7800 xt undervolt and oc question.

[Clarence Boddicker]

I recently oc'd and undervolted my 7800 xt. I got the voltage down to 1055mV and memory to 2594MHz. Ive played about 20 or so hours of Ratchet and Clank a rift apart with the graphics at max settings with no crashes during gameplay.

I played for a couple of hours again tonight, again with no crash during gameplay, but the strange thing is that I got a black screen about 20 minutes after finishing playing. I was just looking at websites online when I got a black screen, I dont think the gpu was even in use?

When the pc restarted, adrenaline had reset the tuning back to default so I think that it must be the uv/oc that caused the crash.

Could this have been the tuning that caused the black screen and what should I adjust first, voltage or memory?

 

[Clarence Boddicker]

This happens to me randomly also. I’ve OC my core to 3200mhz max. 1013mv 15% power limit and 2614mgz vram fast timings. Games are fine but random browser crashes.

I think Ive got my core at 3200mhz max as well. I heard that these gpu’s are stable to about 950mV, I couldnt get mine anywhere near that though, it crashes at 1050mV. Have you tried disabling hardware acceleration on your browser?

 

[Clarence Boddicker]

The voltage might be too low, with these cards its an offset so the reported voltage will be lower than what you set. I run my card at 2575 & 1090mv & get similar performance to my nitro's boost profile with lower power. Also the memory & core voltage are shared iirc so pushing the memory is adding extra stress.

Ok cheers, Ill start with upping the voltage slightly and see if that works.

 

[Clarence Boddicker]

Well I upped the voltage slightly today to 1060mV, left the VRAM at 2594Mhz default memory timing and min frequency at 500Mhz, max at 3200Mhz.

Its fully stable in timespy and scored 21537. It was also stable while gaming. I did have another browser crash though so I disabled hardware acceleration as suggested and that seems to have solved the problem so far, fingers crossed.

 

[Clarence Boddicker]

Interesting... he's talking about overclocking the VRam here, somehow he seems perplexed that the VRam OC would work but while playing videos it might crash, sounds like a similar problem to you @Clarence Boddicker

Yes it sounds just like the problem I had. Its kind of strange how it can be game stable but just watching a video can make it black screen.

Ive had the voltage at 1070mV and VRAM at 2564 for about five days now with no in game or browser crashes, hopefully thats it fully stable now.