I am new to the whole idea of undervolting. I have previously overclocked my phone's but never undervolted. Is there a how to guide anywhere in the forums that i failed to find, if not can someone explain the steps and settings that they found stable on their phones with out a significant performance decrease. I am already rooted and have an overclock/undervolt kernal installed. I apologize if i missed this topic in a search.
Sent from my SGH-I747M using xda app-developers app
First step would be to go to the kernel thread and see how/what app should be used for the under volt/governor/i/o scheduler settings and install that. Different kernel makers may want you to use different methods.
Second, under volt settings will be different for every phone as the hardware is different. The best way is to take down every frequency 25mV at a time and do not use set at boot or any option like that. The reason for this is that you need to make sure your phone will be stable. If you set at boot and go too far and your phone reboots, you may be stuck in a boot loop and have to reinstall your ROM. After trying your phone for awhile and it seems stable reduce the voltage again and try it out continuing these steps until your phone becomes unstable/reboots/lags then raise your voltages the next step up. Try again for a bit and if all is well then you can utilize the set at boot option.
Remember every phone is different, only lower your voltages till what is good for you, doesn't matter if someone else with same ROM kernel can under volt further, they just have different hardware.
sent from my iPhone killer using tapatalk 2
I would check this page out too..
http://forum.xda-developers.com/showthread.php?t=1369817
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newbie member here needing help with overclocking my evo. i am very familiar with loading custom roms but for some reason i can not find any step by step guides to overclocking. i am running the fresh evo rom with king kernel 9. i downloaded the supersonic zip and tried installing it from recovery, and my phone wouldnt reboot past the first "htc evo4g" screen. just kept rebooting into that screen. any help would be appreciated. and if i posted this in the wrong place there is no need for assholes telling me. im new here.
What was in the supersonic zip? What exactly were you trying to flash?
The easiest way would be to get setcpu, and then adjst the values.
Just get setcpu from the market. Overclock away.
Sent from my PC36100 using XDA Premium App
Miley420 said:
newbie member here needing help with overclocking my evo. i am very familiar with loading custom roms but for some reason i can not find any step by step guides to overclocking. i am running the fresh evo rom with king kernel 9. i downloaded the supersonic zip and tried installing it from recovery, and my phone wouldnt reboot past the first "htc evo4g" screen. just kept rebooting into that screen. any help would be appreciated. and if i posted this in the wrong place there is no need for assholes telling me. im new here.
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As teh roxx asked, what was the 'supersonic zip' that you flashed? I am not familiar with it. Is it something specific to fresh's rom? From the point you're at now, your best bet will be to restore a nandroid backup (if you have one) to get you back to where you were before you flashed the 'supersonic.zip'. If you don't have a nandroid backup to restore, you're most likely going to have to re flash your rom, if you are indeed completely stuck at the splash screen. Have you tried wiping cache and dalvik cache, then rebooting agaain? If it just hangs at the splash, restore nandroid or reflash the rom. Thats basically the only option to ge t you up again.
And I don't really overclock at all, but I believe you just need a kernel that supports overclocking, and use an app like SetCpu or OS monitor to change the clock speed. Never check the setting 'set on boot' until you're sure that the changes you've made are running stable.
Just flash cm7 it has cpu governor built in
Sent from my PC36100 using XDA App
Miley420 said:
newbie member here needing help with overclocking my evo. i am very familiar with loading custom roms but for some reason i can not find any step by step guides to overclocking. i am running the fresh evo rom with king kernel 9. i downloaded the supersonic zip and tried installing it from recovery, and my phone wouldnt reboot past the first "htc evo4g" screen. just kept rebooting into that screen. any help would be appreciated. and if i posted this in the wrong place there is no need for assholes telling me. im new here.
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Why do you want to overclock your device?
In all likelihood, you should expect only an improvement in CPU frequency of about 12%.
However, you should consider what the potential consequences of that could be. Although there are certain tolerances included, you should consider that consistently operating at higher frequencies could negatively affect the durability and/or longevity of your device's CPU. If additional cooling were something that you could add, then perhaps thermal thresholds would not be an issue. Because smearing thermal paste everywhere is not an option, you should consider another option.
The advantage of a custom ROM is that in some cases it's designed with profiled-governors and absent bloatware that tends to prematurely drain your battery and decrease overall performance.
I am not convinced an increase from 984 MHz to 1113 MHz is worth being tethered to an AC outlet.
acerbusconfig said:
Why do you want to overclock your device?
In all likelihood, you should expect only an improvement in CPU frequency of about 12%.
However, you should consider what the potential consequences of that could be. Although there are certain tolerances included, you should consider that consistently operating at higher frequencies could negatively affect the durability and/or longevity of your device's CPU. If additional cooling were something that you could add, then perhaps thermal thresholds would not be an issue. Because smearing thermal paste everywhere is not an option, you should consider another option.
The advantage of a custom ROM is that in some cases it's designed with profiled-governors and absent bloatware that tends to prematurely drain your battery and decrease overall performance.
I am not convinced an increase from 984 MHz to 1113 MHz is worth being tethered to an AC outlet.
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+1 on this. I've played with numerous ways, always seem to go back with just the Rom and the kernel.
Sent from "The EVO" using XDA Premium
In the past week have just rooted my inc2, flashed OMGB rom and Tiamat 1.1.0 kernel. I also loaded SetCPU from the market. I can't go over 1.036ghz without the phone locking up and having to do a battery pull. When the phone is back on I only have a few seconds to open SetCPU and lower the OC rate or the phone will lock again. I wiped cache/davlik cache before flashing kernel. What am I doing wrong? I have seen in the Tiamat thread in the development forum that people are going as high as 1.9ghz with out a problem. I would only like to get 1.2ghz to 1.3ghz because I read that this is a safe range. I do have have the governor set at Smartass. Thank you for your input.
scott7044 said:
In the past week have just rooted my inc2, flashed OMGB rom and Tiamat 1.1.0 kernel. I also loaded SetCPU from the market. I can't go over 1.036ghz without the phone locking up and having to do a battery pull. When the phone is back on I only have a few seconds to open SetCPU and lower the OC rate or the phone will lock again. I wiped cache/davlik cache before flashing kernel. What am I doing wrong? I have seen in the Tiamat thread in the development forum that people are going as high as 1.9ghz with out a problem. I would only like to get 1.2ghz to 1.3ghz because I read that this is a safe range. I do have have the governor set at Smartass. Thank you for your input.
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Go back to the kernel thread look for the voltage table. The voltage levels are too low at the overclock levels, that what's causing your freeze ups. Use incredicontrol app from the market to adjust the voltage levels. You want to mirror the settings to match those of the previous version of the kernel
Sent from my Incredible 2 using Tapatalk
Thanks tnez, I found chads post about incredicontrol and sounded like it only worked on ver 1.0.4, will it work on ver 1.1.0 also.
How bad is this freezing for the phone? If I ever get really stuck will booting into recovery and reflashing omgb fix it or using the nandroid backup I created before flashing the kernel? Still new to all the rooting and custom roms and kernels, lots of fun but still have the fear of bricking the phone.
I'm fairly new myself but have been using SetCPU for a while. Make sure the "Set on Boot" option is unchecked until you find a setting that will work for your phone. As far as the nandroid, restore is your friend!! lol I've made many mistakes in the past that have totally locked up my phone and the restore option from recovery has saved me every time. There is always a chance that you can damage your phone but as time has gone by the devs have really made that possibility minimal
scott7044 said:
Thanks tnez, I found chads post about incredicontrol and sounded like it only worked on ver 1.0.4, will it work on ver 1.1.0 also.
How bad is this freezing for the phone? If I ever get really stuck will booting into recovery and reflashing omgb fix it or using the nandroid backup I created before flashing the kernel? Still new to all the rooting and custom roms and kernels, lots of fun but still have the fear of bricking the phone.
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The app works on any kernel that supports adjustable voltages.
Both methods will work to undo things. Either restore or re flash the rom. But like stated above don't select the set on boot option until you find settings that work good on your phone.
Sent from my Incredible 2 using Tapatalk
Thanks again tnez, I installed incredicontrol and made the changes to the voltages so far so good. I have gone to 1.19ghz with no problems after the voltage changes. Is there app that can be used to test for stability or is just using the phone the way to test for stability.
scott7044 said:
Thanks again tnez, I installed incredicontrol and made the changes to the voltages so far so good. I have gone to 1.19ghz with no problems after the voltage changes. Is there app that can be used to test for stability or is just using the phone the way to test for stability.
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You can do it by use....open up different apps very quick and switch between them...basically trying to over load the phone by making it multi task at a high level. set cpu also has a built in stress test under the info tab, run that for a few mins. I usually do the stress test for 3-5 mins followed by a quadrant test.
Sent from my Incredible 2 using Tapatalk
In regards to Tiamat, there have been a ton of people say that downgrading back to 1.0.4 Tiamat fixed the issue of the phone locking up when overclocked. If all else fails from what you have been recommended, try that!
TheMavic said:
In regards to Tiamat, there have been a ton of people say that downgrading back to 1.0.4 Tiamat fixed the issue of the phone locking up when overclocked. If all else fails from what you have been recommended, try that!
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voltages just need to be changed and made to match 1.0.4 for the kernel to run like a champ
Sent from my Incredible 2 using Tapatalk
So i just flashed the new 'code name droid' ROM and its sweet but it also comes with a overclocked kernel up to 1350 mhz and the ability to under-volt. I've heard under-volting can save on battery so i want to try it out!
SO my first question is , what are the pros and cons of playing with voltage?
second, is the amount i can change the voltage determined by each individual kernal? if so what about this one?
AND THIRD what should i under-volt my phone to and why?
also if anyone wants to share what they have volted their phone at please share!
thanks alot!
The worst thing that could happen is that your phone will not boot. Then you have to reflash. Just decrease the voltage carefully. If you notice instability, you undervolted too much.
Let me quote myself from the franco kernel thread.
Nebucatnetzer said:
No I can't.
For all the guys around here which would like to undervolt but don't have a clue how to do it right.
(I don't adress this to you jhericurls).
1. Get and app like Franco's Kernel Updater or setCPU. Both of them are working.
You need as well an app called Stabilty Test
2. Go in to your CPU control app and lock the frequency at the lowest. In our case 350Mhz.
3. Now you go to the undervolting menu. Select 350Mhz.
(Make a backup of your current voltages. In setCPU you can find the option under the voltage tab and then press the menu button.)
The correct way to undervolt would now be to lower the voltage by one step of -25mV. For impatient people like me.
Yes it is possible to take bigger steps. At least in the beginning in the end you have to do it step by step to test it properly.
Important: Do not select the "set on boot" option.
4. Go to the Stability test app and run the Classic Stability Test for a couple of minutes.
I always make at minimum 3 CPU runs.
5. Now go back to your CPU control app. And lower the voltage one step more.
6. Repeat step 4 and 5 until the phone crashes and reboots. Now go back to the voltage tab and raise the voltage by one step.
This is now your lowest "stable" voltage for 350Mhz.
7. Repeat step 2-6 with the other frequencies. When you're finished lock your frequencies how you like them or how the were before.
I recommend you to run now the Scaling Stabilit Test for a couple of minutes. Just to be sure. Now you undervolted your CPU.
IMPORTANT: As long as you're testing you voltages, NEVER, select the "set on boot" option.
If one of your voltages is to low you can end up in endless bootloops.
I don't even select it afterwards until I'm sure they're working fine. Real world usage differs from testing.
So it can happen that your phone suddenly reboots even after the testing.
It this case I recommend you to raise all voltage on step.
If you think you found a bug in the kernel and you're undervolted.
DO NOT REPORT IT. Revert back to the stock voltages, reboot and test if the bug appears again.
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1. It could cause some instabilities but hey you're flashing custom recoveries so that shouldn't bother you too much.
2. Some kernel are setting a minimal voltage it's like the deepest possible voltage. I don't know if any kernel for the GNEX is having this function.
3. No body can help you with your values since every phone is different. Maybe yours is very good so you can go deeper the most of us.
My phone freezes just as or very soon after i choose to overclock in cm7 settings.
My last WFS was really loving the O/C.
Has anyone any solution. Many thanks
Edit: I can use userspace govenor and go to 806mhz but dont notice any difference in speed of hone. Tried cpu spy
Perhaps it's your kernel. Which kernel do you use? (go to Settings, About Phone, Software, More, Kernel version)
Also, what apps do you use to do the overclock?
It's likely your phone. Not all chips are made the same. Set your governor to performance and slowly ramp her up till it freezes. Then take a step down and leave it.
Sent from my HTC_A510c
BigChillin said:
It's likely your phone. Not all chips are made the same. Set your governor to performance and slowly ramp her up till it freezes. Then take a step down and leave it.
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BigChillin's right try what he said.
My setting are 120/806 without any problems. This must be you phone...
I just rooted my s3 and would like to overclock it a little. Just wondering what the best settings would be and if Set cpu is indeed the best app for this. Thanks in advance and I apologize in advance if I'm in the wrong section.
First you're going to need to flash a kernel that has overclocking capabilities. I highly recommend ktoonsez however if you are not familiar with extreme customization, then faux or lean kernel are better suggestions
Sent from my SGH-T999 using Tapatalk 2
I also suggest that whatever app you do use (I use SetCPU as well but they all generally work the same), DO NOT SET ON BOOT.
Since you aren't quite sure you know what you are doing yet, if you input a wrong value or your CPU can't handle "that high" an overclock or your CPU cannot handle "that low" of an undervolt and have it Set On Boot, you will be stuck and have to Nandroid back.
Once you know if certain values work for you, then use Set On Boot.