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Root Efficacy of undervolting

Very interesting. I don't use the performance governer, just limit my frequency. I've had a failure at about the 400MHz range before. I haven't been that brave to drop the voltages too far on any of them. I need to try to crash my phone at work to day.
 
I think there are possible bugs in setting up certain frequencies. I had freezes when I try to step down the voltages from defaults by 25 mV increments. But if I jump straight to have everything at 600 mV 61-1024 it runs fine.
 
My phone will reboot if I set the 62mhz frequency below 725 volts. Doesn't happen rite off the bat but any time I go below 725 it reboots soon after going idle.
 
Whyzor said:
I think there are possible bugs in setting up certain frequencies. I had freezes when I try to step down the voltages from defaults by 25 mV increments. But if I jump straight to have everything at 600 mV 61-1024 it runs fine.
Click to expand...

Sounds like evidence that 600 is below whatever minimum valid voltage, (hardware vr limits?) And is defaulting to... Something higher?
 
thangfish said:
Sounds like evidence that 600 is below whatever minimum valid voltage, (hardware vr limits?) And is defaulting to... Something higher?
Click to expand...

Actually it's the same at 800 or 750 or 650 before, 600 was just the most recent Mantera & I suspect the min to be according to the voltage regulator spec sheet. I think it was discussed in theOC's thread.
 
I've been running stability tests all day and I've found the following frequency/voltage pairs to be stable. I'm not going above 1.4 GHz.

61440: 700
122880: 700
245760: 750
576000: 900
768000: 900
1024000: 1000
1113000: 1050
1209600: 1100
1305600: 1125
1401600: 1175

I'm working my way down the list, currently working on 61-768 MHz. The 61-768 MHz frequencies might undervolt even more, but the higher frequencies have reached their 1hr stability floor. Below these values, I get reboots and lockups.
 
I currently have 61-576 running at 600 and 768-1024mhz running at 700 without a problem, though I'm still not sure if it's actually running at that lower frequency and saving me batt life.
 
Yeah Prey521, I'm with you. I don't know if any of this is saving me any battery or not, the whole thing is a big black box. I press my buttons and pretend like I'm doing something significant :P

Once I have a stable set of voltages, I'd like to do some overnight battery drain tests and compare the results to the drain at stock voltage.
 
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