area. LCDs can withstand a decent amount of heat and a small arm chip spreading heat over the entire surface of the phone would be very minimal to no effect on the LCD. I can see great potential for damage allowing the heat to be confined to a small area (just the CPU and RAM sitting on each other) with no heat spreader or heat sink.

Well I guess we won't be overclocking this phone anytime time soon. And you know I was really hoping I could finally fry me some bacon strips on my way to work.

johnny13oi said:
While I can see concerns about damaging the LCD due to the heat but I imagine heat spread over the entire surface of the phone is much better than localizing a much more intense heat in a smaller area. LCDs can withstand a decent amount of heat and a small arm chip spreading heat over the entire surface of the phone would be very minimal to no effect on the LCD. I can see great potential for damage allowing the heat to be confined to a small area (just the CPU and RAM sitting on each other) with no heat spreader or heat sink.
Click to expand...
Click to collapse
Air is a very good thermal isolator, i read that many desktop ips lcs have a maximum teamp. of 35/40 C° so if if the cpu heats a lot it can create problems. I don't know how much is the max temp that this ips can withstand tough.

BakaPhoenix said:
Air is a very good thermal isolator, i read that many desktop ips lcs have a maximum teamp. of 35/40 C° so if if the cpu heats a lot it can create problems. I don't know how much is the max temp that this ips can withstand tough.
Click to expand...
Click to collapse
I really think this whole heat thing is a kernel issue at the moment. I remember owning the one x since very 1.26 or was it an earlier one? Either way, the phone would really get VERY hot. After a few updates i barely felt the heat. Maybe when playing games or whatever, all in all the updates solved the issue. I think google will manage to sort it out, i can't imagine them being that stupid.

I guess if you are concerned with the LCD becoming damaged then you could just put the thermal pad on the other side to make the whole motherboard (minus spring contacts) contact the glass back and spread the heat outside including the battery.
And yes air is a very good thermal insulator so all the heat is just getting trapped inside the phone. Gotta use some thermal pads to conduct that heat to a panel exposed to the outside.
These are all just suggestions that I would do if I were to have one in my hands right now.

johnny13oi said:
I guess if you are concerned with the LCD becoming damaged then you could just put the thermal pad on the other side to make the whole motherboard (minus spring contacts) contact the glass back and spread the heat outside including the battery.
And yes air is a very good thermal insulator so all the heat is just getting trapped inside the phone. Gotta use some thermal pads to conduct that heat to a panel exposed to the outside.
These are all just suggestions that I would do if I were to have one in my hands right now.
Click to expand...
Click to collapse
The bottom line is if the SOC or N4 design is flawed internally which created thermal throttling, then there won't be much help for inserting thermal pads. I have tried this with HD2 when it had thermal runaway. There was a huge thread figuring out how to cure it by many methods as far as putting the motherboard in the oven to melt the soldering at exact time and temperature. The thermal pads method only decreased a few Fahrenheit which wasn't enough to cure if there was a thermal problems. My HD2's SOC was made by Qualcomm. Something definitely don't add up with bad benchmarks scores, thermal problems. Could future updates cure this? Only time can tell.

I've done something similar with my OCed Samsung i9000, but instead of using thermal pads, I used thermal paste. Similar to the Nexus 4 the cpu IC is sandwiched between the PCB and the metal chassis. The metal chassis becomes a massive heatsink for the CPU which dropped my CPU temp. by 10oC (~17oF) at maximum load.
After 9 months of use there hasn't been any damage or deterioration of the display screen (AMOLED).
Details can be found in the i9000 forum.
http://forum.xda-developers.com/showthread.php?t=1605517
When I receive my Nexus 4 I plan to do something similar.

The only problem i can see with this method is warranty. I'm 100% sure that even if there is no warranty void stickers on the screws they won't accept to fix a phone that has been tinkered with
And try to wipe thermal paste without leaving any trace you will fail

Capt.PP said:
The bottom line is if the SOC or N4 design is flawed internally which created thermal throttling, then there won't be much help for inserting thermal pads.
Click to expand...
Click to collapse
It is not flawed as such, it is just overdimensioned.
In essence it is a double APQ8060A + quicker (more power hungry) GPU + additional management circuitry. So it should not surprise, that under full load (benchmarks) it burns through more than double of the usual dual core Krait phone power. While having similar dimensions/power dissipation capacity.
In their marketing Qualcomm positioned this SoC for Tablets. Now you have it in the phone. Is it bad? Not really, full power quadcore tasks is not a realistic task for a phone. And for a second or two (after this it does not matter anymore since your phone "lags") the existing cooling is perfectly adequate.
One thing where Qualcomm/LG/Google could do better are the GPU drivers. Which currently seem badly tuned.

LG Optimus 4X HD P880 Cooling Mod *Update*

As you already aware, there is a throttling problem with this phone. Really killing its potential.
I blame nvidia for making this chip 40nm and LG, not making a proper desing to dissipate the heat released by the SoC.
At default state, P880 behaves like a 100m sprinter. Fast at start, out of breath after the finish. That "finish" depends on the workload of the device and ambient temperature.
At very demanding games I can usually play about 10-15 minutes before serious lag.
This is not all off it.
Because of restrictive governor policies, some games that run smoothly on two core devices, runs like crap on this device. Default governor disables all but one core when there is load on graphics part. I assume this is also because of the attempt to prevent overheating.
So, the device is not running as advertised. This is my thought.
It seems, without serious underclocking and undervolting, one can not get a smooth experience from this device.
With the end of my warranty, I've started modifying the device. My aim is to keep the phone under heavy load with the highest speed as long as possible.
Before hardware level modification, I've rooted and BL unlocked the P880, thanks to great members of XDA.
I'm currently on stable version of CM 10.1.3. Stock kernel.
From what I've read and comfirm with my own experiments, there are two temp limits triggering the throttling. One is the battery, which is 43°C. Other one is the core or the SoC which is 71°C.
With these limiters, device is reaching its lowest speed of 475Mhz under 10 minutes @ 20-ish degrees celsius room temp. I use stability test v2.7 for achieving this. Under real life circumstances, e.g, games, this time differs between 10 to 20mins.
There is a warning on the battery. Says 40°C max. Isn't that too low for this kind of device? With the help of this software I can increase "temp_throttle_skin" value easily to 50°C. http://forum.xda-developers.com/showthread.php?t=2306980
With more headroom on the battery side, P880 drops no more to 475mhz up to 20 minutes of stress testing with Stability Test 2.7.
https://play.google.com/store/apps/details?id=com.into.stability
At 20th minute, battery was 45.5°C. 4 cores running @ 1000Mhz. Core varies between 67-71°C.
After a small mod of applying some Gelid GC-Extreme thermal compound over the metal piece installed on the SoC, I've got slightly better results.
At 20th minute with Stability test 2.7, classic mode, battery increased to 47.5°C , 4 cores stayed at 1200Mhz and never dropped to 1000 but still hitting 70°C. There is slightly better heat spread over the device.
SoC is not touching the main frame directly. Different from nexus 4, there is a small metal shield covering the Soc and memory. (Strange thing is, metal shielding has a hole over the memory part. There is a thermal sticker on that chip.) Only a small part of the metal shield is touching to the main frame. That is a weird material I've never seen before. Its surface looks like sponge but very hard to touch. Like sand paper. I applied the thermal paste on this material in hopes of filling the small gaps and achieving a better surface but it doesn't help so much. I think that rough surfaced material is not ideal to be there in the beginning.
I think, cutting some parts of that shield piece and placing thicker cu or alu sheet metal will be better approach.
I'm also planning to wait for some time for thermal paste to cure. From my experience with this same compound on the PC parts, it takes some time for best results.
All suggestions are welcome.
I also wonder what's your solutions for this throttling matter.
Here are the pics.
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--UPDATE--
First, I want to say thanks to everyone who has send a reply to this post.
I'm back with more modifications and updates.
I wasn't satisfied with my previous modifications which was a simple thermal compound addition.
A proper test can not be done with lack of a custom kernel which has advanced software adjustment possibilities and of course a tool to make the adjustments.
Now I'm on CM 10.1.3 Stable with WerewolfJB kernel v009 [04-29-2014]. Making the speed adjustments with Trickster MOD app. https://play.google.com/store/apps/details?id=com.bigeyes0x0.trickstermod
As for the modification, my first approach was replacing the thermal sticker with a copper plate.
Disassembling the P880 second time.
Notice the touch points of the mainframe.
The metal piece covering the SoC area and thermal sticker removed.
This metal piece between the main frame and SoC is an EMI shield and a heat medium which delays the heat transfer to the mainframe. If you attach the SoC directly to the mainframe, it makes better SoC cooling but battery gets very hot in return. This will eventually make the battery die quickly because heat is the number one enemy of the batteries.
If I could improve the heat transfer from SoC to both the mainframe and metal shielding piece, that might improve the cooling efficiency. That was what I wanted to find out before beginning to mod.
The thinnest copper piece I could find is 0.8mm thick.
0.8mm is too thick for a device which has 8.9mm overall thickness!
I was able to reassembly the device but that put a lot of stress both to the mainframe which has LCD on it and of course the fragile, over engineered, tightly packed PCB of the device. This was a bad idea.
I couldn't find thinner copper plates. At least this small amount.
Final solution came from an old slider style switch which has copper strips touching on each other. I 've found it laying around so destroyed it to get some copper strips, thin enough to use. After cutting to proper size, I've dealt with the corrosion first.
They are 0.35mm thick. I think this is the maximum that can be used without serious concerns.
I've applied thermal paste to both sides of the strips, cut the thermal sticker in half and put the thick part back on to the memory chip. This is the final design before reassembling the device.
I've prepared a test video. 20 minute stress run.
https://vimeo.com/97050916
My settings are stock. 1500mhz max speed with interactive governor.
This is the most torturing test. CPU+GPU test with gaming governor is nothing compared to 4 core stress test.

KSH2014 said:
snip
Click to expand...
Click to collapse
you could disable the thermal throttling via an app (there is one in themes and apps section)
tegra overclock has the ability to disable (or change) temp throttling, and some of the kernels have removed throttling completely (atleast battery temp throttling, the one at 43 degrees)

Flying_Bear said:
you could disable the thermal throttling via an app (there is one in themes and apps section)
tegra overclock has the ability to disable (or change) temp throttling, and some of the kernels have removed throttling completely (atleast battery temp throttling, the one at 43 degrees)
Click to expand...
Click to collapse
Wouldn't that be dangerous? Removing the limiters completely?
Nvidia tegra 3 SoC limit is 85°C. LG adjusted this to 71°C. Maybe this is because of some other parts may be affected with such a high temp. All components are very tightly packed there you know.
Completely removing the limit not seems logical to me.
Operation within or close to the original limits should be achieved.
This could be done with undervolt/underclocking like many of the others did. But I want to get the most out of the available mass of the device as a heat sink.

KSH2014 said:
Wouldn't that be dangerous? Removing the limiters completely?
Nvidia tegra 3 SoC limit is 85°C. LG adjusted this to 71°C. Maybe this is because of some other parts may be affected with such a high temp. All components are very tightly packed there you know.
Completely removing the limit not seems logical to me.
Operation within or close to the original limits should be achieved.
This could be done with undervolt/underclocking like many of the others did. But I want to get the most out of the available mass of the device as a heat sink.
Click to expand...
Click to collapse
you could leave temperature for shutdown. on 10a version of our software, LG had put 120c as temperature of shutdown (atleast that's what some people claimed, my device came with 10d), so having shutdown temp at 85 or 90 is safe (plus, i only hit this limit once, and that was with werewolf kernel which seems to have very high mpu voltage tables)
however i think throttling is useless - if you hit too high temperature, auto-shutdown will take care of any potential problem

I'll try t buy a little fan and connect it to 2 1.5 V batteries and stick it with sth... or ill buy another back cover and make a hole and stick this fan to it

gerciolisz said:
I'll try t buy a little fan and connect it to 2 1.5 V batteries and stick it with sth... or ill buy another back cover and make a hole and stick this fan to it
Click to expand...
Click to collapse
Why not?
If applied correctly, that may be the COOLEST solution.
Now imagine if someone takes this:
mugen-power-4400mah-extended-battery-for-lg-optimus-4x-hd-p880-with-battery-door (google it)
There is enough room between the camera and battery for this:
sunonusa.com/pdf/mm_fan_catalog.pdf(google it)
Take the blower one. Drill a hole and a side opening to the back cover. Add a thin micro switch. Something like you use with the tip of your nail.
So you only switch it on while you playing and not in your pocket.
Voltage is nearly perfect for direct feed with internal battery. A little resistance could be used. Power connection can be done with thin terminals placed between battery contacts.
No further heat sink modification may be needed. Because, simcard and sd card holders get really hot when CPU is hot. Cooling that part with such a method may be sufficient to drop the temps a little bit.
Feasible? Considering the price, effort and patience... Maybe not. But imagination is always good.
@Flying_Bear
I'll also look into that auto shut down idea. Thanks!

All chips can take up to 250 °C for short time. They are soldered on that temp. So don't worry.
Sent from my LG-P880 using Tapatalk

KSH2014 said:
Wouldn't that be dangerous? Removing the limiters completely?
Nvidia tegra 3 SoC limit is 85°C. LG adjusted this to 71°C. Maybe this is because of some other parts may be affected with such a high temp. All components are very tightly packed there you know.
Completely removing the limit not seems logical to me.
Operation within or close to the original limits should be achieved.
This could be done with undervolt/underclocking like many of the others did. But I want to get the most out of the available mass of the device as a heat sink.
Click to expand...
Click to collapse
I've reached like 95 C after changing throttle temps using tegra overclock app and overclocking (GPU [email protected], CPU [email protected]) with no undervolts.
It screwed my LCD up for about 30 minutes.Since then I'm using 85 C as CPU throttle temp and 50 C for battery and I faced no problems so far.So there is no point in keeping throttle temp at 71 C.I barely hit 80 C after undervolting anyway.
I'm pretty sure LG did this to keep the battery from runing out, not because it would actually damage any components.

+ New updates and a test video added to the original post.

[GUIDE]Homemade heatsink[GPS FIXED](Really easy to make)

So I was using my friend's Iphone 5 today.I did some heavy gaming and his phone was transfering heat to all areas of the phone equally, making the chipset get rid of heat easily.If you played some games with 4x hd you'll notice only a part of it gets hot, the part below LG logo at back cover.
So I thought 'why not' and tried to transfer heat equally around the back cover.Had a simple but 'can be effective' idea.Surprisingly this worked greatly and I could feel the heat even at the sides of the phone.
So here is what I did:
{
"lightbox_close": "Close",
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The image pretty much describes it.I used aluminum foil to direct the heat from hot areas to cooler areas.While it sounds too easy it works like magic.
Note that I cut off the connection between the top and bottom aluminum foil so that chipset wouldn't heat the battery up.
(işlemci sıcaklığı = CPU temp and pil sıcaklığı = battery temp.)
No matter what I've done I couldn't get the cpu temperature to go above 60 until I did an antutu stability test and it was around 65 C in the end of the testing and quickly descended to 50 in a matter of seconds.
This screenshot was taken when I had a download of 4~ gb size and phone was just plugged off from charger (all this heats up the battery) so expect battery temperature lower than 40 C in normal usage. (37 ish in my case)
FAQ
Any side effects?
GPS
Did my own tests and while it does not block the signal completly, it weakens them...
With this new method there are no side effects, gps works as perfectly as it would normally and any "possible" (no one reported it so far) cell signal problems are solved aswell.
GPS signal without foil : http://puu.sh/dvF9z/102fc62ba1.png
GPS signal with foil : http://puu.sh/dvF9c/aff68118e3.png
I have toggled gps on/off in both tests before begining the test.
Note that satellites are never stable in my city (signal quality changes per 5 - 10 seconds in both cases due this) so the foil doesn't actually boost your gps signal, screenshots are to show that they both give the same signal quality.
Won't this make my sdcard/battery/SIM card unswapable?
You can still swap battery easily if you ease off with tapes.You'll still be able to swap your battery, microSD and sim card exactly the same way you do now, ONLY if you clothe just the back cover and not the phone as this new method requires sim and microSD slots to be covered tightly.Guide to back cover is under 4th step
But what do I gain from it?
1_)It will increase your battery life.How much depends on how you use your phone.If you put heavy load on it regularly this'll help a lot.If you don't use it long enough to even heat the chipset up it's help won't be noticeable.But even browsing the web gets this phone hot so...
2_)You'll get better performance from your phone : Hot CPU gives less performance compared to a well cooled CPU.Mainly due to throttling*.
*This may or may not prevent throttling on stock ROM as LG has stupidly put a tablet chipset into a phone with only throttling as a temperature adjuster.But I can guarantee no throttling on custom kernels with no overclock.
3_)You will be able to play games without your battery getting drain ridiculously fast.This is mainly due to battery heating up as chipset drains power from it/chipset's heat affecting battery and this will reduce this effect by reducing heat of both.
4_)Extends your phone's life.It is known that running electrical components under high temperature reduces it's lifespans.Battery in particular gets damaged over time, reducing it's capacity and eventually dying off.
5_)You can overclock your phone further as maximum temperature your chipset gets to is reduced enough to overclock it by a bit.
6_)Your chipset will barely heat up to the point of hurting your hands.
How to do it?
You need: 1_) A scissors 2_) An adhesive tape and 3_) A piece of aliminium foil a little longer than your phone (about 3-4 cms longer)
If you adjusted the size by comparing it with screen, you might want to cut the edges of aliminium foil by a bit since back side of the phone has a smaller area than the screen. (do this at step 2)
1_) Shut down your phone (incase battery falls off)
2_) Cut the foil you have to two pieces, one will cover the battery and the other one will cover the chipset AND you'll connect those two aluminum pieces together later on so make the bottom (battery) piece bigger than it should be.
Now you might think this would heat the battery up but our battery has environmental protection and it actually gets hot via the heat transfared through the circuits from chipset to battery.
3_) Make sure you make gaps in the foil for ;
a_)Camera & LED : See how I covered all around them with foil? I just added 2 pieces to cover the top right edges.Don't trouble yourself trying to make gaps for them on the whole foil, use shortcuts.
b_)NFC
c_) GPS ANTENNA : See how in the picture there is a red highlighted spot, half covered with foil and the other half naked? This makes your GPS work.Also the naked part next to it lets your GPS work, so do this part exactly the same as in the picture, if you didn't then don't complain your GPS is not working.Keep the top piece of the square as naked as you can, otherwise the foil may block the signal (in the picture I cut it off like a triangle)
Note : The foil must cover that square even if by a bit since chipset is right below it.Having the foil not touching it would mean this would make a very little difference in temperatures, making your effort go to waste.
d_)WIFI & Bluetooth : This antenna is located to the left of the camera.So avoid foiling the top & left sides of camera.THESE SPOTS ARE FOILED IN THE PICTURE BUT YOU MUST NOT FOIL THEM.
d_)Speaker : Below the battery there is your phone's speaker.Don't cover it with foil (reason is obvious)
4_) Use tapes to stick the foils to the phone.The blue colored marks on the picture are the spots where I used tape on.
Enjoy!
And If you want to still be able to swap your microSD and sim card, do these steps on back cover of your phone (inside of it).This might prove difficult and probably less effective.But if you want even better cooling you can do both.Make sure the foil on your chipset and the foil inside of your back cover are identical and don't block the GPS signal ( http://puu.sh/dzJZ6/d234d3b347.PNG see how I left the bottom left naked? It's because of gps antenna)
And say good bye to your frying pan!
[Thanks to:
@Sipi1302 for the great feedback and making me notice GPS issues.
@Flying_Bear for helping me find where GPS antenna is located at.
Mourta for the idea of clothing insides of the back cover.He is a great developer and I highly recommend you to try out his work.]
Old method : (breaks GPS, possibly lower cell signal, here for informational purposes)
So I was using my friend's Iphone 5 today.I did some heavy gaming and his phone was transfering heat to all areas of the phone equally, making the chipset get rid of heat easily.If you played some games with 4x hd you'll notice only a part of it gets hot, the part below LG logo at back cover.
So I thought 'why not' and tried to transfer heat equally around the back cover.Had a simple but 'can be effective' idea.Surprisingly this worked greatly and I could feel the heat even at the sides of the phone.
So here is what I did:
The image pretty much describes it.I used aluminum foil to direct the heat from hot areas to cooler areas.While it sounds ridiculous it works like magic.
Note that I cut off the connection between the top and bottom aluminum foil so that chipset wouldn't heat the battery up.
(işlemci sıcaklığı = CPU temp and pil sıcaklığı = battery temp.)
No matter what I've done I couldn't get the cpu temperature to go above 60 until I did an antutu stability test and it was around 65 C in the end of the testing and quickly descended to 50 in a matter of seconds.
This screenshot was taken when I had a download of 4~ gb size and phone was just plugged off from charger (all this heats up the battery) so expect battery temperature lower than 40 C in normal usage. (37 ish in my case)
FAQ
Any side effects?
GPS
Did my own tests and while it does not block the signal completly, it weakens them and my phone failed to get a lock without or with foils.
Doing some research, it completly blocks off only if it's wrapped up in foil in multiple layers but test it for yourself.
From my testings it doesn't effect wifi or cell signal so if you don't use GPS (most apps use wifi or data to determine your location) it shouldn't be a problem for you.
Won't this make my sdcard/battery/SIM card unswapable?
You'll still be able to swap your battery, microSD and sim card exactly the same way you do now, if you follow only the optional steps.
Or you can follow the main and optional steps both and ease off with tapes on back side of the phone but optional steps only should be more practical if you swap them daily.
From my experience following both main and optional steps gives the best results.My battery's temperature is around 3 - 4 C lower now (37ish to 33ish) and CPU is sitting around 42 C during charging with wifi on.
But what do I gain from it?
1_)It will increase your battery life.How much depends on how you use your phone.If you put heavy load on it regularly this'll help a lot.If you don't use it long enough to even heat the chipset up it's help won't be noticeable.But even browsing the web gets this phone hot so...
2_)You'll get better performance from your phone : Hot CPU gives less performance compared to a well cooled CPU.Mainly due to throttling*.
*This may or may not prevent throttling on stock ROM as LG has stupidly put a tablet chipset into a phone with only throttling as a temperature adjuster.But I can guarantee no throttling on custom kernels with no overclock.
3_)You will be able to play games without your battery getting drain ridiculously fast.This is mainly due to battery heating up as chipset drains power from it/chipset's heat affecting battery and this will reduce this effect by reducing heat of both.
4_)Extends your phone's life.It is known that running electrical components under high temperature reduces it's lifespans.Battery in particular gets damaged over time, reducing it's capacity and eventually dying off.
5_)You can overclock your phone further as maximum temperature your chipset gets to is reduced enough to overclock it by a bit.
6_)Your chipset will barely heat up to the point of hurting your hands.
How to do it?
You need: 1_) A scissors 2_) An adhesive tape and 3_) A piece of aliminium foil equal to the size of your phone. (you need an additional piece equal to half the size of your phone if you are to follow optional steps [clothing insides of the back cover with aluminum enhances reduction of tempreature greatly])
If you adjusted the size by comparing it with screen, you might want to cut the edges of aliminium foil by a bit since back side of the phone has a smaller area than the screen. (do this at step 2)
1_) Shut down your phone (incase battery falls off)
2_) Take the back cover off, put the foil on top of your phone's back to compare sizes
3_) Now cut the aliminium foil to 2 pieces through the middle:
a_) The bottom piece as seen in picture will cover the battery
b_) The top piece will cover the chipset so make sure you adjust the size accordingly.
4_) *As seen by the picture above, the areas marked with red should be cut off to keep phone features functional (rear speaker, camera/LED and nfc areas)
5_) Now use tapes to stick the foil to your phone.I've marked the spots where I used tapes with blue on the picture but feel free to choose your own.Try your best to not get the tapes/aliminium foil stick out of your phone.
6_) Put the back cover back on, if anything is sticking out try to get rid of it.Mine has perfectly fit in so no one can notice it without opening the back cover.
*If you want to still be able to swap your microSD,battery and sim card, go easy on tapes and stick them only to two edges of each piece of aliminium foil.While it won't be as tight it will still work and you will have no trouble swapping them.You might want to follow the steps below instead if you swap SD/battery/SIM too frequently.
OPTIONAL STEPS (clothing insides of the back cover with aluminum foil)
This makes it more practical for those who swap sd card/battery daily only if you didn't follow the steps above.And if you have followed them, you can still do this to enhance the 'heat sink' further.
1_) Go to substep "b" of step 3 in the steps above and also do step 4.After you are done with them you should now have a piece of aluminum foil identical to the piece of foil we've used for the top (can be seen in the picture).
2_) Place it to insides of your back cover, it should look like this
3_) Use the tapes and stick the foil to back of your cover.
a_) OPTIONAL : See the small piece of foil on top of the camera gap? http://puu.sh/du9EB/5e4e9ff7ef.JPG
You can put the small piece of foil there, the one you have cut from the top piece earlier to make space for NFC connection.This should extend the area where heat is disposed.BUT don't repeat this with the back of the phone and make sure that the piece isn't too thick otherwise there will be a small gap between the back cover and the phone when you put the back cover back on which causes dust to fill in.
[Thanks to Mourta for the idea of clothing insides of the back cover.He is a great developer and I highly recommend you to try out his work.]
Alternative pictures for those who can't see puush pictures :
"Here is what I did"
Temperatures in trickstermod (pil sıcaklığı=battery temperature, işlemci sıcaklığı:CPU temperature)
And say good bye to your frying pan!

Will try and report back
Edit: can confirm that CPU temp does not go above 56 degrees on 1500mhz on performance governor
sent from my amazingly awesome OnePlus One with Stereo Mod
Don't forget to hit thanks!

Installed "cooling system" , now will se how is working.
Sent from my LG-P880 using XDA Premium 4 mobile app

abhi08638 said:
Will try and report back
Edit: can confirm that CPU temp does not go above 56 degrees on 1500mhz on performance governor
sent from my amazingly awesome OnePlus One with Stereo Mod
Don't forget to hit thanks!
Click to expand...
Click to collapse
Thanks for confirming

abhi08638 said:
Will try and report back
Edit: can confirm that CPU temp does not go above 56 degrees on 1500mhz on performance governor
sent from my amazingly awesome OnePlus One with Stereo Mod
Don't forget to hit thanks!
Click to expand...
Click to collapse
Just wondering if it in any way help to improve battery or not?

b886b said:
Just wondering if it in any way help to improve battery or not?
Click to expand...
Click to collapse
Well I actually extended the foil on top of the battery because I'm not using the stock lg one. My battery never goes above 21 degrees anyway and didn't increase with the CPU load either. That should help the battery a little bit but not much
sent from my amazingly awesome OnePlus One with Stereo Mod
Don't forget to hit thanks!

b886b said:
Just wondering if it in any way help to improve battery or not?
Click to expand...
Click to collapse
It does help but like I said in OP depends on how you use your phone.
If you play games a lot or if you use wifi and browser with multiple pages open (same goes for data) or anything that heats your phone up also heats your battery up.But if you are the kind of guy who uses his phone for calls, messaging and other small tasks it won't help noticeably.
It is known a hot battery discharges a lot quicklier than a cool battery.Our battery usually operates between 30 - 50 in normal usage also depending on what load you put on it so I'm not sure if it would help with his aftermarket battery but it'll def. help with stock battery especially under load.

ottomanhero said:
It does help but like I said in OP depends on how you use your phone.
If you play games a lot or if you use wifi and browser with multiple pages open (same goes for data) or anything that heats your phone up also heats your battery up.But if you are the kind of guy who uses his phone for calls, messaging and other small tasks it won't help noticeably.
It is known a hot battery discharges a lot quicklier than a cool battery.Our battery usually operates between 30 - 50 in normal usage also depending on what load you put on it so I'm not sure if it would help with his aftermarket battery but it'll def. help with stock battery especially under load.
Click to expand...
Click to collapse
Yeah my MPJ battery is unaffected after playing subways surfers on performance at 1300mhz while charging. Im sure the the stock lg battery would have been much hotter since its covered in plastic
The CPU went up to 61 but after I exited the game it fell to 56 and dropping
Sent from my LG-P880 using XDA Free mobile app

I cant see pictures can you provide another one please ?

dimi89 said:
I cant see pictures can you provide another one please ?
Click to expand...
Click to collapse
"Here is what I did"
Temperatures in trickstermod (pil sıcaklığı=battery temperature, işlemci sıcaklığı:CPU temperature)
OP updated with alternative links to pictures aswell

Looks like it's working After an hour playing GTA on charger the phone doesn't burn my hands ^^ and the battery temp is ~40 Celsius. One thing bugs me though: isn't the Wi-Fi antenna affected somehow by this? I always had a poor quality signal in my room but I'm not sure wether now isn't it slightly harder to connect.
Still, great idea man

So far I didn't notice eny problems with wifi connections on my phone. Although I didn't get connection on satellite using GPS, will try use GPS again at home.
Edit: sadly I have to confirm after removing aluminum foil connected on GPS satelits in few seconds so it seems that foil is blocking GPS antenna or maybe is just on my LG 4x HD.
Sent from my LG-P880 using XDA Premium 4 mobile app

wadimw said:
Looks like it's working After an hour playing GTA on charger the phone doesn't burn my hands ^^ and the battery temp is ~40 Celsius. One thing bugs me though: isn't the Wi-Fi antenna affected somehow by this? I always had a poor quality signal in my room but I'm not sure wether now isn't it slightly harder to connect.
Still, great idea man
Click to expand...
Click to collapse
I thought the same way and tested before applying foil and after, I can say that there is no noticeable difference.I have tested it with Wifi Analyzer (shows strenght in dbm) and results were identical, so were the download speeds and the range it can connect to router at.
I haven't tested GPS since I can barely get any signal in my city anyway.Though I doubt it'd effect it since people mostly use GPS in their cars and it still works despite it.Needs testing though @Sipi1302
Can you be more specific how you did the testing exactly?
Did my own tests and while it does not block the signal completly, it weakens them and my phone failed to get a lock with or without the foils.
Doing some research, it completly blocks off only if it's wrapped up in foil in multiple layers but test it for yourself.
Updated OP.This could create problems for people who use GPS but most apps decide location with location services that use wifi or data to determine it so you shouldn't worry about not being able to receive weater updates etc.

First I needed GPS in my car during driving, normally get locked in couple of second, but this time didn't get eny connection and no satelits. Than when I came home I try GPS again and no satelits visible so I remove foil and have 6-7 satelits visible and lock in 10 second and all that I tested inside my house.
Sent from my LG-P880 using XDA Premium 4 mobile app

Sipi1302 said:
First I needed GPS in my car during driving, normally get locked in couple of second, but this time didn't get eny connection and no satelits. Than when I came home I try GPS again and no satelits visible so I remove foil and have 6-7 satelits visible and lock in 10 second and all that I tested inside my house.
Sent from my LG-P880 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanks for letting us know.It doesn't make any trouble for me as I don't use GPS at all so didn't have it in mind to test but it might cause trouble for other users.I've updated 'sideffects' with GPS so people will be warned about it.

OK maybe cutting foil on place were is GPS receiver solve the problem, will see and report back
Sent from my LG-P880 using XDA Premium 4 mobile app

I did a slightly modified version,i used an aluminium tape,real thin one,and i taped it almost everywhere,and i didn't even need to tape it on the back cover. The temperature drops almost instantly to 34° after using,and i mean in the matter of seconds,never gets hot,and does not exceed 45°

DeHuMaNiZeD said:
I did a slightly modified version,i used an aluminium tape,real thin one,and i taped it almost everywhere,and i didn't even need to tape it on the back cover. The temperature drops almost instantly to 34° after using,and i mean in the matter of seconds,never gets hot,and does not exceed 45°
Click to expand...
Click to collapse
Good idea, thinner means it'll stick to even smallest of the corners but I'd recommend you to not use that on battery as it will transfer heat from chipset directly to the battery.Even while it doesn't touch it will make it heat up more than usual
Sipi1302 said:
OK maybe cutting foil on place were is GPS receiver solve the problem, will see and report back
Sent from my LG-P880 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I was planning to do the same but I have no idea where the gps receiver is.
Btw, using foil only at the backside of the phone with no foil clothed into the back cover gives better gps signal comparably.This is probably due to "faraday cage" effect and well we can just put a piece of aluminum between the back side of the phone and back cover to make sure there is no space between them, acts like a thermal paste in a way, avoiding faraday cage effect (blocks signals off) while maintaining similiar temperatures.
http://www.youtube.com/watch?v=cDyngdY8rD8
Interesting video.Aluminum would probably increase GPS signal too if placed properly, just need to figure out where the antenna is.I already found where cell antenna is, it's to the right of NFC connectors.While using single layer aluminum didn't reduce cell signal using double layer may have.I have excellent signal in my house so I'll have to test it somewhere else.

yellow-highlighted components are antennas (and a few of them are connectors, e.g. the one under camera), unclear which is which but I'm certain top-right one is cell antenna
http://site.repairsuniverse.com/images/LG-Optimus-4X-HD/optimus-4x-hd-repair-2.jpg
Source : http://www.repairsuniverse.com/lg-optimus-4x-repair-guide.html

ottomanhero said:
yellow-highlighted components are antennas (and a few of them are connectors, e.g. the one under camera), unclear which is which but I'm certain top-right one is cell antenna
http://site.repairsuniverse.com/images/LG-Optimus-4X-HD/optimus-4x-hd-repair-2.jpg
Source : http://www.repairsuniverse.com/lg-optimus-4x-repair-guide.html
Click to expand...
Click to collapse
gps antenna is probably somewhere near headphone jack, since our phone completely loses GPS signal if you plug in headphones

General Thermal MOD (hardware) Galaxy TAB S8 Ultra

This might not be useful for many, but if anyone wondered why their TAB performs "bad" under heavy usage (gaming, benchmarks, etc...)
S8 series (all of them) have almost next to none existent "cooling" solution. Here is the S8 Ultra for example:
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As you can see on these photos (my own S8 Ultra), this is what Samsung is doing in their Flagship devices, this is their ultimate "cooling solution".
Anyone who understands a bit more about how cooling SHOULD be done, heat transfer/dissipation, thermal paste, copper vs aluminum, etc... won't need much of an explanation, these photos will be enough for them. lol
This is my OWN S8 Ultra which I opened after I got tired from the heavy thermal throttling. Keep in mind that NOTHING will save you from thermal throttling, not a custom ROM, not a custom KERNEL, nothing, this is not a software (code) issue, this is simply a SOC that consumes up to 20W and Samsung decided to troll us by implementing actually nothing but garbage "cooling" inside and obviously added GOS to limit the s*** out of the SOC to prevent from heating too much.
SD8 Gen 1 is a very power-hungry and inefficient SOC made by Qualcomm (one of the worse), and even phones which actually have copper heat pipes or vapor chambers (copper) still struggle with this SOC, now imagine what is happening to the S8 lineup with this kind of "cooling solution" and why is the TAB thermal throttling so heavily.
And here is my "simple" thermal MOD I did and the results after the mod (partially, I don't have all the screenshots/photos anymore).
If you're wondering what I did...Well, here are a few things:
Removed the Aluminium foil which was on the CHIP (SOC) itself, replacing it with a 0.2mm copper shim, and instead of using a thermal paste between the copper shim and CHIP, I added a thermal pad.
On the TAB frame itself, I removed the 0.01$ worth of "premium" thermal pad added by Samsung to our "flagship" "QUALITY" device, added a "longer" copper plate (0.2mm), pushed it under that plastic frame which is on the aluminum frame attached (holds the screws from the cover over the logic board) and added a thermal paste between the TAB frame and that copper plate since thermal pad was too thick and I didn't have much space to play with since I wouldn't be able to attach the logic board properly and the screen panel wouldn't be able to "fit" "flat" on top (it would be probably pushed, and potentially damaged by the logic board apply pressure on it).
I added the long copper plate there and used thermal paste between the frame for ONE and a very GOOD reason. The frame of the tab is FULL aluminum, basically, the WHOLE frame, and the copper plate through the thermal paste will transfer the heat to the frame of the tab, increasing the chance of better heat dissipation through the frame itself vs the stock mode was barely covering by those 2 small thermal pads concentrating the heat on a small area.
Now the heat on the back of the TAB is actually spreading over a MUCH larger (basically half of the back frame) area and this obviously results in far better heat dissipation and increases the cooling CAPACITY.
Between this copper plate and the actual SOC with the copper plate, I used again a thermal pad.
Wonder about the results? Sure. (I don't have all the screenshots or photos, but you can compare your results with mine, that will tell you "enough").
If you have any further questions, feel free to ask. Happy to help in any way possible.
(Ermm, removing the display was not a happy experience, FYI, it was difficult and the panel is VERY THIN, PROCEED WITH CAUTION, assuming that you have the necessary equipment/tools and experience)
Have fun modding. (Not my first thermal mod though).

Something similarly is possible with Apple M1 notebooks if i remember correctly.
This is very impressive

Fantastic project, but almost no one can do it as it is very difficult.. Didn't expect so bad work from Samsung regarding cooling..

quite disappointing to see we need to open that tab to get the full potential from it..
bought the S8 at 380€ (discounted price + trading old broken tablet) but still find it expensive for a device with supposedly the most powerful soc and sometimes lagging in games .
that reminds me of a video with a guy modding a mid-range phone and getting better perfs than GEN1..
Is the process for opening it very risky? I keep bad taste of opening a previous windows tablet to repair its screen and ended up completely breaking it..
Catmobile said:
Something similarly is possible with Apple M1 notebooks if i remember correctly.
Click to expand...
Click to collapse
yeah on MBA you get same perf passively cooled as actively cooled MBP (like in this vid)
the difference is that it seems so much easier to open MBA than this tablet where you need to remove its screen to get inside..

Nice !
Thermal paste to the shield and then thermal pad to the whole aluminium frame ? If that's correct I'd say Samsung did a good job. They just didn't cover them fully that's all.
Do you happen to have the exact position of the SoC on the frame ?

I wonder what temps you would get with liquid metal.

Man this makes me angry. How incompetent are Samsung

mariasanchez said:
Nice !
Thermal paste to the shield and then thermal pad to the whole aluminium frame ? If that's correct I'd say Samsung did a good job. They just didn't cover them fully that's all.
Do you happen to have the exact position of the SoC on the frame ?
Click to expand...
Click to collapse
Samsung didn't even do CLOSE to a good job. Yes, I can post some screenshots from the video of the disassembly and you'll see where the SOC is under that Alumium shield and how are the thermal pads positioned.
It's a JOKE whoever's idea was to do it like this. The SOC (the actual heat source) is not even touching the thermal pads, only the side of that shield is, hence why are there such high INSTANT temperature peaks when you launch something demanding, like a game or a benchmark test.

vangry2020 said:
I wonder what temps you would get with liquid metal.
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Actually nothing much. LM would only help with idle temps, they would be definitely lower due to higher thermal conductivity, but under stress/load you would be still hitting the thermal threshold due to the cooling capacity limit. LM doesn't increase the cooling capacity limit, it only increases the thermal conductivity and faster heat transfer.

I think Samsungs idea was to use back plate made of aluminum as a way to cool the galaxy tab s8 ultra down. By letting heat spread out into aluminum. Which is probably why.
If now back side was removed.
Update: NVM after checking pictures in main topic closer i saw now that it was glas and display that was removed.

Because i couldn't understand exactly what you did, i searched for a disassembly video. This one i think is the best. After 4th minute it shows the chip.

This is amazing. Thanks for sharing this, I'm probably going to end up doing something similar eventually but for now am trying to enable my simcard slot in the WiFi version ... I'm guessing they were too lazy to make 2 versions and just disabled the WiFi versions sim slot, they even glued a fake simcard to the tray .. it's hilarious

infinitist said:
This is amazing. Thanks for sharing this, I'm probably going to end up doing something similar eventually but for now am trying to enable my simcard slot in the WiFi version ... I'm guessing they were too lazy to make 2 versions and just disabled the WiFi versions sim slot, they even glued a fake simcard to the tray .. it's hilarious
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Thanks a lot for the detailed pics ! I'll give it a go as well but just for fun, I never experienced slowdowns on the tablet.

That is microsd slot not sim. Sim in wifi model probably also missing SIM chip and 4G chip and such. So you can't enable any SIM in wifi model.

I ended up grinding the frame on the back to expose the CPU thank to the pictures you posted. Extremely easy to do with the 1mm aluminium frame, it grinds even at low speed.
Then I put a 17x17x1.3mm copper spacer with thermal paste on the CPU, and finally a big but very thin copper plate taped on the back. This way you can even switch the copper plate with a small fan if you're a hardcore player/benchmarker.
I can fill its heat now when touching the plate. Home, Task switcher, Fennec and co feel extremely smooth and snappy but seriously it was probably already like that before.
Anyways again thanks a lot ! Thanks to your thread I was able to locate the chip to grind the frame (3 to 23mm from the pen and 10 to 36mm from the camera).

did you try undervolting your gpu? that might help too