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Windows 7 Power settings - High performance - & Adaptative voltage useless

Neronne
Level 7
Hi,

1st of all i apologize for my english and hope my topic will be understandable.

I overclocked my i5 6600k on Maximus VIII ranger. I reached 4.2 Ghz for 1.21V in adaptative voltage. After doing some monitoring and stress test i figured my voltage was always at 1.21V (during stress and while doing nothing).

I found the reason : My windows 7 performance mode is automaticaly set to "High performance", so my CPU is always at Max Clock frequency and max voltage. My adaptative voltage is then useless...

I turned my Windows 7 performance mode to "Balanced" and it works fine.

Now here is my issue : When i launch any stress test, or launch any game, my windows 7 performance mode automaticaly switch back to "High Performance", and when i stop my game / stress test, it stays on "High performance", so my voltage / freq stays at the highest values.

After having done few researches on the web i think automatic power setting switch (auto High perf) is due to BIOS setting.

Any idea which BIOS setting i need to turn on/off to avoid this automatic switch (windows power setting "High performance mode") when i launch a game ?
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No i dont have AI suite.