Undervolting - Samsung Galaxy Nexus

I thought an Undervolting thread would be good for me and I'm sure it will help others. Messed with it a little bit on my Inc but haven't on this phone yet.
How much do you undervolt by?
How much better is the battery life?
Any kernels that work better with undervolting in your opinion?

TeeRom said:
I thought an Undervolting thread would be good for me and I'm sure it will help others. Messed with it a little bit on my Inc but haven't on this phone yet.
How much do you undervolt by?
How much better is the battery life?
Any kernels that work better with undervolting in your opinion?
Click to expand...
Click to collapse
Well, it's not really needed.
I think most kernels already undervolt themselves to the possible max.
I know Franco has something called Smartflex, which takes in a bunch of calculations and undervolts it at the most optimal level (I think) and undervolting manually doesn't give any more real world battery savings compared to it.
But either way, I'd recommend Franco kernel for some of the best battery life.

Straight 175 seems to be safe for most people. I can undervolt lower. I can UV much lower but then I get a reboot at least once a week. The nexus is so efficient at many things uv'ing helps but doesn't impact usage that much. Honestly I don't think you get but about 30 minutes tops extra screen time and I'm being very generous. Uv'does help keep temps down and helps longevity of phone life.
Sent from my Galaxy Nexus using xda premium

Undervolting shouldn't be relied on for better battery life. It is such a minuscule amount of electricity change. The only thing undervolting should be used for is stability in OC.
Sent from my SGH-I897 using xda premium

Related

[Q] setcpu advanced settings

does anyone use these? if so what have you set yours at? mine are sampling rate (45000), up threshold (93%), and power save bias (140). im looking for battery life from anywhere and if you could give me insight to the best settings, without much lag, id be appreciative and thank you.
Anybody?
Sent from my ADR6300 in memoriam of sakai4eva.
For battery life, I'd recommend a custom kernel. If you don't want to do that, go to profiles and add one for screen off. Make it underclock to 384MHZ min and max. This saves battery a ton.
Sent from my Incredible using XDA App
While I don't know the exact answer to your question -- I have heard that SetCPU doesn't do an incredible amount for the Incredible (no pun intended).
If you're looking for battery life, I'd probably look around (maybe Google?) for people who know how much to underclock it while the phone is not in use -- I know capping the processes really helps the battery life.
xirftwx said:
For battery life, I'd recommend a custom kernel. If you don't want to do that, go to profiles and add one for screen off. Make it underclock to 384MHZ min and max. This saves battery a ton.
Sent from my Incredible using XDA App
Click to expand...
Click to collapse
Did that and noticed some improvement, min 245 max 384. Will that make any changes?
Sent from my ADR6300 in memoriam of sakai4eva.
ejsholly said:
While I don't know the exact answer to your question -- I have heard that SetCPU doesn't do an incredible amount for the Incredible (no pun intended).
If you're looking for battery life, I'd probably look around (maybe Google?) for people who know how much to underclock it while the phone is not in use -- I know capping the processes really helps the battery life.
Click to expand...
Click to collapse
I am actually underclocked to 883mhz on normal usage
Sent from my ADR6300 in memoriam of sakai4eva.
No, it shouldn't affect it. For the most drastic battery life saver, I would consider installing a custom ROM such as skyraider 4.0. I used my phone quite a bit today and lost only 30% battery. I do have an extended battery, but still.
Sent from my ADR6300 using XDA App
i have found the best kernel/rom combo for me that saves battery is MIUI and chad's incredikernel. with that kernel, your screen off will be 128 (versus 245) and it works extremely well. you will get a good full day of use, trust me..

[Q] How do you Undervolt?

So i have Daemon Controller 3.2 something and I've seen a lot of places mention undervolting. I looked around but couldn't find much information on it.. nothing extensive anyway. So my question is: what are the good things about undervolting (besides battery life) and what are the bad things?
If i undervolt and improve battery life does it decrease performance? Any info here would be awesome. Thanks!
Info here
http://forum.xda-developers.com/showthread.php?t=1611620
PatimusXPrime said:
So i have Daemon Controller 3.2 something and I've seen a lot of places mention undervolting. I looked around but couldn't find much information on it.. nothing extensive anyway. So my question is: what are the good things about undervolting (besides battery life) and what are the bad things?
If i undervolt and improve battery life does it decrease performance? Any info here would be awesome. Thanks!
Click to expand...
Click to collapse
The only thing I can think of that you might find as a benefit from U/V is improved battery life.
If you UnderVolt too far you risk freezing and/or damaging your device.
If you successfully undervolt without going too far and causing problems, you should see no negative effect on performance. Just better battery life.
I typically U/V around 50 for all clock ranges. I have never had any negative results doing this. But I haven't been able to prove I get better battery life either. I just take faith in the fact that I theoretically am. I do get wicked good battery life, but that is probably due to many things including kernel, rom, radio, clock speed settings, U/V settings, and other mods. All these together produce noticeable results, where any one by itself would not give any substantial or noticeable improvement.
TheAtheistReverend said:
The only thing I can think of that you might find as a benefit from U/V is improved battery life.
If you UnderVolt too far you risk freezing and/or damaging your device.
If you successfully undervolt without going too far and causing problems, you should see no negative effect on performance. Just better battery life.
I typically U/V around 50 for all clock ranges. I have never had any negative results doing this. But I haven't been able to prove I get better battery life either. I just take faith in the fact that I theoretically am. I do get wicked good battery life, but that is probably due to many things including kernel, rom, radio, clock speed settings, U/V settings, and other mods. All these together produce noticeable results, where any one by itself would not give any substantial or noticeable improvement.
Click to expand...
Click to collapse
Okay cool, I get pretty good battery life too so maybe I'll just skip UV.. no awesome reward just a lot of risk
There is a balance for reward vs risk there. Undervolting by 50 isn't going to put your phone in danger. But if it gets me a couple percent/an hour of battery life, why not?
I'm a believer in doing all the little things that add up to something substantial. Undervolt, Battery MOD, wifi policies, screen on time, charging habits, Kernel, ridding of problem apps, using things like Juice Defender, etc. These all add up to give me better battery life than you can find on almost any non-Max phone. But it takes all of them together, and a constant eye oout for something else I could be doing.
Undervolting may help you.
I havent been a big fan...on my og Incredible it caused nothing but problems with signal...so I dont anymore although the Sense kernel by Dres is undervolted a tad.
Give it a shot and start with -25 increments. Will it affect battery life? Maybe, but engineering tends to dictate that lower voltages dont always affect discharge rates. Higher voltages certainly affect consumption though (and can also lead to major problems).
TheAtheistReverend said:
The only thing I can think of that you might find as a benefit from U/V is improved battery life.
If you UnderVolt too far you risk freezing and/or damaging your device.
If you successfully undervolt without going too far and causing problems, you should see no negative effect on performance. Just better battery life.
I typically U/V around 50 for all clock ranges. I have never had any negative results doing this. But I haven't been able to prove I get better battery life either. I just take faith in the fact that I theoretically am. I do get wicked good battery life, but that is probably due to many things including kernel, rom, radio, clock speed settings, U/V settings, and other mods. All these together produce noticeable results, where any one by itself would not give any substantial or noticeable improvement.
Click to expand...
Click to collapse
I use the app SetCPU for CPU profiles. If I use something like Incredicontrol to undervolt, will it mess up my phone?
zaza224 said:
I use the app SetCPU for CPU profiles. If I use something like Incredicontrol to undervolt, will it mess up my phone?
Click to expand...
Click to collapse
The only way to mess up your phone is to U/V too far and have the "Save for Boot" box checked and no NAND backup.
Make your NAND and run the U/V settings you choose for a day or two before you check the save for boot box. If it freezes up back off your settings a notch and run it for a couple more days.
I run about 50 under without any problems.

Gladdos vs Franco on cm9

Which kernel do you guys prefer? Gladdos is awesome because I love its app with sound options . App seems to also work with Franco kernel though, but as far as reliability and performance goes, which do you guys like more?
Sent from my Galaxy Nexus using XDA
Both are very stable. Use the one that you like more. Franco also has an app.
Sent from my GT-P3113 using xda premium
Personally I'm a big fan of the CM9 kernel. I use CMPlus by Cheekybutt simply because headphones sound like crap without Ezekeel's high performance audio mod.
I use Glados. Its outstanding. I find I can oc higher much more reliably. I use 1.6 for everyday usage which is not even seen as an option on many other kernels. on a lot of other kernels, Franco included I can't run higher than 1.35 CPU and 384GPU. I run 1.6 and 512 with glados. And the app kicks ass with tons of adjustable features!
M3drvr said:
I use Glados. Its outstanding. I find I can oc higher much more reliably. I use 1.6 for everyday usage which is not even seen as an option on many other kernels. on a lot of other kernels, Franco included I can't run higher than 1.35 CPU and 384GPU. I run 1.6 and 512 with glados. And the app kicks ass with tons of adjustable features!
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Click to collapse
512 GPU doesn't make a difference.. neither really does OC or UC
"Long is the way, and hard, that out of hell leads up to light."
joshnichols189 said:
512 GPU doesn't make a difference.. neither really does OC or UC
"Long is the way, and hard, that out of hell leads up to light."
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Click to collapse
I heavily beg to differ. I notice a difference immediately. Everything is smoother when I do oc.
Just tried ocing the gpu in glados kernel and wow, definitely a difference! Now, at 504mhz, does it effect our battery life in a major way?
Sent from my Galaxy Nexus using XDA
Glados with the wheatley gov.
Awesomesauce.
Sent from my Galaxy Nexus using XDA
afive720 said:
Just tried ocing the gpu in glados kernel and wow, definitely a difference! Now, at 504mhz, does it effect our battery life in a major way?
Sent from my Galaxy Nexus using XDA
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Click to collapse
From what I've heard (not tried), the gain from OC'ing is minimal and battery consumption increase is quite big.
Swyped on my CM9 Galaxy Nexus
why do you even need to overclock? To me battery life is most essential factor and I have yet to come across a kernel that can give me satisfactory results, stock included. The screen on this thing is beautiful but eats battery like no other. I can't wait for Verizon to have a larger Note like device so we can have a larger battery.
The battery life on this phone is amazing for a Verizon LTE phone. Before I activated the phone I played with it around the house for about a week (had to take care of some things before I quit using the iPhone). I went 25 hours with 3 hours of display time. Mind you this was all on WiFi and since it wasn't activated there was no talk time. LTE is the battery destroyer not so much the screen. I have never ran this phone stock, so I have no benchmark to compare it too, but the charging times on the Franco kernel are insane. Went up 65% in 1 hour over a car charger.
I'll have to check out the Gladdos kernel.
what car charger do you have and what apps were you running? I have a 1.2amp usb charger from monoprice and with maps and pandora on it charges for a bit before it gets too hot and switches to "not charging" to not overheat. Then it stays at about the same battery level, give or take a few %
Something similar to this....http://www.newegg.com/Product/Product.aspx?Item=9SIA07Y02A5396. Since it's dual port I'm sure it has a bigger fuse.
M3drvr said:
I heavily beg to differ. I notice a difference immediately. Everything is smoother when I do oc.
Click to expand...
Click to collapse
I suggest reading through the Franco.Kernel thread.. everything above 384 is minimal at best.
"Long is the way, and hard, that out of hell leads up to light."
ashish8 said:
The battery life on this phone is amazing for a Verizon LTE phone. Before I activated the phone I played with it around the house for about a week (had to take care of some things before I quit using the iPhone). I went 25 hours with 3 hours of display time. Mind you this was all on WiFi and since it wasn't activated there was no talk time. LTE is the battery destroyer not so much the screen. I have never ran this phone stock, so I have no benchmark to compare it too, but the charging times on the Franco kernel are insane. Went up 65% in 1 hour over a car charger.
I'll have to check out the Gladdos kernel.
Click to expand...
Click to collapse
which brings me back to the another comment I made in another thread, LTE speeds for a phone is unnecessary. Lose battery life and pay up the wazooo if you don't have unlimited data (soon all of us)? Just a way for the big red to justify charging more. #switchingoffLTE
joshnichols189 said:
I suggest reading through the Franco.Kernel thread.. everything above 384 is minimal at best.
"Long is the way, and hard, that out of hell leads up to light."
Click to expand...
Click to collapse
Then why offer a 512oc if its nothing? Reality is, the phone is noticeably smoother with it. And virtually no hit on battery life. I'm still getting high 3 hours screen on time and 20+ hours battery life. I'll take the much smoother experience for minimal battery life hit.
M3drvr said:
Then why offer a 512oc if its nothing? Reality is, the phone is noticeably smoother with it. And virtually no hit on battery life. I'm still getting high 3 hours screen on time and 20+ hours battery life. I'll take the much smoother experience for minimal battery life hit.
Click to expand...
Click to collapse
Much smoother? Exaggerate much??
And as for battery life, I get 5hrs screen on with 384.
Games run smoothly, UI is smooth, what more do you need.
If you can run 512 then why not but it does not make that much of a difference.
I have used both and I find no difference.
nodstuff said:
Much smoother? Exaggerate much??
And as for battery life, I get 5hrs screen on with 384.
Games run smoothly, UI is smooth, what more do you need.
If you can run 512 then why not but it does not make that much of a difference.
I have used both and I find no difference.
Click to expand...
Click to collapse
Well, for me on my phone, its a major difference between 384 and 512. And I've seen several people comment that it is a difference on their phone too. Web pages scroll is jerky on 384 for me, and with 512 its perfectly smooth. I've never ever gotten 5 hours screen on time with any setting I've ever chosen on my phone so thats not even in the question. Max ever was 4:30 screen on, that was with screen brightness lowest possible, entire time with wifi, which is not even in the question for me on a normal day. Normal for me is high 3's.
Anyways, we all know none of these phones are the same. They react differently to different settings. All I know, is on my phone, 512 is by far smoother than 384. And at a 40% OC of the CPU (1680-1700mhz) the phone is also noticeably faster. And actually, on my old Galaxy S, 1400 was the magic number i needed for things to actually FEEL and LOOK faster, which was 40% more. Anything less than that, I couldn't notice a boost. Thats just my thought on my phone.
Its very easy to see the difference in scrolling smoothness between 512gpu and 384gpu.
All you have to do is go to theverge.com mobile site and just scroll up and down using the stock browser.
The difference is very noticeable.
Glados 1.34 seems to resolve data drop issue, so I've stuck with it for now.
Sent from my Galaxy Nexus

underclocking the CPU..

Does anyone know If underclocking the CPU actually save battery life?
It would technically save an incy teency bit but I doubt you will really notice a difference given the small window of safe underclocking. When I tried it my phone ran like crap but what do I know. The way I figured it was the phone was optimized at 1.2ghz. It's like putting 87 octane gas in a high end sports car. Some people swear by it though. Just try it and see if it works for you.
It can but if it's not by much I would doubt you would notice a difference..
-Sent from my Blu Kuban themed Tapatalk like a Boss
Very true. I would just slightly under volt it then under clock it. Like 25 to 50 mV under. Any less than that and you can run into issues. Tagraz has an OC/UC module within the app.
Sent from my SPH-D710 using xda app-developers app
I like to underclock but noticed that if I underclock + undervolt + use any tweaks my battery drains faster... I've been experimenting with different mods and I know on my phone if I just underclock + under volt I get no issues.. if I run just the tweaks ( kob's or td's ) without underclockin and undervolting everything is OK... so trying to see which one is better on battery + performance...
Sent from my SPH-D710 using XDA Premium App
It's been my experience on gb that under clocking from 1200 to 800 vastly improves battery life. It's possible it's placebo, as I've done no specific testing, but the battery life does appear substantially better. Oh and that is with no undervolting

[Q] Best frequency for overclocking with battery life in mind?

For the people that have been overclocking this phone for a while now, what are your opinions on the best max frequency above 1.5GHz to clock to while still keeping decent battery life?
Overclocking isn't exactly a battery friendly thing to do, you will see battery drain if you clock to higher frequencies. My only advice is don't oc too high if you want to keep battery life in mind. Going to 1.67 or 1.72 should give you a decent speedup without murdering the battery.
I run mine at 162 its no diff in voltage from 151 at least on uber kernel it is.. Also try to under clock the the freq until or happy and no random reboots
Sent from my SAMSUNG-SGH-T989 using xda app-developers app

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