One of my ref Vegas doesn't seem to like the tighter timings (just been using Todxx's for now). It doesn't crash, just hashes quite a bit slower when timings are applied. Not too sure what to make of it. I tried compensating by reducing intensity (cn_config) for that card, even lower clocks, but no luck.

If anyone has a suggestion on which timing could be the culprit, fire away.

EDIT: just as I wrote, the GPU went dead. Gonna have to tweak.
EDIT2: here we go, increased --rp from 10 to 12 and that weaksauce-GPU is doing 21+ kh/s like his little buddies. Ka-pow!