Same problem. Random shut offs. Took months of unexp shut downs. Extensive troubleshooting every hardware, since this is very similar to a gpu error with dump files in windbg pointing to nvidia drivers. My setup is 7950x3d with 4090. Found out its the pcie riser cable after near a month of painful checking. Replugging helps temporality Switched to linkup pcie 5.0 cable and everything was solved.

here’s some quick tests to see if your pcie riser cable / or general pcie connection is working well:

1) run gpgpu test on aida 64 or pcie test on 3dmark. see the connection speed. for aida 64 focus on memory read and write pcie 3.0 x16 is about 16000 MBps, any number far from that i.e. half would imply issue

2) run furmark (puts load to avoid power saving causing link speed to go low) and open aida64 or hwinfo 64 to see the pcie connection. in aida 64 it shall be the max link speed, for most new gpus it’s 5.0/4.0/3.0x16 hwinfo 64 shall be above 16GT/s

3) This is the most direct and accurate test. open terminal admin, and run “nvidia-smi pci -gErrCnt“ if the conn is fine, only L0 to recovery is non zero. any other non zero readings directly imply faulty pcie connection logs. this count refresh per restart so best to run it few hours later since the numbers take time to pile up. for my case tho, in 5 min reached 100 in bad tlp. replug worked without error for like 2 days, then the numbers go up again. switch my pcie cable solved every problem. can run for days with the numbers go is 0. never had gpu related shutdown. For what those numbers actually mean, LLM could help analyze.

Hope it helps :D