How to underclock GPU? - Galaxy S III Q&A, Help & Troubleshooting

I'm using Siyah Kernel and all I can see in the ExTweaks is one option in GPU which is GPU lock which has a minimum of 500mhz and to a maximum of 1200mhz.
How can I underclock or change the GPU frequency settings like this:
GPU: 100MHz-160MHz-266MHz-400MHz
TIA!

Earlier beta versions were possible with extweaks.
I am sure future releases will too.
I am sure GM had is reasons, maybe stability.
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If its not possible with extweaks what other options can i do to underclock the gpu?

1. Wait for future releases, can't be that urgent, can it?
2. Flash an old beta release. They are beta for a reason......
I would go with option #1
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Related

Tegrak settings for i777?

I've been using SetCPU for profiles, OC, and UV my phone. However I notice that the Tegrak OC app gives the user more control with tuning the GPU and I/O scheduler in addition to everything that SetCPU offers. Can someone who's been using Tegrak for awhile provide their voltage settings (since its more detailed than the voltages in SetCPU) and if possible any GPU settings/voltages. Also does using a certain I/O scheduler results in a noticeable improvement in performance or day to day usage?
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bencozzy said:
ok only thing ive played with is just overclocking and using the noop scheduler.
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Click to collapse
Does tweaking the I/O scheduler leads to a noticeable improvement in performance? Can that be changed in SetCPU?
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+ 1
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i get about 12 hours.
hi,
please can u help me, when i tried to intall tegrak on my i777 from the market it says " device not yet available" , did any one have the same issue ??
thanks

Set CPU

When i use set cpu and set the highest clock at 1 ghz it still goes past it to 1.2 ghz. Im useing siyah. Any help will be appreciated.
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I doubt your kernel has anything to do with it because Siyah's kernel does support both OC and UC. Do you have any profiles that have a maximum of 1200Mhz instead of 1000Mhz? Those could be kicking in even when you don't want them to if you aren't careful.
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Nope I'm not using any profiles. Although in CWM in kernel specific options I did select performance mode if that has any thing to do with it
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Try deselecting that option or selecting a different one. I don't have a ton of experience with Siyah, but a performance mode sounds to me like it will default to the maximum CPU speed. Which on the SGH-I777 is 1200Mhz, stock.
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dogfax said:
Try deselecting that option or selecting a different one. I don't have a ton of experience with Siyah, but a performance mode sounds to me like it will default to the maximum CPU speed. Which on the SGH-I777 is 1200Mhz, stock.
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Click to expand...
Click to collapse
Ok I will try that out
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Performance is a Governor for the CPU that sets it to Max frequency . That's what its FOR. So its doing what its supposed to. As previously stated you have to switch to a different governor in order to underclock.
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Phalanx7621 said:
Performance is a Governor for the CPU that sets it to Max frequency . That's what its FOR. So its doing what its supposed to. As previously stated you have to switch to a different governor in order to underclock.
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Click to expand...
Click to collapse
I'm not talking about the governor in CWM there is a option for default, battery and performance
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No, he doesn't mean anything to do with CWM. When you're selecting or switching to a governor, a list comes up and depending on the governor, your CPU will behave a certain way. If the maximum is set at 1200Mhz and is going to that speed when you have performance governor on, that's what is supposed to happen.
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my governor is luzactive
dirtbikerr450 said:
my governor is luzactive
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Uninstall any other clocking apps and clear application data (manage applications) for SetCPU.
Sent from my Galaxy S2
Change your governer to something other than lulzactive.
lulzactive forces your CPU at a certain rate. Thus, the "active". and the "lulz" on my end.

[Q] Now that we have the access to tweak our weapons....

Since we now have Perseus kernel and we can tweak stuff, the cpu is easy enough to tweak. But for the gpu and voltage and charging etc... what's a good app that is compatible? I used to use STweaks with Siyah. But don't what's the best all round tweaking app
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btemtd said:
Since we now have Perseus kernel and we can tweak stuff, the cpu is easy enough to tweak. But for the gpu and voltage and charging etc... what's a good app that is compatible? I used to use STweaks with Siyah. But don't what's the best all round tweaking app
Sent from my GT-I9305 using xda app-developers app
Click to expand...
Click to collapse
I use AnTuTu and Quadrant
ps cpu crashes at 1800Mhz run at 1704
They are just benchmarking programs are they not? The OP was asking about a program that allows you to tweak the rom like Xtweaks or any of the others.
narcarsiss said:
I use AnTuTu and Quadrant
ps cpu crashes at 1800Mhz run at 1704
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Click to collapse
Yeh I never run it at the max just for saftey precautions, I already know how to tweak the CPU i am actually talking about tweaking everything else do you know any other software like Stweaks for Siyah?
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Moving to Q&A
For GPU clocks and voltages you need to use scripts.
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System monitor pro is pretty good
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try SetCPU you can alter the governor and the voltage plus you can also check if the undervolt you did is stable

whats the best overclock settings for this phone?

I game a lot and im running Viper 2.2... Whats the best overclock settings for this phone... CPU and GPU
miguel11691 said:
I game a lot and im running Viper 2.2... Whats the best overclock settings for this phone... CPU and GPU
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I overclocked gpu in a way that I can use asphalt without lag at 500mhz, also for minecraft I use at 300mhz and for more demanding games I use 1ghz
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jose51197 said:
I overclocked gpu in a way that I can use asphalt without lag at 500mhz, also for minecraft I use at 300mhz and for more demanding games I use 1ghz
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Click to expand...
Click to collapse
What app do u use to overclock your gpu... I use the native viper app to overclock the cpu but th egpu option I don't see
miguel11691 said:
What app do u use to overclock your gpu... I use the native viper app to overclock the cpu but th egpu option I don't see
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Gpu overclocks itself on-demand, I didn't implement anything for user control, instead it is better to be this way
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On this device even 1.5 is borderline. Anything over THAT u got problems.
1.48 is the most stable safest and still really damm fast.
Be mindful of governor settings. Research your kernel before taking on OC mods.
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Setcpu ?

I undervolted my phone with Setcpu with max freq of 1150 MHz, however in CPY spy i still find freqs over that r being used.....is there something wrong?
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ROMFlasherAce said:
I undervolted my phone with Setcpu with max freq of 1150 MHz, however in CPY spy i still find freqs over that r being used.....is there something wrong?
Sent from my HTC One X+ using xda app-developers app
Click to expand...
Click to collapse
You most likely have a performance option that came with the Custom Rom or are running an app that has System App access , which will over ride a User App. Double check all apps and settings to see if you have any other programs that have system user rights to your CPU, that is most likely what is over taking your desired settings.
Kyles1329 said:
You most likely have a performance option that came with the Custom Rom or are running an app that has System App access , which will over ride a User App. Double check all apps and settings to see if you have any other programs that have system user rights to your CPU, that is most likely what is over taking your desired settings.
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Thanks for the quick reply, I'm on the Android Revolution HD 8.0 ROM now, that is probably the reason for this. Can I do something with this?
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Open up the app your using to undervolt, these should be an option to restore default values. Once back on default go ahead and open the programs' App info and disable or freeze it. Reboot and run your CPU spy app and see what is taking charge of your voltage. Also possible your voltages are not sticking which has to do with the ROM. Id suggest running profiles for CPU rather then undervolt. I. E. 534 mhz - 1434 mhz when screen on, 348-1012 when screen off. SetCPU is what i use. You have less of a chance of frying the motherboard and doing irreversible damage to your phone internally
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Undervolt has to do with lowering the power that goes to the battery. when desired mhz occurs, where as underclocking has to do with specifically CPU processors and with a specified setting (screen off, music app on) occurring. Just to clear up my previous post. Undervolting the battery use to do wonders on phones a few years back because of all around poor battery life on most devices. But nowadays it is pretty pointless.
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Setcpu is NOT compatible with tegra quadcore
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Lloir said:
Setcpu is NOT compatible with tegra quadcore
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Click to expand...
Click to collapse
What Lloir said. ^^^
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The only app that seems to work properly with Sense stock kernel is Tegra Overclock.
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