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.
Click to expand...
Click to collapse
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.
Related
I am currently on CM 7 with Tiamats latest non sbc kernel and am considering trying out Vipers scripts to improve battery life, but in doing so, hoping to not negatively impact the performance. I don't know much about what settings to change once I have flashed the script and was hoping someone could suggest what changes I should make (if any are needed, does the script automatically change the default voltages?) I get a little nervous changing things when I don't really know what I am doing. Basically, please let me know what to change to get the best battery life possible without noticeably compromising performance.
Sent from my PC36100 using XDA App
yeha just flash -25mv at a time. and then if it gets laggy I would just get into recovery wiper dalvik/cache and then reflash the kernel. Then get into vipermod and flash the last stable undervolt value.
i lowered by 50 mv and my battery life has increased so much and i dont notice a performance change
Ok, just to clarify, am I choosing lower all voltages by 25mv per time, or just choosing to lower the max voltage 25mv per time. I guess I am not clear on that part. Also, do I need to reset these values each time I reboot my phone? Seems to me, my numbers reset after a reboot, does this make sense?
legasus233 said:
I am currently on CM 7 with Tiamats latest non sbc kernel and am considering trying out Vipers scripts to improve battery life, but in doing so, hoping to not negatively impact the performance. I don't know much about what settings to change once I have flashed the script and was hoping someone could suggest what changes I should make (if any are needed, does the script automatically change the default voltages?) I get a little nervous changing things when I don't really know what I am doing. Basically, please let me know what to change to get the best battery life possible without noticeably compromising performance.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
legasus233 said:
Ok, just to clarify, am I choosing lower all voltages by 25mv per time, or just choosing to lower the max voltage 25mv per time. I guess I am not clear on that part. Also, do I need to reset these values each time I reboot my phone? Seems to me, my numbers reset after a reboot, does this make sense?
Click to expand...
Click to collapse
Hello, glad to have another user. A few things... 1) We aren't that scary in the EVO thread, you can always ask questions there 2) If you go to my site, there is an FAQ that should explain everything you need to know. 3) You want to lower all voltages, that's the easiest way to do it. You can get more advanced and set custom values for min or max if you want. Your changes won't stick after a reboot unless you select "Save changes". I would recommend not doing that until you have played around with the phone after lowering voltages to make sure your phone is stable. What can happen is that if you lower them too much and save changes, you phone might run ok for a little bit and then freeze. Then, you will go into a never ending bootloop (solved by flashing the reset .zip on my site)
I hope this clears it up a little bit for you
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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Click to collapse
BigChillin's right try what he said.
My setting are 120/806 without any problems. This must be you phone...
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
I'd like to undervolt below the max cpu speed. Could someone suggest a reasonable voltage vs. speed table for a spring gs3?
Thanks.
Hi,
If you are looking to undervolt, you have two options.
A. "Safe Undervolt"-
Steps:
1. decrease power -25mA at each clock speed
2. profit
B. Aggressive Undervolt
Steps:
1. Use ns tools of your choice to set the speed you want to test
2. Use setcpu to run a stress test for 10mins minimum. If you don't get any errors and it successfully completes, the clock is safe for daily use.
3. Lower the voltage -25mA after the completion of each stress test until the app becomes unstable.
Do the same process for every possible clock speed.
DO NOT forget to run a stress test and make sure it meets the requirements in step two every time you lower voltage or you will go into bootloop or something else that sucks.
Enjoy!
Amizzly said:
Hi,
If you are looking to undervolt, you have two options.
A. "Safe Undervolt"-
Steps:
1. decrease power -25mA at each clock speed
2. profit
B. Aggressive Undervolt
Steps:
1. Use ns tools of your choice to set the speed you want to test
2. Use setcpu to run a stress test for 10mins minimum. If you don't get any errors and it successfully completes, the clock is safe for daily use.
3. Lower the voltage -25mA after the completion of each stress test until the app becomes unstable.
Do the same process for every possible clock speed.
DO NOT forget to run a stress test and make sure it meets the requirements in step two every time you lower voltage or you will go into bootloop or something else that sucks.
Enjoy!
Click to expand...
Click to collapse
I was hoping someone already did that, so I could test their settings and see if they work for me
I agree, that would be nice.
However, you won't find any reliable preset voltage settings because something like undervolting is somewhat device-specific. Also, knowing what you're doing and knowing how to properly change and check your voltage settings will enable you to troubleshoot issues caused by undervolting more efficiently.
Amizzly said:
I agree, that would be nice.
However, you won't find any reliable preset voltage settings because something like undervolting is somewhat device-specific. Also, knowing what you're doing and knowing how to properly change and check your voltage settings will enable you to troubleshoot issues caused by undervolting more efficiently.
Click to expand...
Click to collapse
Thanks, I knew that already.
I was hoping to see what I mentioned in the OP.
Hi,
Would anyone be kind enough to list a step-by-step process on how to overclock the Note 8.0 using SetCPU? I'm a new user of this app and I'm afraid I may end up doing some irreparable damage to the device.
I am also just curious to see if I can squeeze some more gaming juice from the Note 8.0.
thanks in advance.
jnolaw said:
Hi,
Would anyone be kind enough to list a step-by-step process on how to overclock the Note 8.0 using SetCPU? I'm a new user of this app and I'm afraid I may end up doing some irreparable damage to the device.
I am also just curious to see if I can squeeze some more gaming juice from the Note 8.0.
thanks in advance.
Click to expand...
Click to collapse
I was going to post a link to a setCPU guide, but its no longer available
Id only push the CPU a little. In order to gain real gaming perfomance increases you need to push the GPU, but in order to do that you will need a kernel that supports it.
I only received my tablet last night and wont be rooting it until the weekend so cant say what settings ill be using yet. my aim is to attempt to overclock slightly and undervolt where I can...
You're not going to break it with SetCPU. If you overclock too much, the system will become unstable, then just back off. Also, the system will shut itself off well before any temperature possible of causing permanent damage was reached.
SetCPU has an option to create a recovery-flashable zip file, which resets the CPU settings to default. I would absolutely take this precaution, as I've had to resort to it on my old HTC Flyer tablet (became unstable, and bootlooped). As long as you select this option, you're pretty safe.
Other than that, just follow the basic rule of overclocking any computer, and push the clock up one or 2 increments at a time, then test for a few hours to see if the tablet is stable under various usage conditions. Repeat until you've either reached a desirable clock speed, or encounter instabilities.
Also, as you may already be aware, higher than "stock" CPU clock steps are normally not available unless you flash a custom kernel.
The trickster app supports GPU overclock on Civato's kernel.
If you're looking to push the GPU that's the way to go.
Thanks for the valuable inputs to all.
roustabout said:
The trickster app supports GPU overclock on Civato's kernel.
If you're looking to push the GPU that's the way to go.
Click to expand...
Click to collapse
Does the Trickster app allow for senario clock settings. Ie. underclock the CPU on screen off or if battery is bellow a certain percentage?
I may have to switch from setCPU to it if it has the same settings and more...