Hello!
I'm interested in undervolting my nexus 4.
My primary cause is to get better battery life and reduce heat.
I use Franco Kernel.
Is undervolting -25 will be useful for my cause?
Undervolting -25 can cause problems?
I heard that if you undervolt too much your device can be damaged.
Thanks in advance to all the helpers!
Wassupdog said:
Hello!
I'm interested in undervolting my nexus 4.
My primary cause is to get better battery life and reduce heat.
I use Franco Kernel.
Is undervolting -25 will be useful for my cause?
Undervolting -25 can cause problems?
I heard that if you undervolt too much your device can be damaged.
Thanks in advance to all the helpers!
Click to expand...
Click to collapse
You won't even notice -25, people usually undervolt -100 or more. I don't think it can damage your phone, it can only get unstable in which case you need to find stable voltages for your device (CPU).
Dark Emotion said:
You won't even notice -25, people usually undervolt -100 or more. I don't think it can damage your phone, it can only get unstable in which case you need to find stable voltages for your device (CPU).
Click to expand...
Click to collapse
Thanks.
Did you ubdervolted ur phone?
Wassupdog said:
Thanks.
Did you ubdervolted ur phone?
Click to expand...
Click to collapse
Yes, my chip is "FAST" and I use these voltages:
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Dark Emotion said:
Yes, my chip is "FAST" and I use these voltages:
The phone is stable?
Do you feel the difference?
It slows the phone?
It reduce heat?
My chip is slow, what does it means?
Click to expand...
Click to collapse
I answerd with a few questions xD in the qoute ( im from the phone and it is a little bit hard to edit )
Wassupdog said:
I answerd with a few questions xD in the qoute ( im from the phone and it is a little bit hard to edit )
Click to expand...
Click to collapse
These voltages are stable on my phone. Some users use even lower voltages on their "FAST" chip.
On stock ROM I did felt that phone is not as smooth as with default voltages but on Purity ROM which I use now I don't feel huge difference.
It does reduce heat if you undervolt enough.
About chips: Basically, when Qualcomm makes the APQ8064 chip that you see in our Nexus 4, there are 4 different "types" based on how it meets their quality standards. These are Slow, Nominal, Fast, and Faster. The main difference IIRC between these types is how stable each can handle undervolting. CPUs that are "Fast" for example come pre-configured at a lower nominal voltage than a "Nominal" type CPU, and more so than a "Slow" type. (Does this account for how some people's phones generate less heat? Maybe, maybe not. IIRC, there's like only a -100mV difference between Faster and Slow out of the box, however Faster CPUs should be able to handle lower voltages than Slow-type.)
Dark Emotion said:
These voltages are stable on my phone. Some users use even lower voltages on their "FAST" chip.
On stock ROM I did felt that phone is not as smooth as with default voltages but on Purity ROM which I use now I don't feel huge difference.
It does reduce heat if you undervolt enough.
About chips: Basically, when Qualcomm makes the APQ8064 chip that you see in our Nexus 4, there are 4 different "types" based on how it meets their quality standards. These are Slow, Nominal, Fast, and Faster. The main difference IIRC between these types is how stable each can handle undervolting. CPUs that are "Fast" for example come pre-configured at a lower nominal voltage than a "Nominal" type CPU, and more so than a "Slow" type. (Does this account for how some people's phones generate less heat? Maybe, maybe not. IIRC, there's like only a -100mV difference between Faster and Slow out of the box, however Faster CPUs should be able to handle lower voltages than Slow-type.)
Click to expand...
Click to collapse
Do you recommned to me to undervolt?
I have a "Slow" cpu.
What voltages should I set (if you recommend to undervolt)?
Iwant to reduce heat and save battery.
Im using franco kernel and PA 3.99.
Wassupdog said:
Do you recommned to me to undervolt?
I have a "Slow" cpu.
What voltages should I set (if you recommend to undervolt)?
Iwant to reduce heat and save battery.
Im using franco kernel and PA 3.99.
Click to expand...
Click to collapse
If you want to reduce heat and save battery than undervolt your cpu.
Set -50 or -75 and use your phone (test it) for stability.
You can always set the stock voltages if you see that your phone becomes slower and you don't like it.
Dark Emotion said:
If you want to reduce heat and save battery than undervolt your cpu.
Set -50 or -75 and use your phone (test it) for stability.
You can always set the stock voltages if you see that your phone becomes slower and you don't like it.
Click to expand...
Click to collapse
Thanks!
Last question, how can i test stablity?
Wassupdog said:
Thanks!
Last question, how can i test stablity?
Click to expand...
Click to collapse
Just use your phone, play games, run some benchmarks, run StabilityTest app, take some pictures and or videos as well to see if there are any artifacts etc
Check some other threads about undervolting like this one: http://forum.xda-developers.com/showthread.php?t=2155495&highlight=undervolt
Read what users report.
Dark Emotion said:
Just use your phone, play games, run some benchmarks, run StabilityTest app, take some pictures and or videos as well to see if there are any artifacts etc
Check some other threads about undervolting like this one: http://forum.xda-developers.com/showthread.php?t=2155495&highlight=undervolt
Read what users report.
Click to expand...
Click to collapse
Thanks!
Wassupdog said:
Thanks!
Click to expand...
Click to collapse
What app are people using to undervolt?
I'm currently using SetCPU, but somehow i don't trust it to not mess with anything else, like the governor, ect; (any chance of that happening if i don't change anything?).
boomam said:
What app are people using to undervolt?
I'm currently using SetCPU, but somehow i don't trust it to not mess with anything else, like the governor, ect; (any chance of that happening if i don't change anything?).
Click to expand...
Click to collapse
I'm using Trickster mod with neo kernel.
Sent from my Nexus 10 using Tapatalk 4
Targaeryan said:
I'm using Trickster mod with neo kernel.
Sent from my Nexus 10 using Tapatalk 4
Click to expand...
Click to collapse
Trickster looks interesting.
As a question, how come you yourself use it over a more "common" app like SetCPU?
Related
Anyone have any clue how to set up SetCPU to maximize battery life on a Nexus one with A11 of the Sapphire ROM? There are so many settings and profiles and on demand/conservative/etc. and the profiles and advanced, etc.
Any ideas?
On-demand is way to go for battery life. It basically means it only uses the amount it needs to. So 245-998 means it cuold run less then 998 at low stress times.
I use profiles.
Charging, I turn max down to like 615 or so to keep heat down
Under 40% Battery, I go down to 615 to save battery
OVer 40C, I go down to 576 to get it back under 40C.
Also, some people underclock the CPU to maximize battery life. Just realize there is a give and take because a slower CPU = longer process time. A happy medium is probably the most efficient.
how do you know when the cpu runs faster? like can i open certain apps and see that it goes up? i always see mine at 384
One thing you need to know is that your CPU settings aren't what you think. Setting a "Screen Off" profile is pointless. Your phone idles at 386mhz already. When you set a MAX CPU speed you're telling your phone that it is not allowed to use more than that setting.
The only real thing you're going to get from SetCPU is a "Screen on" MAX.
I set mine at 800 and I got a significant battery life increase.
Cheeze[iT] said:
how do you know when the cpu runs faster? like can i open certain apps and see that it goes up? i always see mine at 384
Click to expand...
Click to collapse
Your CPU goes up when it's being used more. If you're on Ubuntu on your PC you can add a CPU monitor to the task bar. When you open something you can see the usage go up. You can do it on windows too but you have to have task manager open.
It's the same as any computer. Usage = battery loss.
just an FYI...
i have this set between 768-998MHz an i get exceptional battery life and its snappy as well. set on 'performance' and i unplugged the phone this morning at about ~7:30 ans i have 69% battery left under moderately-heavy usage
=] my phone just came back as a replacement NEW on monday. i unlocked the bootloader so i ad to pay them $55.. oh well
dumbestcrayon said:
One thing you need to know is that your CPU settings aren't what you think. Setting a "Screen Off" profile is pointless. Your phone idles at 386mhz already. When you set a MAX CPU speed you're telling your phone that it is not allowed to use more than that setting.
The only real thing you're going to get from SetCPU is a "Screen on" MAX.
I set mine at 800 and I got a significant battery life increase.
Click to expand...
Click to collapse
Can you elaborate? You are saying I should just set the overall max to 800 on my N1? Do I set it to ondemand and set on boot? Won't that slow the device down?
hah2110 said:
Can you elaborate? You are saying I should just set the overall max to 800 on my N1? Do I set it to ondemand and set on boot? Won't that slow the device down?
Click to expand...
Click to collapse
I've been playing with the overall speed as well. i turned mine down to the 600 range and it still feels fine. I'm still confused about the 3 options, the ondemand, userspace or performace... whats the difference? I don't ever feel like it clocks down?
Cheeze[iT] said:
I've been playing with the overall speed as well. i turned mine down to the 600 range and it still feels fine. I'm still confused about the 3 options, the ondemand, userspace or performace... whats the difference? I don't ever feel like it clocks down?
Click to expand...
Click to collapse
http://en.m.wikipedia.org/wiki/Dynamic_frequency_scaling
So my battery life pretty much sucks and i've been looking for a way to improve it a bit, which is how i found this thread.
I downloaded SetCPU already but which settings do i choose to maximize my battery life?
This is how i have it now:
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Dumbestcrayon said setting max to 800 worked well so i tried but i cant get it exactly on 800. Also, profiles are blank right now since i dont want to choose anything that could stress my phone.
Any help would be awesome
PhantomRampage said:
So my battery life pretty much sucks and i've been looking for a way to improve it a bit, which is how i found this thread.
I downloaded SetCPU already but which settings do i choose to maximize my battery life?
This is how i have it now:
Dumbestcrayon said setting max to 800 worked well so i tried but i cant get it exactly on 800. Also, profiles are blank right now since i dont want to choose anything that could stress my phone.
Any help would be awesome
Click to expand...
Click to collapse
There's not much you can do with SetCPU to improve battery life. I have mine set to 768 at all times and it helps a little. Understand that you're not going to change much. The only way to improve battery life is to not use your phone. Other than that you're pretty much going to get the same results. A lot of people will argue but common CPU knowledge shows other wise.
dumbestcrayon said:
There's not much you can do with SetCPU to improve battery life. I have mine set to 768 at all times and it helps a little. Understand that you're not going to change much. The only way to improve battery life is to not use your phone. Other than that you're pretty much going to get the same results. A lot of people will argue but common CPU knowledge shows other wise.
Click to expand...
Click to collapse
While he may call himself/herself the dumbest crayon, it isn't much so.... Set cpu was made to kill your battery while trying to scavange whatever is left.. it is more intended, now, for overclocked usage. Not stock. Cause as noted.. this is not really for regular use as it only improves a little. What matters is the kernal being used. This is where the engine for everything that you is kept, to work with the processor.
After this, set cpu is a show item...
So just to be clear. I was reading that the HTC Incredible will be underclocked to 768. Is it possible to underclock to 768mhz with just SetCPU, or does a modified kernel have to be flashed to see any battery performance benefit?
thanks.
ghostrida said:
So just to be clear. I was reading that the HTC Incredible will be underclocked to 768. Is it possible to underclock to 768mhz with just SetCPU, or does a modified kernel have to be flashed to see any battery performance benefit?
thanks.
Click to expand...
Click to collapse
yes you can underclock you would set your Max speed to that speed and don't use profiles.
I know that this tool isn't a good indicator of performance... but when I see other people with the EVO getting 1200+ and I am at 800-900, I am starting to wonder if there is a setting wrong. My phone occasionally feels sluggish. Any idea's what the cause could be? using an AOSP rom with Tiamat Kernel
- Just realized I wasn't in Q&A forums Sorry! - please delete if needed
Stuke00 said:
I know that this tool isn't a good indicator of performance... but when I see other people with the EVO getting 1200+ and I am at 800-900, I am starting to wonder if there is a setting wrong. My phone occasionally feels sluggish. Any idea's what the cause could be? using an AOSP rom with Tiamat Kernel
Click to expand...
Click to collapse
Good question!
Ive always wondered why some score so low on good combos.
I'm on CM nightly rc3 build 18 with savgzen 1.0.0 cfs-havs and scoring very well
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new quad you will get low scores
imho quad and all the other benchmark test mean nothing
CheesyNutz said:
new quad you will get low scores
imho quad and all the other benchmark test mean nothing
Click to expand...
Click to collapse
I agree when comparing to other phones... but 2 phones of the same model should get similar scores right?
Stuke00 said:
I agree when comparing to other phones... but 2 phones of the same model should get similar scores right?
Click to expand...
Click to collapse
Have you ran it off of a fresh reboot?
I find my best scores were when I rebooted let it sit for 3-5 min after reboot, and then fire it up.
Mark_in_Tulsa said:
Have you ran it off of a fresh reboot?
I find my best scores were when I rebooted let it sit for 3-5 min after reboot, and then fire it up.
Click to expand...
Click to collapse
Trying it again after the phones been on a few minutes.
I used to use SETCPU and I thought maybe that screwed things up
If you want to increase scores why don't you put your Max frequency at 1190 and min at 1190 with setcpu. High scores are a thing of the past.
~ d3rk
dirkyd3rk said:
If you want to increase scores why don't you put your Max frequency at 1190 and min at 1190 with setcpu. High scores are a thing of the past.
~ d3rk
Click to expand...
Click to collapse
That is with my CPU at 1190. I am not trying to get a high score, but a score my phone should be able to get, you know? I see someone with an EVO get 1500 and then I am thinking something is wrong with my phone... I have the same phone..
Stuke00 said:
That is with my CPU at 1190. I am not trying to get a high score, but a score my phone should be able to get, you know? I see someone with an EVO get 1500 and then I am thinking something is wrong with my phone... I have the same phone..
Click to expand...
Click to collapse
Putting stock in scores is foolish though. 936 does seem a Tad bit low for sure. My set up is cm7 #36, tiamat kernel 3.3.5, JIT on, setcpu 1113 Max, 422 min smartass governor. I just ran a linpack and got 37mflops and 1200 in benchmark. This is the same set up I usually run on any rom or kernel. I try not to clock so high because it just drains battery. My evo actually can perform flawlessly clocked at even 998mhz. The only thing I notice different is that scores change and I don't really take a performance hit. Underclocking is the new overclocking lol. My last suggestion would be to play around with different kernels to achieve what you desire. Try savage zen!
Edit: just ran these 2 test just for you right now. Same results and I'm using same kernel you are.
~ d3rk
Run, it once, and then run it again right after w/out quitting. The if you run it multiple times (at least on my phone), all subsequent scores are on par with the second one which is usually 1-300 more than the first. Won't mean anything any different, but at least you might get some higher scores.
Also, you might need to try some different kernel combinations as well as different clock speeds. Mine usually does fine at 998 sometimes even at 921, but if I go too high it will start to slow things down. If you're not getting good results at 1190, try backing it off one setting at a time and see if you can get improved scores.
As far as comparing to other phones, even of the same make/model, you can't really do that. As long as they're in the same ball park, within a couple hundred, you're probably OK. Every phone reacts differently.
It also depends on the version of quadrant. You def can't compare diff phones running diff versions. I usually don't use it to compare to other phones, just diff setups on my phone. I know if I'm getting 1200 avg and then I all of the sudden flash a ROM and kernel and can't break 800 that something is probably wrong.
The most important thing is how the phone feels though. The fact that you say it feels sluggish leads me to believe you might need to try a diff kernel or see if something is eating up your CPU. Also, when you're over clocking, the min clock speed can effect your scores just as much as the max speed.
Ya give savage a go.
Kernel CPU setting:
Ondemand governor
Min 245
Max 998
My Device scores high runs smooth battery drain not a problem.
I just tested mine and got 1326. With these settings.. CM7 Nightly 36 with 2.6.37.6-Tiamat -v3.3.5 kernal.
Governor - Conservative
Min - 384
Max 1036
Okay, so i was browsing through the results of the Antutu benchmarking application, and I saw this guy, he had a CPU freq of 844 freq. Is that even possible? Just wondering
for reference, hes number is 887243
It is possible, within 5 or 10 minutes. As soon as the run game, the phone goes to restart (((
PokMahPok said:
Okay, so i was browsing through the results of the Antutu benchmarking application, and I saw this guy, he had a CPU freq of 844 freq. Is that even possible? Just wondering
for reference, hes number is 887243
Click to expand...
Click to collapse
Overclocking the phone to even 787Mhz makes it quite unstable. That's why clock speeds above 806Mhz are not included in most kernels...but even if you do somehow overclock to 844Mhz I don't think the phone would survive for more than 15- 30 mins not to mention lots of heating up. In short-such speeds are not feasible for daily usage
Sent from my LG P500 using XDA Premium
Press thanks button if I helped you in any way
otrazhenye said:
It is possible, within 5 or 10 minutes. As soon as the run game, the phone goes to restart (((
Click to expand...
Click to collapse
> true.. 748 will be much stable.. mine can run 806.. but sometimes it reboot.. it can also handles 787.. except! when u play fruit ninja it crashes
PokMahPok said:
Okay, so i was browsing through the results of the Antutu benchmarking application, and I saw this guy, he had a CPU freq of 844 freq. Is that even possible? Just wondering
for reference, hes number is 887243
Click to expand...
Click to collapse
I've overclocked upto 864(Franco's old kernels 19.4)etc they're outdated now! but just as others said my phone used to crash up in 10Mins or slow with misplaced screen!
Sent from my LG-P500 using Tapatalk
PokMahPok said:
Okay, so i was browsing through the results of the Antutu benchmarking application, and I saw this guy, he had a CPU freq of 844 freq. Is that even possible? Just wondering
for reference, hes number is 887243
Click to expand...
Click to collapse
you meant this guy?
sealtongue said:
Here im sharing to all LG P500 lovers my score when i once using Noejin's ROM
void #forever tested 2011 july 19. Wonderful work to the 3 equally unselfish modders having shared their work to us.
Now im testing DynamiteRom and trying to squeeze as much tweaks I can get from XDA, hopefully I be as successful as void #forever.
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viv_jen said:
you meant this guy?
Click to expand...
Click to collapse
> if that what he was pointing out.. clearly the answer is there in the quoted sentences.
787
morph7777777 said:
Overclocking the phone to even 787Mhz makes it quite unstable. That's why clock speeds above 806Mhz are not included in most kernels...but even if you do somehow overclock to 844Mhz I don't think the phone would survive for more than 15- 30 mins not to mention lots of heating up. In short-such speeds are not feasible for daily usage
Sent from my LG P500 using XDA Premium
Press thanks button if I helped you in any way
Click to expand...
Click to collapse
lol my phone is stable at 787 and sometimes even 806 and it works AWESOME
opera38205 said:
lol my phone is stable at 787 and sometimes even 806 and it works AWESOME
Click to expand...
Click to collapse
On which ROM, may I ask? And is it stable while playing ANY game?
Sent from my LG P500 using XDA Premium
Press thanks button if I helped you in any way
If he's really hardcore, maybe he opened it up and used a fan or something.
Like the other ones written bevor me. Overclocking the O1 above 786 Mhz are like Gambling. Every CPU are a litle bit Unique, so nobody knows what kind of Frequency youre once are able to handle.
For Exemple iam running myone stable @ 320/787. But every Step Higher will be results in FCs and Reboots.
So the only way to go is to OC youre Phone step by step to find out what kind of Frequency youre CPU can handle
I once accidentally left my phone on 787mhz performance after benchmarking, and after a few days my phone crashed and would not boot into android, scared the **** out of me, but after about 10 mins it was fine, i quickly found out why this happened after. Overclocking your phone to 787mhz adds a lot of extra heat to your phone, and unless you live in a freezer or Antarctica and never keep your phone in your pockets I would not recommend over-clocking it that high.
If your new to the whole overclocking things, youtube extreme overclockers and you will realise would needs to be done to cpus to overcome the excessive heat.
deniso177 said:
I once accidentally left my phone on 787mhz performance after benchmarking, and after a few days my phone crashed and would not boot into android, scared the **** out of me, but after about 10 mins it was fine, i quickly found out why this happened after. Overclocking your phone to 787mhz adds a lot of extra heat to your phone, and unless you live in a freezer or Antarctica and never keep your phone in your pockets I would not recommend over-clocking it that high.
If your new to the whole overclocking things, youtube extreme overclockers and you will realise would needs to be done to cpus to overcome the excessive heat.
Click to expand...
Click to collapse
OTh lol i seen one of the videos, they overclock one pc so much they use liquid nitrogen to cool the pc itself.
Sent from my LG-P500 using xda premium
When I go beyond 800 system crashes and Phone restarts
In theory our CPU could be OC to max 878 MHz. But i never heard anyone get that freq.
voyager20021 said:
In theory our CPU could be OC to max 878 MHz. But i never heard anyone get that freq.
Click to expand...
Click to collapse
yes it is possible. but the phone will heat up like mad.
Sent from my LG-P500 using xda premium
Mine runs stable at 806 in almost all ROMS i tried (except the ICS ones because it dosent have that frequency )
Yesterday I have overlooking to 806 and i have a black screen with message : arm6 crashed ...
Please reboot ...etc
tombost said:
Yesterday I have overlooking to 806 and i have a black screen with message : arm6 crashed ...
Please reboot ...etc
Click to expand...
Click to collapse
not all p500 are stable at 806mhz fyi.
Sent from my LG-P500 using xda premium
overclock
morph7777777 said:
On which ROM, may I ask? And is it stable while playing ANY game?
Sent from my LG P500 using XDA Premium
Press thanks button if I helped you in any way
Click to expand...
Click to collapse
sometimes i go into the freezer (i have a really really big one) and OC my phone to 864 i get AMAZING benchmarks with gtr
usually my stable speed is 787 on new cm7 roms and 806 on mik's cm7 rom
After reading this:
http://forum.xda-developers.com/showthread.php?t=2052496
I found I got the "faster" type. As I understand it, this means my cpu has less power/frequency needs, and so, because the stock kernel is configured to manage any of the possible cpu binnings, the settings are probably not the optimal ones for my particular unit. So, does this mean my phone is running at a higher voltage than it needs? Should I undervolt it? How?
While faster CPU binning does mean that you CPU can run more stable at a lower voltage, UV doesn't save you that much of battery.
Most of the battery goes to the screen. The least I have seen around is 50%. Then the next culprit is the radio. And you also have RAM, storage, etc. UV might give you around 1% more battery or so.
You can try UV if you want, but I don't think you need, or should do it.
Sent from my Nexus 4 using xda app-developers app
KyraOfFire said:
While faster CPU binning does mean that you CPU can run more stable at a lower voltage, UV doesn't save you that much of battery.
Most of the battery goes to the screen. The least I have seen around is 50%. Then the next culprit is the radio. And you also have RAM, storage, etc. UV might give you around 1% more battery or so.
You can try UV if you want, but I don't think you need, or should do it.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Actually that's not the in my phone. I don't know what I'm doing wrong but AndroidOS, Google Services or MediaServer usually show up as the battery top drains. I have to say I'm on wifi most of the time and the screen time is usually around 1 hour per day. I'm using all the sync features, google now etc, so I I thought reducing the 384Mhz voltage would have some impact
hallucynogenyc said:
Actually that's not the in my phone. I don't know what I'm doing wrong but AndroidOS, Google Services or MediaServer usually show up as the battery top drains. I have to say I'm on wifi most of the time and the screen time is usually around 1 hour per day. I'm using all the sync features, google now etc, so I I thought reducing the 384Mhz voltage would have some impact
Click to expand...
Click to collapse
Presumably you're not talking about under volting, but under clocking?
Sent from my Nexus 4 using xda premium
No, I'm not. Looking at my cpu modes graph, it makes sense to me that reducing the voltage at which the cpu runs at 384mhz would reduce the consumption:
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While it is debatable whether you will save any noticeable amount of battery by undervolting, I have found it to significantly reduce the heat produced by the CPU. Our SOC's are great undervolters, so I don't see any reason NOT to undervolt.
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heat = energy, I highly doubt you can feel a difference in temperature but not in battery lol. How are you guys undervolting? I tried setCPU but it doesn't work, is a custom kernel needed?
KyraOfFire said:
While faster CPU binning does mean that you CPU can run more stable at a lower voltage, UV doesn't save you that much of battery.
Most of the battery goes to the screen. The least I have seen around is 50%. Then the next culprit is the radio. And you also have RAM, storage, etc. UV might give you around 1% more battery or so.
You can try UV if you want, but I don't think you need, or should do it.
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I think the battery usage by the screen that is being reported includes more than just the amount of battery used to power the screen. Due to project butter, touching the screen ramps up the CPU to high frequencies, like 1026 - 1512 GHz, making the phone buttery smooth yet sucking the life out of it's battery. In other words, the screen usage includes its touch boost processing usage as well, which in its self is allot of usage. Basically, UV should improve battery life significantly.
Still noone tells me how to do it xD
hallucynogenyc said:
Still noone tells me how to do it xD
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You need to install a custom kernel that allows undervolting then use an app such as system tuner to undervolt.
Mine shows as a nominal CPU and I could under volt quite a bit. Makes a nice difference to heat and battery life is noticeably better.
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Okay, I thought rooting would be enough Honestly, I'm liking the stock kernel overall, what's the closest to stock kernel that allows undervolting I can find? If there's no such thing, what do you recommend me?
Thanks in advance
The easiest way, with the minimun amount of work, would be flashing motley kernel. UV by default and you faster binning CPU is fully accounted for.
http://forum.xda-developers.com/showthread.php?t=2021437
Trinity kernel also UV by default. He has his own website here
http://forums.derkernel.com/index.php/topic,47.0.html
Download the zip file, flash it in recovery, wipe cache/dalvik and you're good to go.
You can also try other kernel/ROM that support UV. Most likely you will need a control app.
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What's a good level to undervolt to I'm on faux's 001 have a nominal cpu and right now I'm -100 MV should I UV more? My phone is still completely stable at this level
mbucks911 said:
What's a good level to undervolt to I'm on faux's 001 have a nominal cpu and right now I'm -100 MV should I UV more? My phone is still completely stable at this level
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Every phone can handle different uv levels, mine seems to be -150, and I have "fast" cpu. You can try higher but don't set the voltage to be "on boot" or else you'll get the bootloop or freeze.
: what is a stable kernel to overclock my N7 to 1.8 GHz or 2.0 ghz and will work well with my stock kernel .
I am using now motley v3+ kernel but the maximum frequency is 1.6 ghz
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With the trinity kernel you can over clock up to 1.7, also there's a faux kernel that you can go up to 1.7 but its useless anyway, your tablet won't perform better because you over clock it.
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I guess you just really want to kill the tablet, huh? Even if it could clock that high without permanently damaging the silicon, you'd be looking at it being extremely unstable.
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On 4.1 there was a kernel that let you OC to 2.1GHz but that hasn't been updated to 4.2 and proally never will. On 4.1.2 with CNC and That kernel I got like 7000 in quadrant
Sent from my Nexus 4 @1.72 GHz on Stock 4.2.2
It performs better already since I oc to 1.6 ghz!
Why you say that
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fish droid said:
It performs better already since I oc to 1.6 ghz!
Why you say that
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Better in performance of course. Over clocking the tablet can deplete it's life span. Battery life will take a huge hit too.
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For me overclocking is totally useless. You won´t recognise a difference between no oc and oc... only in benchmarks, but your battery is draining faster and it´s getting hot
Curlie said:
For me overclocking is totally useless. You won´t recognise a difference between no oc and oc... only in benchmarks, but your battery is draining faster and it´s getting hot
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overclocking to higher frequencies will make the battery drain faster and it will get it hot but I only overclocked 300 MHz to reach 1.6 ghz and it's perfect ,it operates normally and it never got hot . I also changed the GPU frequency to 533 by trickster mod .
scream4cheese said:
Better in performance of course. Over clocking the tablet can deplete it's life span. Battery life will take a huge hit too.
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this is partially right I think it will effect the battery when the kernel request those extra 300 MHZ but it will also save the battery since I made the minimum frequency to 100 MHZ .
But why do you do it? For me there´s no notieceable difference.. only in benchmarks and i don´t care about benchmarks. For me franco kernel is best
fish droid said:
It performs better already since I oc to 1.6 ghz!
Why you say that
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There's a principle called the law of diminishing returns and it applies perfectly to this situation. The reason that kernel devs don't include higher frequency steps is that there is no real benefit. At higher frequencies, you introduce lag, random reboots, boot loops and general instability. Performance and frequency are not a linear corollary. Additionally, you exponentially shorten the life of the hardware by clocking too high. 1.6 is safe for most, 1.7 for some, and 1.8 for very few.
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najaboy said:
There's a principle called the law of diminishing returns and it applies perfectly to this situation. The reason that kernel devs don't include higher frequency steps is that there is no real benefit. At higher frequencies, you introduce lag, random reboots, boot loops and general instability. Performance and frequency are not a linear corollary. Additionally, you exponentially shorten the life of the hardware by clocking too high. 1.6 is safe for most, 1.7 for some, and 1.8 for very few.
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I think your reply is the most logical one since everyone does not know what they are talking about but I was I just asking for experimental purpose not for permanent use .
what are the kernels that will allow me to reach 1.9GHZ or 2.0GHZ on stock rom 4.2.2?
Curlie said:
But why do you do it? For me there´s no notieceable difference.. only in benchmarks and i don´t care about benchmarks. For me franco kernel is best
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franco kernel is stable . and also motley very safe and stable . and ofcource there is a difference "curlie" there is no lagging at all even when I customize my nexus with a different launcher . I don't care about benchmark also its irrelevant with the actual performance but sure there is a big difference .
but why do you choose franco kernel ?
IRX120 said:
On 4.1 there was a kernel that let you OC to 2.1GHz but that hasn't been updated to 4.2 and proally never will. On 4.1.2 with CNC and That kernel I got like 7000 in quadrant
Sent from my Nexus 4 @1.72 GHz on Stock 4.2.2
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I get on 4.2.2 7000 scores.
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My man, you seem hell bent on frying your n7! Lol
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Tommy-Geenexus said:
I get on 4.2.2 7000 scores.
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A bit over 7000 Quadrant score on 4.2.2 here too, OC to 1.6 and still able to UV about 100 across the board and no different in stability, maybe i'm lucky one who got variant 3 of Tegra 3 here.
What I got from OC my device? It's run much more smother than when i'm at 1.3 like in facebook app for example at 1.3 I'm not able to scroll through feed really smooth but at 1.6 it's really smooth.
Concern about negative hit to battery life? I'm notice a little hit here as i'm get about 7 hours screen-time at 1.3 and about 6.5 hours at 1.6 and to me that acceptable, maybe due to UV that make it not much different.
Heat? A little lower if not the same temperature as when it's running at 1.3 again due to under voltage I think.
But however this is just my personal experience.
Sent from my Nexus 7 using xda premium
If you can build from source, just add in the frequencies to the tegra3_dvfs.c and other related files. But due to several obvious reasons mentioned already in this thread, I would never do that ever.
Franco Kernel FTW!