yashsingh1/xdaforums huggingface dataset:
[Nexus 4 General] gorilla p:
These are my current UV settings. (Fast binned CPU). I haven't played around with them much at the higher speeds...

Using AK kernel, Ondemand governor, intelliplug, disabled Google Now and OK Google voice activation, disabled 4G, disabled s2w, battery life is excellent with this and current optimizations.

All optimizations are available for download from my download site, bit.ly/makostuff. AK kernel, optimized Dalvik patch (many newer AOSP Roms require CM version), new Qualcomm Adreno drivers/binaries, AIO LTE enabler (w/ hybrid 33/98 radio) and Killjoy Tweak Script (optional).
[Nexus 4 General] TheQuarterMile:
Does Undervolting cause excessive heating?
[Nexus 4 General] RASTAVIPER:
It's the opposite.

Less power used, less heat produced.

Unleashed by my Nexus 4
[Nexus 4 General] gorilla p:
For those that aren't sure how UV can save battery life, since for example 192mhz and 384mhz freqs only have a 25mv difference in voltage...

A: The formula for power consumption is: P = f * c * V ^ 2

Where: P = power consumption, f = frequency, c = capacitance and V = voltage

So: since c is constant in this case, and we'll assume you've used the lowest UV possible (600mV)

At 304mhz: P = 304 * c * 600 ^ 2

At 192mhz: P = 192 * c * 600 ^ 2

This means that 304mhz uses approximately 1.58 times more power than 192mhz over the same time.
[Nexus 4 General] TheQuarterMile:
Can anyone share their stable UV table on HellsCore? Fast bin...
[Nexus 4 General] gorilla p:
I'm using AK, but I'm fast binned. So u could prob use mine as a reference
[Nexus 4 General] RASTAVIPER:
B45

slow bin

Unleashed by my Nexus 4
[Nexus 4 General] SeanInToronto:
I've switched to using the latest overclocked and undervolted Mirage kernel, with great results. Overclocked to 1.7 GHz and undervolted by roughly 100mV across all frequencies. I'm not sure of the exact voltage table used. My CPU is also binned nominal.
[Nexus 4 General] FalenDemon:
And what ur average SOT?

Отправлено с моего Nexus 4 через Tapatalk
[Nexus 4 General] Defferex:
HellsDoctor R12.

10+ SOT.
[Nexus 4 General] Mashed_Potatoes:
You wish....
[Nexus 4 General] urim225:
+1
[Nexus 4 General] intoinside:
Hi all, this is my first post...and there are my settings

Mhz mV

384	766

486	791

594	816

702	841

810	867

918	880

1026	905

1134	931

1242	956

1350	981

1458	1005

1512	1018

CPU Fast

Franco Kernel r208

Rom Purity 20140607

I will use these settings for some day, checking for stability, performance and battery saving...

Bye
[Nexus 4 General] simms22:
you guys do realize that undervolting doesn't save enough battery to make any difference, right? undervolting is helpful, but not for battery life. undervolting is helpful in lowering your cpu temps a little. but battery life is mostly determined by the way you personally use your device, how you set it up, what apps you install, and very much the quality of your phone/data connection.
[Nexus 4 General] gorilla p:
When done properly I haven't noticed any negative effect, I've noticed minor battery savings, I've noticed a cooler battery (which contributes to battery life and overall longevity)

<br> The formula for power consumption is: P = f * c * V ^ 2

Where: P = power consumption, f = frequency, c = capacitance and V = voltage

So: since c is constant in this case, and we'll assume you've used the lowest UV possible (600mV)

At 304mhz: P = 304 * c * 600 ^ 2

At 192mhz: P = 192 * c * 600 ^ 2

This means that 304mhz uses approximately 1.58 times more power than 192mhz over the same time. </br>

So for the same reason that lower frequencies reduce battery drain, lower voltages do as well.

For example, you may have 162MHz@775mv. Reducing it to 700 will result in a saving of approximately 9.7%.

Sent via Mental Telepathy
[Nexus 4 General] simms22:
well, in theory it might appear so. but in reality, it wont add 15 minutes to your real screen on time. reducing screen brightness will save you more battery. about heating up, cpu and battery, itll help some.
[Nexus 4 General] theelle:
how did you obtain that screen?

i've actually a cm11 (last nightly) with default cm kernel, is that possible undervolt? if yes, how?
[Nexus 4 General] icu64:
Has anyone ever gone under over a 150 undervolt? And in all honesty no matter what I do on Franco kernel I always get the same battery life unless I under clock, this goes with ever other kernel I try, even trenity kernel
[Nexus 4 General] Mashed_Potatoes:
Nominal CPU, Android L

162Mhz - 725mV

270Mhz - 750mV

384Mhz - 775mV

486Mhz - 825mV

594Mhz - 850mV

702Mhz - 875mV

810Mhz - 925mV

918Mhz - 950mV

1026Mhz - 975mV

1134Mhz - 1025mV

1242Mhz - 1050mV

1350Mhz - 1075mV

1458Mhz - 1087mV

1512Mhz - 1100mV

1620Mhz - 1150mV

1728Mhz - 1200mV

Suggestions? Is the 200Mhz OC worth it?
[Nexus 4 General] RASTAVIPER:
Oc maybe help with a few games or with Antutu scores.

You wont see any difference in all other activities as most of them don't even need more then 800mhz. Music for example can even work with 81mhz :)

Unleashed from Onda v957m on TDT
[Nexus 4 General] Mashed_Potatoes:
I've put it back to 1.5Ghz i don't have any games or do benchmarks :good:
[Nexus 4 General] astrall:
Fast binned chip.

PA3+

Harsh Kernel Feb. 24 build (-100 pre-UV)

init.d UV script -75

1.5 Max CPU

STABLE

Sent from my Nexus 4
[Nexus 4 General] curtzxion:
Is it really necessary to undervolt all state or just undervolt the lowest one? Because usually phone spend most of the time in the lowest state

Sent from my Nexus 4
[Nexus 4 General] greenninjas:
Bump on that last post, is it necessary to undervolt all the freqs for smooth scaling, or can we just UV the most frequent ones? Also, anyone have any stable UV values for a nominal chip? Looks like I'm not so lucky to have a fast chip D:
[Nexus 4 General] Ace42:
Mysterious pacman

Faux 007m

-175 volt

Fast bin

4hrs min of screen time, 7 was highest( posted in faux thread)
[Nexus 4 General] Water Dispenser:
wait, just a newb.

what does the chip actually means? for being fast or faster?

and got a problem here.

cm10.1 20130301

franco kernel r93

when i change the voltage of the 1512 frequency, my phone restarts.

what am i doing wrong?

Sent from my Nexus 4
[Nexus 4 General] drmclove69:
Faster will most likely be able to handle higher undervolting than let's say nominal or fast, if you get a reboot means it can't handle it so try undervolting less on 1512 in your case. Don't undervolt too much or ur phone will loose stability and possible app fc's.
[Nexus 4 General] :
With a faster binned CPU. I guess that's not the limit but I don't have the time to figure out the very lowest stable values.
[Nexus 4 General] Sliming:
Can any of you guys give me some sort of idea of the benefits of uving/ocing. Like how much much screen on time would I gain?
[Nexus 4 General] Herminator19640927:
I think it's enough to undervolt the most frequent states. 384 (304) MHz, 1 GHz and 1,5 GHz. But you can easily undervolt all states by setting the offset for all states (i.e. with Trickster Mod. I recommend System Tuner Pro. You can save your stable UV settings and easily apply them again after a ROM/Kernel update).

You can take my Voltages in the OP and add about 12,5 to 25 mV. Try if it's stable with StabilityTest and if not add some extra mV.
[Nexus 4 General] meangreenie:
Does anyone know of a 422 kernel with stock 422 colours with under volting?

I can only find ones that use 421 colours, checked by eye and 'display calibrator'.. Blue gamma @1.3, yuck!
[Nexus 4 General] Water Dispenser:
many thanks for the info drmclove69 :D

and based on other posts here on the thread, i can undervolt safely on the frequencies below 1512 except for 1512.

its good whenever i dont use my phone. ill experiment on this
[Nexus 4 General] Water Dispenser:
hows your nexus4 with those voltages?
[Nexus 4 General] thebrainkafka:
AW: [UV] Nexus 4 UV Thread - POST YOUR UNDERVOLTING RESULTS - GET A (BATTERY)LIFE :)

Which is the best and simply tool for UV?

Thx
[Nexus 4 General] Herminator19640927:
Read the OP :)
[Nexus 4 General] thebrainkafka:
AW: [UV] Nexus 4 UV Thread - POST YOUR UNDERVOLTING RESULTS - GET A (BATTERY)LIFE :)

THX, didnt see this in op.

Do i need another kernel to change voltages?

If yes which would you recommend. Im on cm with a faster cpu
[Nexus 4 General] ownzordage:
Newb question: Can I under-volt with the AOSP stock kernel?
[Nexus 4 General] Herminator19640927:
You need a custom kernel like motley's, matr1x, franco's, etc. Choose the one that fits you best. I'm on motley's right now and I like it.
[Nexus 4 General] 3dawg:
What are the stock voltages for the Nexus 4?
[Nexus 4 General] wathefak:
I think this is the default
[Nexus 4 General] Herminator19640927:
Sick, so I undervolted my 1512 MHz state by -200 mV :D
[Nexus 4 General] kennynguyen20:
im on PA 3+ and Faux's kernel, any recommended UV?
[Nexus 4 General] younix258:
Simple, yes.

No one can tell you how much your phone will be able to do.. Just turn OFF set on boot and test different settings.
[Nexus 4 General] ch96li:
PUB build 5 and franco r93, I use -115mV as my daily driver, I've been able to go as low as -150mV if my battery is above 35% but once battery starts to drop, I get some hard resets.
[Nexus 4 General] younix258:
Yes voltages vary as the battery goes down.
[Nexus 4 General] SneakyGuyDavid:
on franco with :

mhz | mv

384 - 700

486 - 720

594 - 735

702 - 765

1026 - 850

1188 - 900

1350 - 930

1512 - 970

its not the lowest i could go , but its still pretty low compared to stock and its pretty stable
[Nexus 4 General] persheshhater:
Best way to test stability is when battery is under 15% and then u gotta see how low u can go.
[Nexus 4 General] SneakyGuyDavid:
ahh true , i remember one time i let my battery get to like 31% one time when i undervolted too low and i lost ALL app data , i still had all my apps but no data , i had to relog on all my accounts and all local game data was lost , that was bad . thats the only thing that kept me from undervolting for a while
[Nexus 4 General] demon507:
I've a faster bin CPU and I've UV`ed -150mv..

I'm on faux's kernel on top of paranoid android..

Check battery life in screenshot... (First cycle after flashing)

Wifi & mobile data on all the time..(mostly WiFi)

Done benchmark twice...

And I'm not just starting my screen I'm using it... :D :p
[Nexus 4 General] vagos696:
Fantastic numbers. Screen is dimmed or in auto?

Any other tips to share? With Franco r97 and -100mV with stock ROM I have actually less battery than unrooted in the first place.

Sent from my Nexus 4
[Nexus 4 General] namttn:
What version of kernel r u using ?
[Nexus 4 General] SneakyGuyDavid:
at the moment r97
[Nexus 4 General] demon507:
Display settings are on auto brightness
[Nexus 4 General] namttn:
Any lag problem appear after u set uv as those values? I think it s very low. A few day ago , 1 set it down 125 and my device was lag and auto-boot.

so, i had to reflash rom :crying:

---------- Post added at 04:52 PM ---------- Previous post was at 04:23 PM ----------

someone shows me the stable UV for Franco r100 ? it seems that battery life of r97 is better than r100, certainly with the same UV.
[Nexus 4 General] coolnow:
For some reason, using Franco's app seems to cause loads of kernel wakelocks. Battery lasts not even 8 hours, steadily decreasing all the time, never goes into deep sleep. Doesn't happen on Faux or stock. Tested on r97 with -125 UV, and custom Gamma settings.

I did come across a problem though, it seemed i couldn't change the governer through the app so i forced it into ondeman through CM's performance options. Maybe the app is conflicting with that. Going to wipe, flash fresh rom and r100 kernel and try again.
[Nexus 4 General] kennynguyen20:
Im on PA 3+ and Faux 009 kernel, UV -150, everything works great, no lag at all even when play games. Very happy, having a great battery life as well, could easily last me at least 4 hours on screen.
[Nexus 4 General] Ƶero:
CM 10.1 11.03 + franco r102:

really stable settings for me, running antutu bechmark without fail, lower settings cause close of app without error, also stability test works without problems.

took me 1 day to find out those settings for me hope they may help someone.

ps: those settings worked for me from version r96, r97 r100 and r102 so i think they gonna work for other versions too,

i also seen the values from SneakyGuyDavid and they just give me a random reboot so i guess those settings don't work for all ppl but hopefully mine work for a few ppl
[Nexus 4 General] coolnow:
Reinstalled PA, Franco's r102 and UV by 125 for most and 150 for a few values, with max clock locked to 1300MHz which is UV to around 950.

Brightness about 30%, browsing and watching a few vids and sending about 40 texts. After 2.5 hours of screen time, battery fell 30%. I think that's awesome. No partial/kernel wakelocks now.

Using WIFI, and battery fell 30%, from 85% to 55%.
[Nexus 4 General] namttn:
I sometimes play game,so It seems that CPU almost acts by minimum frequency. I think it mainly effects on battery life of the device. Do u know how to set Governor control in Franco app ? Pls show me.
[Nexus 4 General] coolnow:
It seems you're on conservative. In franco's app, go to Frequencies/Voltages and the 3rd option down "current governer" controls it.
[Nexus 4 General] Goog1e Phone:
Is there an app that you guys use for stability test? I'm not sure how low I can go since my phone hasn't rebooted yet. But then again, I haven't used my phone intensely.

Nm, I'm an idiot. I found the app. How long do you guys usually test for? I went 20+ minutes with no errors so just decided to manually stop the test. Should I have waited longer?

Sent from my Nexus 4
[Nexus 4 General] Herminator19640927:
I tested for several hours (5, I think). It's the same with Prime95 on your PC, errors can still occur after 20 mins of testing. You have to test for some hours. Fatal errors will most likely occur in the first few minutes.
[Nexus 4 General] younix258:
Yes, you should go 3 hours non stop per step... Or you could just find the crashing point and then increase by like 50mV and call it a day
[Nexus 4 General] :
This is pretty low I think, works fine.
[Nexus 4 General] younix258:
Wow finally someone with a lower UV than me. Props for the crazy uv man.

Edit: are these voltages still stable at very low battery levels? And through benchmarks?
[Nexus 4 General] noobOTT:
My phone's being a dicke right now. It's restarting every 30s and I'm UVing to 800mV.
[Nexus 4 General] younix258:
If its restarting, its probably not stable at your current voltage settings. Pull em up a bit
[Nexus 4 General] noobOTT:
It's only stable @ min 850mV. I go down to 750mV on franco's kernel.
[Nexus 4 General] Herminator19640927:
Wow MarcPlusTwo and SWEagle these are really low voltages. Which chips you've got? Faster?
[Nexus 4 General] noobOTT:
Can someone explain this "chip" thing? I can't seem to find it in tricksterMod.
[Nexus 4 General] Herminator19640927:
Read my OP and you'll get it.
[Nexus 4 General] noobOTT:
I got a "ACPU PVS : 3" it doesn't show fast, nominal or whatever.

Edit: Apparently I have a "fast" chip (1 = Slow 4 = Faster)

Here's my UV settings:

384Mhz : 850mV

432Mhz : 862mV

486Mhz : 875mV

540Mhz : 887mV

594Mhz : 900mV

648Mhz : 912mV

702Mhz : 925mV

756Mhz : 937mV

810Mhz : 950mV

864Mhz : 962mV

918Mhz : 975mV

972Mhz : 987mV

1.02Ghz : 1000mV

1.08Ghz : 1012mV

1.13Ghz : 1025mV

1.18Ghz : 1037mV

1.24Ghz : 1050mV

1.29Ghz : 1062mV

1.35Ghz : 1075mV

1.4Ghz : 1087mV

1.45Ghz : 1100mV

1.51Ghz : 1112mV

1.62Ghz : 1125mV

1.72Ghz : 1137mV

1.83Ghz : 1150mV
[Nexus 4 General] :
Uhm I've been running those freqs as my daily driver for the last week and it didn't crash due tu undervolting :D

Yep I got faster one
[Nexus 4 General] Herminator19640927:
That's not pretty low, if you've got a "Fast" chip. Try my settings from the OP and tell me if they work for you as well ;)

Nice :) I'll also try to get a litte bit lower ;)
[Nexus 4 General] Bo0bz:
I can't get my 1.51ghz lower then 1000mv. It just crashes as soon as I lower it. I have a 'fast' chip.

EDIT: Every single UV will bring my performance down. Antutu showed 18K-ish now 9,8K. Strange...
[Nexus 4 General] noobOTT:
Are there any individual apps for undervolting? FauxClock is killing me...
[Nexus 4 General] ninjafan:
Have you tried trickster?
[Nexus 4 General] noobOTT:
Thing reboots immediately after I click apply. Waaaay too low for me. I'm trying OCing down to 800 again (-50mV for everything).
[Nexus 4 General] ptrm2:
OK I am new to this, I have a "nominal" chip, so if I were to go in system tuner > voltage then I would make them all 125 less, for example I would change the 1.35 one to 1050mV? Please tell me if I got this correct, as I am on the newest PA and franco r102:D

Also when I first opened the app I accedently undervolted the 1.35 one all the way down which crashed my phone but it seems like it didn't do any harm can someone confirm this?
[Nexus 4 General] noobOTT:
I think that's okay; just don't go too far below 1000mV. What's the voltage for your lowest frequency?
[Nexus 4 General] ptrm2:
I haven't changed anything yet so the lowest one which is 384MHv is at 900

If I change every one down 125 that would make the 384MHv to 775, is that ok?
[Nexus 4 General] noobOTT:
Hard to say, I have a fast chip and I'm having issues @ 750mV. Try it.
[Nexus 4 General] vaibkulk:
I read it in Franco's thread what you do it set max frequency at lowest first UV by 25-50 run stability test then change Max frequency to next step UV it run test. And so on.

Credits to knew who posted it I don't remember the name.

And nominal can't handle very low voltages like fast and faster ones do so BEWARE

Also don't tick set at boot
[Nexus 4 General] Lennyuk:
I find the camera seems to be the best test of instability - I set voltages that seemed fine, no reboots, no noticeable issues, passed long stress tests fine... then I used the camera and got artefacts in my pictures and occasional camera/gallery force closes.
[Nexus 4 General] TheeWolf:
I'm using Franco kernel and I've managed to lower the 1512 MHz frequency by 200 mV, and could keep going.

Thing is, I'm somewhat afraid of this - is there a way to check if doing this UV isn't to damaging the hardware? Sure, I test the phone by playing games and keeping it on, making sure its not rebooting. But, how do I know something is not slowly being damaged?
[Nexus 4 General] ptrm2:
Ok now say I used by 75 would I see any increase in battery or is it too little at the point?
[Nexus 4 General] younix258:
Dont worry, nothing is being damaged. Youre not putting any extra strain on your system by uving, youre taking it away. Instability will result from lowering voltages too much but the worst thing that could result from that is software issues if it freezes up while writing in an important file or something.

Dont worry lol
[Nexus 4 General] TheeWolf:
Thanks :)

So you're saying that as long as the device doesn't reboot, everything is fine?
[Nexus 4 General] thebrainkafka:
AW: [UV] Nexus 4 UV Thread - POST YOUR UNDERVOLTING RESULTS - GET A (BATTERY)LIFE :)

Looking for a simple and clean APP to manage UV.

Any recommendation beneath Trickster
[Nexus 4 General] TheeWolf:
^

Voltage control?
[Nexus 4 General] strikerdj2011:
my voltages stable fast bin
[Nexus 4 General] 8 -Ƀɪד_Įƞƒɨɖɘɭ:
Hey,

My battery life sucks, it goes down by 20% with nothing running, in about 2 hours of idle use.

I think I had a naff battery I'm going to replace it soon, unless this works well.

I'm on PA 3.1+ ROM and my CPU bin is "faster"

Do you UV like you would any desktop/laptop CPU? (a few mV at a time)

thanks
[Nexus 4 General] younix258:
I uv by alot at first until i get close to the crashing pt. Then i uv by -25 at a time.

Have you tried wiping and reflashing to fix battery drain? Have you checked if it could be cause by one of your apps? Could your battery be draining like that because youre not getting good signal and you have 4g on?

UV hardly helps battery life really so you may as well try my other advice and if it doesnt work, go straight to return.
[Nexus 4 General] Herminator19640927:
Read through the thread and my OP and you'll get your answer.
[Nexus 4 General] namttn:
i use franco r102 with UV -125, everything had seemed good till i took photo by camera of devide, i saw some mark which shaped like tiny flower on my image. I didnt know why, but i guess the reason was UVing. Anybody has got in case like me ?
[Nexus 4 General] 8 -Ƀɪד_Įƞƒɨɖɘɭ:
That is graphical artifacts/glitch I would go back to a safe UV before it causesed real damage, same thing happens to GPU from overclocking or under clocking

have you gone back? and has the artifacts gone?
[Nexus 4 General] namttn:
I havent ever tried. Are u sure it s ok ? When i got in that case, i immediately changed or reflash another kernel, that s bad routine. Tks for ur help.
[Nexus 4 General] accountabc:
I'm on Franco M1, with fast binned CPU. -150 seems to be stable for the last couple of days (tested with almost empty battery as well).
[Nexus 4 General] thebrainkafka:
AW: [UV] Nexus 4 UV Thread - POST YOUR UNDERVOLTING RESULTS - GET A (BATTERY)LIFE :)

Whats the best, safe working result you guys geht in faux kernel working with nominal CPU.

Thx
[Nexus 4 General] younix258:
It wont be similar to what you can get dude,every processor is very different. Just run your own tests and find out about your processor in particular
[Nexus 4 General] caaznkid:
+1 Make sure it's a clean install with full wipe (data/cache/system) and you don't restore data. Even on stock 4.2.2 I could get at least 12 hours + 3 hours on screen....
[Nexus 4 General] Bzh2610:
I've underclocked -150mV with Franco kernel #102. Now m'y battery works about 4h on screen
[Nexus 4 General] Herminator19640927:
Updated my OP and mentioned the possible camera issues when UVing too much ;)
[Nexus 4 General] ptrm2:


Are you on nominal or fast?
[Nexus 4 General] 8 -Ƀɪד_Įƞƒɨɖɘɭ:
I flashed it back to stock and then put the PA 3.1+ ROM on and I'm still testing.

I have been very careful with my battery life since flashing it and iv got 1 day 20 hrs and I still have 42% battery left!

I have had a few things disable ( I always do this) and I don't have any widgets or app that are known to take the p|ss.

Does any one use power toggles? I think that is casing battery drain I have it on my nexus 7 and that gets drained pretty quickly ( again disable services and no apps etc).

Edit: I did just lose 10% from Paranoid android update ;c
[Nexus 4 General] MisterWinkey:
AOKP 4.2.2

Franco stable milestone

Nominal CPU

Undervolted to -150mv

Ran down to 6% battery. Took pictures with flash. Stability tests fine......

All good so far. Have not even played with the wife's fast CPU phone.
[Nexus 4 General] younix258:
If you use 3g/4g all day, you probably wont get more than 2 hours screen time out of a full charge. Switch to wifi and you have the potential for 6 hours lol.maybe this is whats going on?
[Nexus 4 General] hereric:
I was running -125 on all voltages with PA and Franco milestone 1.

I noticed while using the speaker to watch youtube, i would get popping noises randomly. Increasing to -100 seems to have eliminated the problem.
[Nexus 4 General] uumeshh:
When I under-volt my phone @ 288 Mhz using the Matr1x kernel, my phone doesn't seems to go into deep sleep. It remains at 288 Mhz on the lowest. checked with CPU spy. Is this normal?
[Nexus 4 General] Herminator19640927:
There must be something wrong. Reflash the stock kernel and then flash Matr1x again.
[Nexus 4 General] scottx .:
Cm 10.1, Franco nightly. -100 seems stable while -150 causes it to not wake up.

Fast binned CPU.
[Nexus 4 General] JamesInsights:
Hi guys I have a nominal CPU and I see everyone saying things like - 100mv im using trickster and dont see anything to set that just a list of values.. What do i do? Subtract all the values by 100 and reinput them?

Thanks