

Hi, sorry for my english in advance.
This is my first pc build, all seems fine except one thing.
If I Enable the Expo setting in my BIOS, all work fine. Pc boot up and no errors, i can watch youtube/film or any normal task. The problem is when i try to play a game, after 15/20 minuts it crash and close. So i Tried to disable EXPO and run it at 4800mhz, and all is fine. I can play for hours without any crash on desktop.
My components are:
Ryzen 7700X
Rx 9070 XT
Msi b650 Gaming wifi P
Corsair DDR5 6000mhz (CMK32GX5M2E6000Z36)
PSU 850W Gold Plus
Apparently I can keep it stable around 5400mhz. If I try to bring it to 6000Mhz after 10/15 minutes every game crashes.
I tried an OCCT lowering gradually and I could only get stability on 5400mhz in 1 hour of testing with 0 errors.
My Temp are totally fine. GPU (30-35 idle 45-55 load) CPU (40 idle 60-70 load) RAM max temp 50 degree under test.
Any advice?
Maybe should i change something in the BIOS?
Dram Voltage to 1.4V?