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ASUS ROG XI extreme+ I9900k changing frequency from 5ghz to 800???

Jacek12
Level 7
Hi guys.

at the beginning I apologize in advance for spelling english is not my first language but if you want to help me 🙂 and you don't mind the twisted word thanks

so I manually set i9900k for 5,1ghz 1,370v temp 80 +-5 using this guide ( https://www.youtube.com/watch?v=95Ujni7-fVM ) tested with

CPUID CPU-Z hwinfo and CinebenchR20

the only problem I have is CPU freq drop from 5,1ghz to 800 some time 3200 or 2800 and jump but when pc is in ,, use " I have stable 5,1gz

voltage and bios setup is done from this guide
setup
I9900k
AsusROG XI extereme
watercooling

thanks for any ideas
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2 REPLIES 2

Jacek12
Level 7
Power saving (c states) are disable in bios
https://imgur.com/a/XsCMrNj

Enable High Performance power plan in Windows 🙂