Took first crack at using this (linux).

Works fine for a bit, then crashes one of the GPUs.  Interestingly enough, the watchdog doesn't.  :-)  YOU HAD ONE JOB, WATCHDOG!

...excerpt from debug log...
WATCHDOG: GPU 2 hangs in OpenCL call, exit



can't fall back & try older version (no linux build for pre-4.1).  If you can fix this, I'd prefer to deploy this, even with a fee.  The problem here is that it's constantly crashing at variable rates.