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Undervolting Intel I5-8300H (ASUS N580GD)


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Posted (edited)

Hi,

I under-volted my CPU in Windows and I know these values are stable. (I've torture tested it for 16 hours with Prime95 small FFT's. Did some video encoding with Handbrake used the system for 2 weeks and finished Half-Life Black Mesa without a BSOD) This under-volt makes a massive difference in temperatures!

Can I use these voltages in MacOS too? What would be the recommended way? Add the VoltageShift kext to OpenCore or is there a better way?

Do I need to re-make CPUFriendDataProvider.kext?

Throttlestop settings:

  • CPU Core: -0.1650mV
  • Intel GPU: -0.0703mV
  • CPU Cache: -0.1650mV
  • iGPU Unslice: +0.0mV
  • System Agent: -0.0703mV
Edited by Denisuu
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Posted (edited)

Adding the kext above to OpenCore seems to work. I'm testing system stability now before I make it permanent.

./voltageshift offset -165 -70 -165 -70
--------------------------------------------------------------------------
VoltageShift offset Tool
--------------------------------------------------------------------------
Before CPU voltageoffset: 0mv
Before GPU voltageoffset: 0mv
Before CPU Cache: 0mv
Before System Agency: 0mv
--------------------------------------------------------------------------
After CPU voltageoffset: -165mv
After GPU voltageoffset: -70mv
After CPU Cache: -165mv
After System Agency: -70mv
--------------------------------------------------------------------------

Edit: After a day of testing I moved the voltageshift script to /Library/Scripts/VoltageShift then ran:

sudo ./voltageshift buildlaunchd -165 -70 -165 -70 0 0 1 -1 -1 -1 0

This makes the values above permanent.

Edited by Denisuu
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