I was thinking about doin this but I have NO idea what would be a good/safe amount to undervolt/underclock. The main reason i want to do this is to get some more juice outta my battery but I'm not sure what a good amount is. Is there a way to keep performance and overall "snappiness" of the phone about the same and still get a good gain of battery life? Also is there anyway i can damage my phone by doing this? Sorry if these are stupid questions but i wanna be safe
I'm on CM 6 RC if that makes any difference. Thanks
Anyone? Using SetCPU btw
I used an 800mV kernel for a while and had SetCPU @ 806mhz -- battery life was insane.
SetCPU doesn't make a difference in battery life, it can only shorten it. The kernal already has the best settings for CPU speed built in.
The main function of SetCPU is to overclock.
evilkorn said:
SetCPU doesn't make a difference in battery life, it can only shorten it. The kernal already has the best settings for CPU speed built in.
The main function of SetCPU is to overclock.
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Ah did not know that thank you
So with that in mind, is there any kernel you would recommend? Or am i just better off with what's already installed
Stock (cyan's) works fine for me. Try them and find out which works best for you.
Thankfully people stopped releasing their own kernals in masses... but they were replaced by winzip roms...
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!
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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.
Which kernels are you guys using, specifically with THS build 15? Is there noticable difference in day to day applications by flashing one of these kernels? What benefits do they offer (responsiveness)?
Also, how does overclocking effect the phones battery life, and heat output? I would assume a 300mhz overclock would produce a significant amount of heat and drain battery much quicker.
Can somebody bring me up to speed
Cheers
i heard that DEVIL 14.2 is good with cm9 build 15...... and yeah...of course.....overclocking will drain your battery muck quicker.... but u can under-volt to save battery life though undervolting stability depends on your kernel. for overclocking and undervolting glitch is better ( as far as i observed ) but personally i like devil kernel.
zamiurratul said:
i heard that DEVIL 14.2 is good with cm9 build 15...... and yeah...of course.....overclocking will drain your battery muck quicker.... but u can under-volt to save battery life though undervolting stability depends on your kernel. for overclocking and undervolting glitch is better ( as far as i observed ) but personally i like devil kernel.
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Thanks for the response! While I'm an avid PC overclocker, I don't have to worry about battery life there , I think I will keep my 1000mhz and battery duration where it is. I'll likely try the Devil's kernel just waiting on a couple more responses
Hello,
So im willing to try some kernels for my Nexus to see whats the best for my needs.
I want to compare the stock kernel to the leankernel, franco kernel and the ElementalX kernel.
Comperasion criterias:
1. Faster booting
2. Fastest performence as possible without hurting battery life in comparison to the stock kernel.
3. Better battery life as possible without hurting performence in comparison to the stock kernel.
So how can i compare those kernels? should i just flash each kernel and use AnTuTu Benchmark and Better Battery Stats on each one of them?
Choosing the best kernel for me is to give a try for each one and see for myslef - i know that. But i want to see the stats in front of me to reasure im picking the best one and also beacuse iv'e used the chroma and euphoria roms which use leankernel and franco kernel but im not sure the difference is noticeable by eye.
Also, feel free to share your current kernel and opinion about it
torecdude said:
Hello,
So im willing to try some kernels for my Nexus to see whats the best for my needs.
I want to compare the stock kernel to the leankernel, franco kernel and the ElementalX kernel.
Comperasion criterias:
1. Faster booting
2. Fastest performence as possible without hurting battery life in comparison to the stock kernel.
3. Better battery life as possible without hurting performence in comparison to the stock kernel.
So how can i compare those kernels? should i just flash each kernel and use AnTuTu Benchmark and Better Battery Stats on each one of them?
Choosing the best kernel for me is to give a try for each one and see for myslef - i know that. But i want to see the stats in front of me to reasure im picking the best one and also beacuse iv'e used the chroma and euphoria roms which use leankernel and franco kernel but im not sure the difference is noticeable by eye.
Also, feel free to share your current kernel and opinion about it
Click to expand...
Click to collapse
1. Stop watch
2 & 3: Not really possible. To give to performance, takes from battery and vice versa. You give 1 to performance, you take 1 from battery. There are no magic settings that allow you to give 1 to performance and only take 0.5 from battery.
I hope the attached image helps to explain that
There are also other things to factor like the governor, scheduling, hot plug support , etc.
For example elementalX has its own Governor and I'm not sure it will even default itself to be used. You will need some type of kernel configuration tool to enable it .
There is also how YOU are using your phone. Just too many variables to consider
Sent from my Benzo'd Google N6 on VZ
DebianDog said:
There are also other things to factor like the governor, scheduling, hot plug support , etc.
For example elementalX has its own Governor and I'm not sure it will even default itself to be used. You will need some type of kernel configuration tool to enable it .
There is also how YOU are using your phone. Just too many variables to consider
Sent from my Benzo'd Google N6 on VZ
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Click to collapse
Yeah for sure.
I always say that because kernel x performs more than kernel y out-of-the-box, it doesn't mean you can't set kernel y up to perform like x... It's just a trade off whichever way you go.
My personal advice is find a kernel that has the features you want, then configure the governor with the bias you want to see. I always go for Elementalx. @flar2 sets the best balance of battery and performance in my opinion, though I always alter my settings to suit my needs anyway
This is an outdated device, but since SD801 is so efficient, I gave it a try.
Warning - undervolting is a risky process. It may constantly crash your device, make it unusable or you can actually lose all of your data. Be aware.
So, after reading various articles about CPU binning concept, I thoroughly examined my device's potential. Note, that every device is different, regarding CPU quality and etc.
Anyways, I am running stock rom with Boeffla kernel. I actually gave up, when my device was getting hot - I don't like that at all. Since thermal throttling is really aggresive, I wanted to get away from that completely. And I did.
Currently my phone is heavily undervolted (by 0.1V to be exact) and to be honest, CPU temperatures now never ever exceed 50ºC. With stock voltages, I could easily reach 80ºC.
Anybody else tried doing undervolting? Share your experiences. I would greatly appreciate that.
what is the benefit of it?
does it give a better battery life............?
binadam23 said:
what is the benefit of it?
does it give a better battery life............?
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Click to collapse
The only real benefit of undervolting is to reduce temps. Even so it isn't recommended because of the risk of instabilities.
Saber.
Saber said:
The only real benefit of undervolting is to reduce temps. Even so it isn't recommended because of the risk of instabilities.
Saber.
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Click to collapse
lower temperature = lower power consumption = better battery life.
Kriomag said:
lower temperature = lower power consumption = better battery life.
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Click to collapse
Not necessarily. In my experience in kernels, undervolting only brings marginal power savings. Most battery drain is from open apps and from the display.
Saber.
Wake locks play a big role too I always turn off as may features as I can on my s5 verizon and settings database editor App to turn off more features than normally possible
Sent from my iPhone using Tapatalk
Saber said:
Not necessarily. In my experience in kernels, undervolting only brings marginal power savings. Most battery drain is from open apps and from the display.
Saber.
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Not exactly marginal from my experience. It also depends on which frequency CPU is running. At higher clocks, lower power consumption is more noticeable than on lower frequencies.
airidosas252 said:
Not exactly marginal from my experience. It also depends on which frequency CPU is running. At higher clocks, lower power consumption is more noticeable than on lower frequencies.
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Well, that's not quite the same as what I was saying.
Different CPU frequencies use different current levels which will affect the power draw. So in this case, it will affect the battery savings. Whereas undervolting alone doesn't bring much of a difference due to the already efficient design of our SOC (well, at least in my case ).
Saber.
Undervolting -> Lower Temp -> Less Throttling -> Better Performance with slightly better battery life.
Sent from my SM-G900F using XDA Labs
Throttling is really noticeable with stock voltages. Play some games for a while and you'll start to feel that phone is getting slower and hotter. Not the case anymore after undervolting. If your phone can handle upto 0.1V undervolt, then your SOC is in good shape.
Wlld1 said:
Undervolting -> Lower Temp -> Less Throttling -> Better Performance with slightly better battery life.
Sent from my SM-G900F using XDA Labs
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i can confirm this, i feel my phone is really snappy now and slightly worm, not hot anymore
I use 300-2000Mhz and heavy UV 620-850V. I also use "use_spi_crc=0".
After phone reboot on stock i get 80'C (cpu tem module in xposed) and on my settings it is not reaching 60'C
What about battery life? it needs long testing, i can assume that its slightly better because less energy is converted in to heat
There seems to be some misconception on undervolting.
In theory undervolting should translate to better battery life. However....
Real world results tell a different story as it shouldn't really make much difference at all. For example, not all S5 phones run the same voltage tables (different CPU quality require more/less voltage), yet they achieve the same battery life. So what voltage was set by the manufacturer (Samsung) is already the optimum voltage.
You will definitely achieve better thermals after undervolting, but in the custom kernel world, most kernel developers will not be able to provide help in the case of instabilities. Some kernel developers may not even provide undervolting support because there just isn't a great enough benefit other than improving thermals.
Saber.
What about undervolting Busses, Image processing System, MMC Memory, GPU and CPU?
I`ve got the exynos variant of the S5. I undervolted to -85 all of that stuff and the phone now doesn't heat at all and battery life isn't that amazing but it is noticeably better
Rudy1967 said:
What about undervolting Busses, Image processing System, MMC Memory, GPU and CPU?
I`ve got the exynos variant of the S5. I undervolted to -85 all of that stuff and the phone now doesn't heat at all and battery life isn't that amazing but it is noticeably better
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I'm using the snapdragon variant with boeffla kernel so only the CPU is allowed to be undervolted.
Undervolting other components alongside the CPU will make a more noticeable difference in terms of battery savings. It still isn't recommended by many kernel devs as these other components are more sensitive to slight voltage changes (including the bus).
Saber.
Saber said:
I'm using the snapdragon variant with boeffla kernel so only the CPU is allowed to be undervolted.
Undervolting other components alongside the CPU will make a more noticeable difference in terms of battery savings. It still isn't recommended by many kernel devs as these other components are more sensitive to slight voltage changes (including the bus).
Saber.
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Yeah it actually makes a slight difference in battery life, But I don't think anyone should go below these values since I started to get Screen of death and all that kinda stuff that happens when phones are very undervolted haha
If there's a kernel that allows users of Snapdragon phones to undervolt that hardware, I really recommend you to do it, it really helps battery's performance if you need that extra hour of Screen On time
Now, all of this changes are not recommended cause there could be problems with your phones if you're not sure bout the parameters you're playing with.
does anybody else have problem with gpu oc ? no matter what settings i use there is no performance increase at all, its like the 600Mhz is permanent even when all monitoring programs show 700-800Mhz :/ I have tested gpu many times using 3dmark - always the same fps (600-800Mhz). With 200Mhz increase in frequency it should be significant increase in fps!