Try a looped timedemo 1 of Quake 2 RTX with highest settings and global illumination on high, demo demo1.dm2. I bet your machine crashes
Quake 2 RTX is a much better GPU stress test than Timespy, Heaven or any other benchmark. Ideal for GPU only stress testing
I highly expect someones overclock could be perfectly stable in Timespy for hours but run a Quake 2 RTX loop with high global illumination in high res and it'll fall over after 15 minutes.
From
@Rroff
Stick this in a file called something like loop.cfg in the baseq2 folder then \exec loop in the console:
timedemo 1
alias l1 "demo demo1 ; set nextserver l2"
alias l2 "demo demo1 ; set nextserver l1"
l1
It will stop briefly between demos to reload the file though - so ideally you'd want to record a longer demo and/or not set timedemo.