Question RX 6700XT failing VRAM

[nishaburiy]

For the past week or so my PC had been crashing constantly during games. I wouldn't get a BSOD, it would just go straight to a black screen, sometimes immediately restarting, sometimes staying on with a black screen until I manually power cycled it. Windows event viewer also never showed any errors.

I've run a bunch of tests and I seem to have figured out how to replicate it:
8 hours of Memtest86 showed no errors.
1 hour of Prime95 Passed.
1 hour of OCCT Power Test passed.
1 hour of OCCT GPU test and multiple runs of Superposition all passed.
~10 minutes of OCCT VRAM test replicates the same crash.

So I'm guessing it's pretty safe to assume that my 6700XT has a couple bits in the VRAM that are acting up. Now what I'd do next is trying to underclock my VRAM, except Adrenalin has a lower limit of 100% (2000 MHZ) set on my clock, and I also see no way of me increasing my VRAM voltage to try to increase stability. I'm at a loss on how I'd go about fixing this issue. Unfortunately my financial situation doesn't really allow me to buy a new GPU at the moment.

Specs:
Ryzen 5 3600
RX6700 XT
ASRock B450M PRO4
CoolerMaster 850W Gold V2

TLDR: VRAM is unstable. Can't underclock or increase voltage to fix. Help!

 

[Lutfij]

CoolerMaster 850W Gold V2
How old is the PSU in your build?

ASRock B450M PRO4
BIOS version for your motherboard?

I would ask you to source(borrow, not buy) a reliably built 750W PSU from a friend or neighbor and see if power the system with that alleviates the issue. Have you tried undervolting your GPU? What sort of temps are you seeing on your GPU? On that note, what is the make and model of your case? Number of fans and their orientation in your case?

 

[Gururu]

Is it only in games? No issues with computer use like browsing, streaming, video playback or other applications?

 

[nishaburiy]

CoolerMaster 850W Gold V2
How old is the PSU in your build?

ASRock B450M PRO4
BIOS version for your motherboard?

I would ask you to source(borrow, not buy) a reliably built 750W PSU from a friend or neighbor and see if power the system with that alleviates the issue. Have you tried undervolting your GPU? What sort of temps are you seeing on your GPU? On that note, what is the make and model of your case? Number of fans and their orientation in your case?

The PSU is less than 4 years old. It's always kept dust free. Running a stress test with GPU and CPU at max power draw surprisingly don't crash the system.

I actually have no idea what the BIOS version is. The motherboard was bought used about 3 years ago when I migrated to SFF. Do you think it's worth updating it?

I wanted to try undervolting the VRAM itself, but the only voltage controls I get are for the SoC. Temps are completely fine. Rarely every over 60 in stress tests. Mid 50s during gaming. The case is a TechWare fusion that I run without a side panel. I have two blowing out of the case and the case has modded feet so that the GPU can breath. Temps have never been an issue with the system!

 

[nishaburiy]

Is it only in games? No issues with computer use like browsing, streaming, video playback or other applications?

Only in games, and when I run the OCCT VRAM test. No other crashing during normal use or any other stress testing.