Intel Motherboards : Asrock z390 Extreme4 issue

Author: aussie7
Subject: Asrock z390 Extreme4 issue
Posted: 25 Dec 2018 at 10:47pm

Hello I have an Asrock z390 Extreme4 and I'm having issues overclocking it :(

system is
i5 8600k overclocked to 5000mhz
gskill 2x8 16gb kit of 3000mhz ram

I have overclocked to 5000mhz in bios and when I am in windows cpu-z shows the overclock, but when I stress test with prime95 the cpu speed fluctuates between 4500mhz and 5000mhz

For some reason it won't stay at 5000mhz while under 100% load

I have tried everything I can think of and nothing seems to fix this issue, anyone know how to fix it ?

TIA :)