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[Q] something about lowering the voltage

10th May 2014, 10:53 AM   |  #1  
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Lowering the coltage can help with heat and battery.I flashed the ElementalX kernel,but flar2 didn't tell much about lowering the voltage.
My PVS number is 3,so how much voltage should be lowerd?Not only the minimum,but also others.
I may lower it too much(-100mv),then I got a reboot while playing videos.
Thank you
10th May 2014, 03:35 PM   |  #2  
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Quote:
Originally Posted by a1317931279

Lowering the coltage can help with heat and battery.I flashed the ElementalX kernel,but flar2 didn't tell much about lowering the voltage.
My PVS number is 3,so how much voltage should be lowerd?Not only the minimum,but also others.
I may lower it too much(-100mv),then I got a reboot while playing videos.
Thank you

Check this guide

http://forum.xda-developers.com/show....php?t=2469261
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10th May 2014, 08:46 PM   |  #3  
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Quote:
Originally Posted by a1317931279

Lowering the coltage can help with heat and battery.I flashed the ElementalX kernel,but flar2 didn't tell much about lowering the voltage.
My PVS number is 3,so how much voltage should be lowerd?Not only the minimum,but also others.
I may lower it too much(-100mv),then I got a reboot while playing videos.
Thank you

Overclocking will effect the heat too. The Voltage can be adjusted but most of the time don't need to be fooled with.

Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
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10th May 2014, 09:39 PM   |  #4  
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There is very little effect on battery by lowering the CPU voltage. There is a thread somewhere here on XDA where they do out the math and the energy savings from reducing CPU voltage are like 1% or something super low like that. The CPU uses very little power when you compare it to everything else in the tablet, like the 1080p screen, wireless, etc etc etc. Additionally, the overall power used by the CPU is based on both the clock speed and voltage, with high clock speeds being the major contributor to power consumption. Using a power scheme which does not ramp the CPU frequency as quickly or even underclocking the cpu will yield much greater power savings and heat reduction than voltage reduction ever will.
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11th May 2014, 04:21 AM   |  #5  
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Quote:
Originally Posted by Hnk1

Check this guide

http://forum.xda-developers.com/show....php?t=2469261

well,I mean,the volatage of CPU,not the battery...
anyway,thank you
11th May 2014, 04:30 AM   |  #6  
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Quote:
Originally Posted by LinearEquation

Overclocking will effect the heat too. The Voltage can be adjusted but most of the time don't need to be fooled with.

Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app

I just use the stock frequency.I like reading,high performance isn't needed,so I just want to increase some battery life,some people in tieba told me that lowering cpu voltage can make some great help...
11th May 2014, 04:39 AM   |  #7  
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Quote:
Originally Posted by skrypj

There is very little effect on battery by lowering the CPU voltage. There is a thread somewhere here on XDA where they do out the math and the energy savings from reducing CPU voltage are like 1% or something super low like that. The CPU uses very little power when you compare it to everything else in the tablet, like the 1080p screen, wireless, etc etc etc. Additionally, the overall power used by the CPU is based on both the clock speed and voltage, with high clock speeds being the major contributor to power consumption. Using a power scheme which does not ramp the CPU frequency as quickly or even underclocking the cpu will yield much greater power savings and heat reduction than voltage reduction ever will.


oh,it make sense,some people in tieba told me that lowering cpu voltage can make some great help with heat and battry life,look like they misled me,I have nerver noticed the diffrences in heat and battery, only the unstability is obvious...
thank you
13th May 2014, 12:40 AM   |  #8  
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Quote:
Originally Posted by skrypj

There is very little effect on battery by lowering the CPU voltage. There is a thread somewhere here on XDA where they do out the math and the energy savings from reducing CPU voltage are like 1% or something super low like that. The CPU uses very little power when you compare it to everything else in the tablet, like the 1080p screen, wireless, etc etc etc. Additionally, the overall power used by the CPU is based on both the clock speed and voltage, with high clock speeds being the major contributor to power consumption. Using a power scheme which does not ramp the CPU frequency as quickly or even underclocking the cpu will yield much greater power savings and heat reduction than voltage reduction ever will.

Especially with all things considered, the CPU is mostly loafing along. It doesn't start drawing power until it's being asked to work. Lowering the voltage is asking for a laggy device when the chips are down.
15th May 2014, 01:35 AM   |  #9  
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I highly suggest lowering the Cpu clock speeds if you want to affect the heat and battery. Lowering the cap speed for the device doesn't allow it to work hard enough to reach speeds to really make it toasty. Same goes with battery life. For example, I'm sure that you can walk much farther than you can run.

Changing the voltage is the equivalent of running down a new street...you have to test and test before you find a good voltage. Every device is different. Someone else's device might do great with the exact same settings that are making your device reboot. Do a lot of reading if you are certain that you want to change the voltages.

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