I disabled Loadline calibration on my GD65 board, so the voltage doesn't drop under load anymore, but rises somewhat.

I used the following settings:

Vcore: 1.4v (Load: 1.42v)
Vddr: 1.65v
Vtt: 1.4v
PCH: 1.9v

I used QPI divider of 16 and mem 3. Intel EIST / Turbo and C1E were turned off.

I didn't manage tot get 4Ghz stable at these settings. Even 3.85Ghz was not prime stable, generating errors after a few seconds.

I'm running 3750mhz now @ 1.28vcore and 1.2vtt and it works just fine, no errors so far in Prime.

Does anyone knows what I can check to get my CPU to around 4Ghz ?