strange OC issue.

axeljovan
Junior Member

09-28-2022, 03:39 PM

i have been running smoothly on a 7900x oc at 4.5ghz with 1.230v using corsair 3000mhz cl15 and 32gb ram on an asus rog rampage vi apex with an 1600w psu. today i upgraded to viper steel 4133mhz cl19 and 32gb ram, but the system kept having errors and wouldn't boot until i adjusted the cpu voltage to 1.25. i'm puzzled because earlier, even with faster ram and a different bios, it would freeze or throw q codes. now at 1.25v everything works fine and all tests passed. any suggestions would be appreciated.

axeljovan

09-28-2022, 03:39 PM #1

Barnesy28
Junior Member

09-29-2022, 12:19 AM

Assuming the goal is to operate at 4133Mhz, it's logical that the memory controller needs increased voltage to achieve that speed.

Barnesy28

09-29-2022, 12:19 AM #2

Assuming the goal is to operate at 4133Mhz, it's logical that the memory controller needs increased voltage to achieve that speed.

MehSparky
Member

193

09-30-2022, 03:50 PM

I'm using xmp profiles with two versions—4133mhz and 4000mhz—both running at 1.35v. The CPU OC is set to per core at 4.5ghz and 1.250v across all 10 cores, while the rest are auto. Could you clarify the IMC setting since it isn't visible in the BIOS? Thank you.

MehSparky

09-30-2022, 03:50 PM #3

MATTIA269
Junior Member

10-02-2022, 10:41 PM

It can be referred to by various names.
You should search for VTT, IMC, QPI/VTT, QPI/DRAM and proceed with caution when making changes. Minor tweaks might significantly raise your CPU temperature and could lead to problems or even lasting harm.

MATTIA269

10-02-2022, 10:41 PM #4

i3z___
Senior Member

559

10-03-2022, 07:32 PM

For Skylake-X, VCCSA and VCCIO offer assistance with memory OCs, though they require careful handling:
-they may crash if voltage is too low
-they risk damaging the IMC if voltage is too high
It's usually safest to leave it to auto. I haven't adjusted it yet, but I'm only running at 3600mhz.
What was the goal of this 'upgrade'?

i3z___

10-03-2022, 07:32 PM #5