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Undervolting

Could some give me a quick rundown on undervolting a kernel. I'm using faux's 0.4.2 oc/uv cm7 kernel. From my understanding its already undervolted but I'm confused about whether I should/can adjust those settings for better results or if I should leave them alone.
Info greatly appreciated.
Sent from my LG-P999 using xda premium

Each chip is built differently, so you have to experiment on that yourself. That kernel may already be undervolted but it may not be right for you. I say adjust until you hit instability and then go from there.

tweeklulz said:
Each chip is built differently, so you have to experiment on that yourself. That kernel may already be undervolted but it may not be right for you. I say adjust until you hit instability and then go from there.
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Sorry to jump in on this thread as well, but could you give us some info on how you would undervolt a kernel?
I have setcpu installed, is that enough? Is it possible to break my phone?

barqers said:
Sorry to jump in on this thread as well, but could you give us some info on how you would undervolt a kernel?
I have setcpu installed, is that enough? Is it possible to break my phone?
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Yes anytime you make you phone do something it didn't do from the factory there is a chance you could damage your device..its thx to all the great devs and people that test that make it easier and less likely also the more you read and understand what it is you are actually doing to the device helps alot!
If you have a kernel able to be overclocked/undervolted yes just use set CPU to adjust the settings.
All chips are different just cause a specific setting is working for someone else means it will work the same for you!
That being said I use:
Trigger 8/22 rom with faux123'a 0.4.2 kernel.
My settings:
Max-1408mhz
Min-389mhz
And have 1.1 GHz down to 389 mhz undervolted by 50 and no undervolt above 1.1
also have different profiles set for screen off and in call..
Good luck how this helps..
Sent from my LG-P999 using xda premium

MisfitX said:
Yes anytime you make you phone do something it didn't do from the factory there is a chance you could damage your device..its thx to all the great devs and people that test that make it easier and less likely also the more you read and understand what it is you are actually doing to the device helps alot!
If you have a kernel able to be overclocked/undervolted yes just use set CPU to adjust the settings.
All chips are different just cause a specific setting is working for someone else means it will work the same for you!
That being said I use:
Trigger 8/22 rom with faux123'a 0.4.2 kernel.
My settings:
Max-1408mhz
Min-389mhz
And have 1.1 GHz down to 389 mhz undervolted by 50 and no undervolt above 1.1
also have different profiles set for screen off and in call..
Good luck how this helps..
Sent from my LG-P999 using xda premium
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Thank you for such a detailed explanation! I'll be more weary of fooling around with settings. I'll probably set mine similar to yours.

Thanks everyone. I understood that setcpu would be used for the changes I was more wondering what the changes would do. Like undervolting by 50 for instance, what does that give as far as battery life? Im a moderate to heavy user and I only get roughly 8 hours off the charger before it needs to be back on, great signal all day too.
I suppose I'll just have to tinker with it till I get crashes then adjust from there.
Sent from my LG-P999 using xda premium

wgrant said:
Thanks everyone. I understood that setcpu would be used for the changes I was more wondering what the changes would do. Like undervolting by 50 for instance, what does that give as far as battery life? Im a moderate to heavy user and I only get roughly 8 hours off the charger before it needs to be back on, great signal all day too.
I suppose I'll just have to tinker with it till I get crashes then adjust from there.
Sent from my LG-P999 using xda premium
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How do u get the undervoltage adjustment? i have set cpu and when i try the voltage button on set cpu, i got forced closed. Thanks in advance.

Sounds like a bad install, try uninstalling setcpu then re-installing it or fix permissions in CWM or terminal
su
fix permissions

Used to have that issue too. Try the setcpu available here on the forums, I think that's the one the worked for me.
Sent from my LG-P999 using xda premium

[Q]

Im running the Carbon Rom with the matrix 11 cfs kernel just wondering.. how do they make 1460mhz stable? do they lower the voltage? and if so how do i go about dropping the voltage and what is a safe range because its at 1450mv when i overclock it freezes and reboots.. sorry for all the questions lol

I been asking the same.
On my phone any oc over 1.3 freezes my phone
brought to you by my iced out ns4G

JG96EVO said:
Im running the Carbon Rom with the matrix 11 cfs kernel just wondering.. how do they make 1460mhz stable? do they lower the voltage? and if so how do i go about dropping the voltage and what is a safe range because its at 1450mv when i overclock it freezes and reboots.. sorry for all the questions lol
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Raise voltage to 1475mV...
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but would'nt more voltage be worse?

Nope haha, it will def make it more stable
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al_madd said:
Raise voltage to 1475mV...
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wouldnt more voltage be worse?

More voltages = better stability
some kernels try to undervolt as low as possible but some phones don't like that much UV so you have to manually raise voltages =]
Edit: If your uncomfortable about messing with the voltages you should go ahed to the Trinity thread and flash TUV OR TEUV =] there UV'd to a safe extent.

Every phone is different, might not be able to do it. Simms can run a 1.6 ghz
Sent from my Nexus S using XDA App

sinik420 said:
Every phone is different, might not be able to do it. Simms can run a 1.6 ghz
Sent from my Nexus S using XDA App
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I sometimes think that Simms has a super Nexus or something my phone can go upto 1.5.xx

irizwan said:
More voltages = better stability
some kernels try to undervolt as low as possible but some phones don't like that much UV so you have to manually raise voltages =]
Edit: If your uncomfortable about messing with the voltages you should go ahed to the Trinity thread and flash TUV OR TEUV =] there UV'd to a safe extent.
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Thanks man.. I heard about the Trinity Kernel and looked through the threads but couldn't find it.

JG96EVO said:
Thanks man.. I heard about the Trinity Kernel and looked through the threads but couldn't find it.
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To get the stable releases you can go to morfics website http://www.derkernel.com/
=)

[Q] Have you managed to OC to 1460MHZ and keep stability?

I'm using AOSP+ ICS ROM with the latest Matr1x kernel. Whenever I try to OC to 1460 the phone freezes and I have to pull the battery, so I'm forced to run at a maximum of 1300MHz.
Also, on a related matter, is it good practice to use SetCPU with various profiles (battery<, temp>, screenoff, charging) for various frequencies? Or should I just use AOSP+ tweaks to chose a min and max frequency and let it be?
Thanks for taking the time to answer these.

Raise all voltages by +30 across the board
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My Phone freezes when i try to OC to 1460

Read the above comment or read my FAQ...god..
Lol
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http://www.youtube.com/watch?v=DPclc3eKgiQ&feature=youtube_gdata_player
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zgomot said:
Also, on a related matter, is it good practice to use SetCPU with various profiles (battery<, temp>, screenoff, charging) for various frequencies? Or should I just use AOSP+ tweaks to chose a min and max frequency and let it be?
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Click to collapse
If you are using deep idle you shouldn't underclock since it causes a race-to-idle condition. In other words your battery will drain faster. If you don't use deep idle, feel free to underclock when the screen is off or whatever you want.

sakisds said:
If you are using deep idle you shouldn't underclock since it causes a race-to-idle condition. In other words your battery will drain faster. If you don't use deep idle, feel free to underclock when the screen is off or whatever you want.
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To the point and verry helpful, thanks a bunch
mathkid95 said:
Raise all voltages by +30 across the board
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Can I do this via AOSP+ tweaks and still use SetCpu to OC and UC? Are they conflicting apps? (Deep idle OFF)
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I would recommend just using setcpu
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mathkid95 said:
Raise all voltages by +30 across the board
Sent from my Nexus S using XDA App
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Just an update, Using CNA 1.4.0 and Matr1x v17, I am stable oc'ed to 1460.
this is what I am running
1)800/1460
2)gov =Ondemand
3)Scheduler =Noop
4)all voltages to +30 (used the cna rom's voltage tweaker)
I tried ShadowGun: the Leftover.. and It was flying. Of course, make sure that have enough battery or that you have a charger ready. But finally it works, try this and let me know

I can run it for 10-20 min of usage then get a freeze. I never raised the voltages before though. It seems like its working for other people. And the actual developer of Matrix Kernel is telling you to ....
Nexus S (GSM i9020a)
AOKP (Build 25)
Eugene's Kernel (Speedy 7)
OC 800/100 (Lionheart)
Live OC (105)

It still amazes me how so many people that ask about overclocking have no frigging idea at all how cpus/gpus in general are binned etc.

I have a question. Why do you guys overclock that much? It might be snappy but battery life is just bad and it just doesn't worth it in my opinion.
Sent from my Nexus S from Tapatalk

albundy2010 said:
It still amazes me how so many people that ask about overclocking have no frigging idea at all how cpus/gpus in general are binned etc.
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Care to shed some light for us people that have no frigging idea at all how cpus/gpus in general are binned etc? If not, well... why did you even bother posting?
ljordan2 said:
I have a question. Why do you guys overclock that much? It might be snappy but battery life is just bad and it just doesn't worth it in my opinion.
Sent from my Nexus S from Tapatalk
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Personally, I do it because I can. Seriously... I'm a geek, I love gadgets and tech and I like to tinker.
On the subject at hand, I'm still unable to OC to 1460 (ARM voltages +30, INT voltages +25) but at 1300 it runs fine, no issues whatsoever.

i can run 1460 stable all day. bigxie/matrix. just did +30 to all the voltages above 1000. deadline and lulzactive..

If you are a geek you would know about something as simple as binning chips. Do what a tech geek would do...look it up. Same thing the op should have done with his ?. Hell mathkid has a answer to his ? In the op of his kernel thread. Which is the kernel he is running

albundy2010 said:
If you are a geek you would know about something as simple as binning chips. Do what a tech geek would do...look it up. Same thing the op should have done with his ?. Hell mathkid has a answer to his ? In the op of his kernel thread. Which is the kernel he is running
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You're kinda bitter for someone married to a busty redhead

jesusice said:
You're kinda bitter for someone married to a busty redhead
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Haha, I thought so too.
Sent from my Nexus S

[Q] best app to undervolt and which values

What app can i use best to undervolt my cpu and does anyone have the best values.
Im on the Cleanrom Inheritance with clemsyns universal kernel @ 1.8 Ghz

System Tuner might be able to help you with that... I'm quite not sure what's the best values though...

Will take a look at it thanx.
If anyone by any chance knows good values i would be obliged

what exactly is undervolting for?

sai561 said:
what exactly is undervolting for?
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Using less battery...

danger-rat said:
Using less battery...
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...and remaining stable.

I've been testing under volting for the next version of CROMI.
I am stable by knocking 1.8ghz down to 1300mv on the clemsyn kernels.

Thats OK said:
...and remaining stable.
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Usually it's the other way round - too little voltage makes the system unstable.

[Q] Default max freq?

I just installed Frnaco Kernel 32 build..
when i opened up the app thats also by him i found that the maximum frequency of my all four cores was 1.5ghz ??
can someone please clarify that?
besides is the 'hotplug' setting set to ON by default or we have to change it?
and if i dont make any changes at all just install the kernel,will it make any difference in the way the CPU works?
I am more than satisfied with the way the Nexus works on stock just a little more customization and screen color tuning is all i seek for!
PS i have been through the thread its a long one i did read quite a few but since i am new this query of mine may be stupid enough to even be there so posting it here!

2.296 (or 2.3) approx
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rootSU said:
2.296 (or 2.3) approx
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Hi,
Just a question: isn't it 2,26 Ghz (2265600)?

viking37 said:
Hi,
Just a question: isn't it 2,26 Ghz (2265600)?
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Is it? Maybe. Thought it was just under 2.3 but I don't have stock frequencies so I was going off what I thought was "memory"
Either way though, not 1.5
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rootSU said:
Either way though, not 1.5
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Yes for sure
This is rounded up for 2,3 Ghz, 2,26 or 2,29 Ghz won't make a big difference. In the Nexus 5 I think it's 2.26.
EDIT: I have 2,26 Ghz in stock kernel

rootSU said:
2.296 (or 2.3) approx
Sent from my Nexus 5 using Tapatalk
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so i will jus ramp it up to 2.256 via app!!!!
i font know why it was under clocked on mine to around 1.5ghz!

Sonone said:
so i will jus ramp it up to 2.256 via app!!!!
i font know why it was under clocked on mine to around 1.5ghz!
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Could be thermal throttling. Or a glitch. Which app and kernel version?

Aerowinder said:
Could be thermal throttling. Or a glitch. Which app and kernel version?
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thermal throttling is when cpu reduces the clock speed to prevent overheat! right? (its a question)
ya i am using Franco Kernel(32) and stock rom!
and Franco Kernel Update app!

Aerowinder said:
Could be thermal throttling. Or a glitch. Which app and kernel version?
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Click to collapse
thermal throttling is when cpu reduces the clock speed to prevent overheat! right? (its a question)
ya i am using Franco Kernel(32) and stock rom!
and Franco Kernel Update app (CPU Manager of it)

Aerowinder said:
Could be thermal throttling. Or a glitch. Which app and kernel version?
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Click to collapse
Chaos Kernel. Comes with NXT to tweak to your liking, there are also preset profiles that are very nice. http://forum.xda-developers.com/showthread.php?t=2551441
I made my own profile but do what you will its your phone :good:

Sonone said:
thermal throttling is when cpu reduces the clock speed to prevent overheat! right? (its a question)
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Yes, that's it

Sonone said:
thermal throttling is when cpu reduces the clock speed to prevent overheat! right? (its a question)
ya i am using Franco Kernel(32) and stock rom!
and Franco Kernel Update app (CPU Manager of it)
Click to expand...
Click to collapse
That is correct.