Been wondering this for a few days. Does setCPU raise CPU voltage when it overclocks ?
Because if it doesn't, then battery life shouldn't be affected.
I'm not sure about SetCPU itself, but in order to overclock, the voltage must be raised anyway - for example on my milestone ( using milestone-overclock ) when i set the maximum to 1.2Ghz, i have to change it to 80vsel. ... so battery life will be affected when you load a custom ROM or load the kernel module to overclock.
so when you load the overclocked setting in setCPU, it uses the vsel specifed from there, right? which would result in more voltage
This may be a stupid question but, if the voltage can be underclocked for the cpu, how about lowering the voltage output for the screen?
Xperia X10 mini pro [MOD] FroyoComb v1.2
What is the best cpu frequency for stabile working, i use set cpu app for this.
I use 'coservative' scalling Min: 768 Mhz (when some problems i reduce to 748MHZ or 600Mhz when i dont need more performance) Max: 787 MHz or even 808 Mhz but this freq is too high. Is this scalling are good or use different (ondemand,performance)
Also i have question when my phone is blocked (screen is off) cpu freq back to normal low freq or still have the same freq like in set cpu app ?
No one can give specifics as even with one model of phone the quality of CPU changes so set frequencies differ.
EG: i'm using DHD with 1.6GHz OC "smartass" but some users top out on 1.3GHz, could OC more stable but don't need, regards underclock i've screen off "Powersave" lowest frequency 245MHz don't forget to set priority high.
There is more you can do with set CPU such as underclock on less battery so know get more for criticle phone usage, also temp based so again saving power.
Anyway best bet is to look for other users of x10 and see what they top etc.
Hi,
I'm running NSCollab 1.0.50 with franco.kernel from Nov. 13 on a I9020a.
I'm playing around with undervolting the cpu and trying to find the minimum stable voltages. My procedure is to start the voltage as low as the voltage for the frequency step before it and then increase the voltage in 25mV steps until everything is stable. I am using SetCPU to adjust the voltages.
So far this has worked for every frequency step except for the 100MHz step. I can't seem to find the lowest voltage for 100MHz. For example, the 200MHz step will be unstable at 750mV but is stable at 775mV. The 100MHz step is never unstable no matter how low I set the voltage. I can even set it to 0mV (which I know is ridiculous) and it wont freeze.
Does anyone know why the phone doesn't become unstable at ridiculously low voltages for the 100MHz step? I see that the slider to adjust voltages in SetCPU only goes down to 600mV but I can manually type in lower voltage values. Is there some kind of hard-set voltage minimum for the cpu that even SetCPU can't bypass when setting the voltage? Is the phone violating the laws of physics?
Thanks in advance
What's your min frequency in setcpu?
Oh yeah, I should have posted that.
100MHz min
1000MHz max
lazy scaling
i heard that ...
force phone running in low mV MAY damage the CPU and other parts of it and destablize it...
=================================
i have seen some applications that would ignore your input value when it is not logical ...
for example like NS tools , one of them , i don't remember which exactly , perhaps it's live OC, for live OC, if you set value lower then 100 , it would automatically set back to 100 ... i think this may be same as your min frequency case...
nathanson666 said:
Hi,
I'm running NSCollab 1.0.50 with franco.kernel from Nov. 13 on a I9020a.
I'm playing around with undervolting the cpu and trying to find the minimum stable voltages. My procedure is to start the voltage as low as the voltage for the frequency step before it and then increase the voltage in 25mV steps until everything is stable. I am using SetCPU to adjust the voltages.
So far this has worked for every frequency step except for the 100MHz step. I can't seem to find the lowest voltage for 100MHz. For example, the 200MHz step will be unstable at 750mV but is stable at 775mV. The 100MHz step is never unstable no matter how low I set the voltage. I can even set it to 0mV (which I know is ridiculous) and it wont freeze.
Does anyone know why the phone doesn't become unstable at ridiculously low voltages for the 100MHz step? I see that the slider to adjust voltages in SetCPU only goes down to 600mV but I can manually type in lower voltage values. Is there some kind of hard-set voltage minimum for the cpu that even SetCPU can't bypass when setting the voltage? Is the phone violating the laws of physics?
Thanks in advance
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The method you are using is wrong. I did the same thing a few days ago, and changing the values like that won't work.
What I found out is that to easily find stable values, in SetCPU put your max as 200MHz and your min at 100MHz. Use ondemand. Keep 200MHz at stock volts and 100MHz try an undervolt.
Apply everything then slide the minimum frequency slider around a bit. I guarantee you 600mv will freeze. Do the same for each value, if testing 200MHz, use 400MHz as your max and 200MHz as your min, stock volts for 400MHz. Slide the minimum frequency left and right.
Sounds weird, but it works. Do this until you find a voltage for each frequency. Then put your frequency max and frequency min at the same value (IE 200MHz) and launch a game or a demanding app and play for a lil while, even if performance suck. Hope it doesn't freeze on you, but if it does, bump the voltage a bit.
If you want good starting values, here's the values I have found that work for me and are 100% stable. No force close over the last few days since I started using those:
100MHz 875mv (75mv under stock)
200MHz 875mv (75mv under stock)
400MHz 900mv (150mv under stock)
800MHz 1125mv (75mv under stock)
1000MHz 1225mv (25mv under stock)
Hello.
Is there a way to check current CPU voltage and max CPU freq. on Sensation? Better using adb\shell command.
Faux Kernel (CM7), Hypersensation firmware.