Database Develop

[Q] Benefits of OC/UV

What are the benefits of OC/UV (particularly for CM7)?
I know of improved performance due to OC, but what does UV do in regards to performance. Also, how does an OC/UV kernel compare to one without the option?

your processor doesn't need as much voltage as the stock settings--undervolting lets you save battery
personally i want to know.. do you have to UV to OC?

xredjokerx said:
your processor doesn't need as much voltage as the stock settings--undervolting lets you save battery
personally i want to know.. do you have to UV to OC?
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Click to collapse
You can do either or both but don't have to do both. At some point UVing will cause a crash. Right before that point it can cause performance issues. See the link below for instructions on how to find an optimal UV level to maximize battery savings and performance.
http://forum.xda-developers.com/showpost.php?p=10936691&postcount=1102
OCing improves speed but can also cause stability issues. For a captivate this usually isn't a problem until you get past 1.2 ghz. After that, it depends on the kernel but I have yet to find a kernel that is completely stable past 1.2 ghz under stressful conditions. Samsung designed the processor to handle 1.2 ghz and in theory it can go up to at least 1.6.

Like everyone before me has said, OC will make your processor work more (which will eat up more battery, and send the temps a bit higher).
UV is a way to "fix" that problem by controlling the voltage used by each Mhz/Ghz range. The mini guide that QuarkGluonSoup posted is a great way to start off.
Most Captivates start have random errors past 1.2Ghz, but the highest I've seen (stable) are 1.4Ghz.

venomio said:
Like everyone before me has said, OC will make your processor work more (which will eat up more battery, and send the temps a bit higher).
UV is a way to "fix" that problem by controlling the voltage used by each Mhz/Ghz range. The mini guide that QuarkGluonSoup posted is a great way to start off.
Most Captivates start have random errors past 1.2Ghz, but the highest I've seen (stable) are 1.4Ghz.
Click to expand...
Click to collapse
Odd as it sounds, my battery life on CM7 is close to 50% better when it is OC'ed to 1.2 ghz and UV'ed than it was on the froyo ROMs under the same conditions.

That really is odd :S I think I'll try it myself.

[Q] Fastest Captivate 2.3 Rom?

Which of the current 2.3 ROMs is considered the fastest/most responsive? Or which ROM would be considered the fastest based on the mods & tweaks used by the developers? I'm not to versed in the technical side of things to discern which tweaks/mods/kernels/etc give way to the most stability, speed, and response and would like the community's opinions on the matter.

Probably CM7, I just started using it and there is never any lag. I haven't even OC'd it yet. This also comes with the price of having to live off a wall charger though.
Sent from my SGH-I897 using XDA App

If you mean fastest in clock speeds, then thats a balance betwen rawr clock and how much battery life you can get out of it. Keep in mind these phones clock easily 1.2ghz-1.3ghz no issues past that you need to increase the voltage. So you can in theory get 1.6ghz-1.8ghz but you will live next to a charger. If you mean fastest on how it feels Id have to say Continuum moved awesome few months back (haven't used it in a while) Atomic Fusion if the ext4 version comes out. But there you should just test them out.
On a side not if you want to OC your phone and not have to pay for the oc app, then Id suggest you stick to I9000 ports or AOSP's like CM7 or MIUI. Native roms like Cognition 5, Atomic Fusion and Nuclear Fusion need Tegrak for OC/UV.

Which of the I9000s seem to run the fastest/smoothest? I've been looking at Dlev and Darky but how does Apex/Symply GS II/Mosaic/Sensation compare?

prbassplayer said:
Keep in mind these phones clock easily 1.2ghz-1.3ghz no issues past that you need to increase the voltage. So you can in theory get 1.6ghz-1.8ghz but you will live next to a charger.
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I actually read in the Glitch kernel thread that when overclocking, higher voltages doesn't always mean more stability. I'm OC'd at 1.5ghz right now really stable and I was UV'd at -50mv but I just dropped it to -75mv to see if its stable there. I'll keep dropping it till I have issues.
Oh yeah, and CM7's battery life has got WAY better over time, so I'm not having to worry about charging all the time either.
Sent from my Samsung Galaxy S Captivate

Reamer09 said:
I actually read in the Glitch kernel thread that when overclocking, higher voltages doesn't always mean more stability. I'm OC'd at 1.5ghz right now really stable and I was UV'd at -50mv but I just dropped it to -75mv to see if its stable there. I'll keep dropping it till I have issues.
Oh yeah, and CM7's battery life has got WAY better over time, so I'm not having to worry about charging all the time either.
Sent from my Samsung Galaxy S Captivate
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From my experience to maintain a stable phone i over volt the "step" that's overclocked, and then undervolt the other "steps". Im by no means a expert nor is there a full proof way to do it. Each phone kinda reacts differently on the overclocking past 1.2-1.3ghz.

Which of the I9000 roms should theoretically run faster due to the tweaks/mods used by the developers without the need to overclock?

There if no need to overclock for daily use. Only if you are playing very demanding games. And only during those games.
As for fastest rom....have a search this question gets asked a lot with always the same answer and result:
There is no best rom, all phones are different as well as tastes, what's best for me on my device may not be on yours. Flash and try a few and make you own decision...

CM7 is fastest but Display and Sound quality is not as good as stock ROM .

Before school started for me and i couldnt access a charger when i wanted to, i used MIUI at a stable 1.6 GHz ALL of the time with odemand govenor and i got like 18 hours with moderate use, on Glitch V12! And you dont need to overvolt for higher speeds i have tested it and its better to undervolt higher clocks, i get better battery and performance!
Sent from my Stock KH3/4 2.3.4 Captivate using the XDA Premium App!

For the 10th time Each phone reacts differently to Overclocking. There is no sure way to get it OC/Uv. On my phone past 1.2ghz i need to over volt.

prbassplayer said:
For the 10th time Each phone reacts differently to Overclocking. There is no sure way to get it OC/Uv. On my phone past 1.2ghz i need to over volt.
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Well i ran 1.6 GHz undervolted at ever clock speed fine, had better performance than over volting, so its different
Sent from my Stock KH3/4 2.3.4 Captivate using the XDA Premium App!

[Q] clocking cpu

i am fairly new to rooting phones. i just installed cyanogen 7 on my htc hero. works much faster than the stock. had heard that you can overclock the cpu. i downloaded CPUmaster free and lets me clock cpu to 768MHz. have been doing some research on this and have come across a few things. so really just one question; 1) what is the fastest you can clock the cpu with it still being stable?
help with this would be very much appreciated!

Depends on a variety of factors and every Hero is different. Depends on the ROM your running, kernel, etc. You can play around with capped and uncapped kernels but no one can really give you an exact # but you..u'll just have to try tinkering with the settings. If your wise you will just select one of the governors located in Cyanogenmod Settings. I prefer SmartassV2,min. 362 max 691 its efficient and takes care of everything while prolonging the life of your battery. Also remember that overclocking for an extended period of time will overheat your phone and could cause damage, so keep an eye on the core temp while playing with ur cpu settings.

1big_bear said:
i am fairly new to rooting phones. i just installed cyanogen 7 on my htc hero. works much faster than the stock. had heard that you can overclock the cpu. i downloaded CPUmaster free and lets me clock cpu to 768MHz. have been doing some research on this and have come across a few things. so really just one question; 1) what is the fastest you can clock the cpu with it still being stable?
help with this would be very much appreciated!
Click to expand...
Click to collapse
Some phones can't take more than 691, some can handle 768. I have found, for my phone, that 245/710 works great for me. I can see a marked improvement in snappiness at 710 over 691, but not really much at higher frequencies.
I used to use OnDemand as my scheduler, but with the newer .35 kernel I have liked the SmartassV2; I don't have any issues with music cutting out like i would with smartass or interactive. CM7, or most any of the roms built off of that, have the option in CM Settings to adjust both the frequency and governor so you don't need to install a 3rd party app to do so (it's under the "performance" heading). I also like to go into the spare parts app and set my animations to fast; that's just me though. I think the new CM7 builds have Jaybob's .35 kernel now instead of the .29. I have not seen an uncapped kernel that goes beyond 768 in a long time. There was one that jasonmaloney compiled that did 806 (I think) but that was pulled by him as it isn't good for the phone. just test it out and see what you like with what you have installed on your phone. Every phone is different even though they are the same.

[Q] Overklocking and kernels

Hi!
I've struggled with my Incredible S for a long while now. Asked questions here and so on but haven't really got any answers.
Things went something like this: My mate rooted his and my IncS same time with Revolutionary. We both installed ARHD and overcloked to 1920mhz just for the lulz. Everything went just fine for a while for both of us, but then I decided to restore my apps sms etc from the stock rom with MyBackup (or what ever its called). Restore failed at some point and I needed to flash ARHD again.
Ever since my CPU hasn't been able to reach 1920mhz or anywhere close ever again. I've been flashing dozens for ROMs now and only few of them could be O/C to 1600mhz. Some freeze at 1152mhz instantly, others can be stable for few minutes and then crash.
My mate is running CM7 with enki-v0 kernel at max O/C without any problem. I tried CM7. It started to become unstable with default O/C after few days and I had to siwtch back to some Sense Rom that worked at normal O/C.
Why some kernels (forexmpl Quattro beta 6) allow me to O/C at 1.6Ghz and others freeze just at 1.1Ghz? (Affinity,Unity,Niks trinity, Quattro betas 7- Rc3)
And why my CPU can't reach the 1.9Ghz anymore? Could I **** something up and the CPU is broken now or is there something wrong with my rooting?
TL;DR Only few Roms and kernels allow O/C and with them its a pain in the ass cuz of unstability, why?
- And I'm not looking for solutions like "Flash to stock". I know how to get it stable, but then again 1Ghz stock ain't that cool.

How are you overclocking? I've never used CM7 before, but I do use SetCPU. Every time you flash a ROM you need to go into SetCPU and Device Selection and then Autodetect Speeds Recommended. Either that or you can try selecting Show Other Frequency Sets and pick your processor from there.
Basically the only thing I can think of is that your processor is not being recognised correctly.
BTW When you say "Everything went just fine for a while" how long is a 'while'? The only reason I ask is, how sure are you that running your processor smoothly at 1920mhz for that period wasn't just a fluke, and your phone (for whatever reason) cannot normally run at that speed? From what I understand, even phones of the same model can differ as to the speeds at which they can be overclocked. Maybe you just got lucky the first time, and now that lucks run out?

Dont you think that 1.9 ghz is a bit dumb... You might (have) damage(d) your cpu by doing that. If i would oc my 3ghz pc to 5ghz without cooling modification i would fry it in half an hour.
I mean cmmon use your brain. Oc it to smth logical like 30% (1.3 ghz) and you will not have such problems .... Sorry, but that just sounded plain stupid to me
Sent from my HTC Incredible S using xda premium

CyanideJack said:
How are you overclocking? I've never used CM7 before, but I do use SetCPU. Every time you flash a ROM you need to go into SetCPU and Device Selection and then Autodetect Speeds Recommended. Either that or you can try selecting Show Other Frequency Sets and pick your processor from there.
Basically the only thing I can think of is that your processor is not being recognised correctly.
BTW When you say "Everything went just fine for a while" how long is a 'while'? The only reason I ask is, how sure are you that running your processor smoothly at 1920mhz for that period wasn't just a fluke, and your phone (for whatever reason) cannot normally run at that speed? From what I understand, even phones of the same model can differ as to the speeds at which they can be overclocked. Maybe you just got lucky the first time, and now that lucks run out?
Click to expand...
Click to collapse
I use SetCpu and every time it recognizes automaticly some speeds and I use them. The manual setup is bit beyond my knowledge.
The while was something like 3 days or so. Hard to remember. But still wayy more than like few minutes. I will try to set SetCPU manually, thx!
Psyloid said:
Dont you think that 1.9 ghz is a bit dumb... You might (have) damage(d) your cpu by doing that. If i would oc my 3ghz pc to 5ghz without cooling modification i would fry it in half an hour.
I mean cmmon use your brain. Oc it to smth logical like 30% (1.3 ghz) and you will not have such problems .... Sorry, but that just sounded plain stupid to me
Sent from my HTC Incredible S using xda premium
Click to expand...
Click to collapse
I know 1.9ghz is dumb. I used it back then only in short bursts. Usually scaling "interactive" between 245mhz - 1.5Ghz. Now even that is too much for most kernels. I thought that the freeze is caused by the CPU protecting itself from getting damaged or something, but not sure.
Still if the CPU was damaged, why would Quattro beta 6 kernel run at 1.6ghz without overheat or anything and RC3 kernel freezes at 1.1Ghz when try to load something more than homescreen..
I would use beta 6 kernel for quattro, but it does not support wifi in RC3.. Virtuous team made some changes to kernel at beta 7 and I would love to know what changes..

inSaN1Ty_X said:
I use SetCpu and every time it recognizes automaticly some speeds and I use them. The manual setup is bit beyond my knowledge.
The while was something like 3 days or so. Hard to remember. But still wayy more than like few minutes. I will try to set SetCPU manually, thx!
I know 1.9ghz is dumb. I used it back then only in short bursts. Usually scaling "interactive" between 245mhz - 1.5Ghz. Now even that is too much for most kernels. I thought that the freeze is caused by the CPU protecting itself from getting damaged or something, but not sure.
Still if the CPU was damaged, why would Quattro beta 6 kernel run at 1.6ghz without overheat or anything and RC3 kernel freezes at 1.1Ghz when try to load something more than homescreen..
I would use beta 6 kernel for quattro, but it does not support wifi in RC3.. Virtuous team made some changes to kernel at beta 7 and I would love to know what changes..
Click to expand...
Click to collapse
have a look at the changelog and the source code, both in the thread.

Nonverbose said:
have a look at the changelog and the source code, both in the thread.
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Click to collapse
From the source code I don't understand a single thing
and...
"New kernel V5 (new acpu table, updated GPU drivers)"
What is acpu table? GPU thing I get, but hardly it can prevent from O/C?

what kernel can i over clock it?

hey everybode!
i wanted to know i have rocket rom and i want to use setcpu to overclock my kernel
and sebastian is max to 1400 is thers good kernel that i can play with it till 1700mghz or 1900?
but it need to be stable

Abyss goes to 1700. My CPU can't take it, sadly

bubu23 said:
but it need to be stable
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The stability is dependant on your hardware; some chips can only overclock to 1500Mhz and some can overclock all the way to 1900Mhz. It is not something the kernel has a say over.

Don't all of the notes have the same cpu? Why can some be overclocked and others not?
Sent from my GT-N7000 using Tapatalk

kkg720 said:
Don't all of the notes have the same cpu? Why can some be overclocked and others not?
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Click to collapse
They all can be overclocked, but how much is a different thing altogether. It's quite simple really, not every chip manufactured is of equal quality; some chips have more imperfections. The more imperfections the less it can be overclocked before it becomes unstable. It's the same thing as on PCs, too.

Stable is it when you do nothing and use it in originally form. Overcklocking need more Power more power is less time you enjoj your note!

Generally these chips are made to tolerate a certain speed, and because of variability, the manufacturer drops the speed tolerance to ensure overall quality. Some will still be able to manage 1500, 1700, or even 1900 (although rarely, I'd say). Just about all of them tolerate 1400, so very few are defective at the stated tolerance. With 5 million, you will get a few, however.
This is one of those rare occasions when statistics have a benefit in the real world!

jeromepearce said:
Generally these chips are made to tolerate a certain speed, and because of variability, the manufacturer drops the speed tolerance to ensure overall quality. Some will still be able to manage 1500, 1700, or even 1900 (although rarely, I'd say). Just about all of them tolerate 1400, so very few are defective at the stated tolerance. With 5 million, you will get a few, however.
This is one of those rare occasions when statistics have a benefit in the real world!
Click to expand...
Click to collapse
I will keep mine at stock speeds because ignorance is bliss

bubu23 said:
hey everybode!
i wanted to know i have rocket rom and i want to use setcpu to overclock my kernel
and sebastian is max to 1400 is thers good kernel that i can play with it till 1700mghz or 1900?
but it need to be stable
Click to expand...
Click to collapse
There are many out there that will let you overclock. Search the Android development forum.
Like most, I have flashed heaps of times, probably at least four or five times a week when I first got this wonderful Note, but in the last month or so have only been tempted to stray three or four times. Personally Franco 6 is best for me, because I favour battery life and stability rather than overclocking (1400MHz is not bad as a standard!!)
I would encourage you to try a few for a few days, as long as you backup often you should have a great experience!

Are all kernels capable of overclocking?
Is there one that overclocks the best?
How do you tell how high you can go?
Do you jusy keep overclocking until the NOte stops working?
If so, there must be a fine line.

jeffs99 said:
Are all kernels capable of overclocking?
Is there one that overclocks the best?
How do you tell how high you can go?
Do you jusy keep overclocking until the NOte stops working?
If so, there must be a fine line.
Click to expand...
Click to collapse
Stock kernel isn't capable of overclocking.
One way to tell is to download things like SetCPU which detects the range of the clockspeed. Another way is to simply read the description of the kernel thread.
How high your phone can go is an individual thing. You need to overclock in slight increments (say 50mhz at a time) and run a stability test to see if the phone crashes or not.
You DO NOT pull the slider all the way to 1.9 ghz and "see" if anything happens. If you fry your CPU, do not come to us for help.
This is why I don't like overclocking, it's a waste of time to run the stability tests, etc.
In summary, you need to raise it a little bit, and run stability tests and repeat the process until your phone crashes. At that point, you'd know the last safe-stable clockspeed that your CPU can take.

PoisonWolf said:
Stock kernel isn't capable of overclocking.
One way to tell is to download things like SetCPU which detects the range of the clockspeed. Another way is to simply read the description of the kernel thread.
How high your phone can go is an individual thing. You need to overclock in slight increments (say 50mhz at a time) and run a stability test to see if the phone crashes or not.
You DO NOT pull the slider all the way to 1.9 ghz and "see" if anything happens. If you fry your CPU, do not come to us for help.
This is why I don't like overclocking, it's a waste of time to run the stability tests, etc.
In summary, you need to raise it a little bit, and run stability tests and repeat the process until your phone crashes. At that point, you'd know the last safe-stable clockspeed that your CPU can take.
Click to expand...
Click to collapse
Thanks!
What do you recommend for a good stability test?

I'm on franco.kernel v10 and OC to 1600 using Tegrak. Tegrak runs the stability tests automatically and reverts to stock 1400 if unstable or a reboot occurs.
I tried 1700 but Note rebooted after about 2 minutes. Booted right back up at 1400 with no problems. Re-set to 1600 and running smoothly.
kraz
Sent from my Beautiful, White GT-N7000 using xda premium

Set CPU has a CPU stress test
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