Thanks, Vorksholk!
My R9290X (Hawaii) crashed quickly for all intensities from 23 down to 10. It seems to be stable at intensity 4, running cool at over 80% GPU usage.
I'll start working intensity back upwards again Real Soon Now to find a sweet spot.
Edit: Update - intensity 9 looks stable, whereas 10 was not in an earlier test. I'll do more careful checking as time permits, but for now the sweet spot for this rig seems to be i9.
Huh, what hash rate are you getting at intensity 9 on that card?
Thanks - it was a red herring, I now think.
I hadn't looked closely enough at the outputs (doh) and was AFK for a while. At low intensities it would display huge real numbers from time to time, but never find a nonce or build up hashrate.
I switched back to high intensity tests and found the miner no longer crashed. I now think the crashes were caused by another miner that did not shut down completely before yours started.
All is well now - I'm back to running at I23, finding nonces, with hashrate fluctuating around 700-850 MH/s so far. GPU utilization is near 100% and temperature around 80C. I'll keep an eye on that, since I burned out a few graphics cards mining back in the day.
