Quote - Sharky or anyone else that runs GPU: Strangely enough, I was in the mood to give it another go last night, but checking just the GPU function, not slg, would outright crash Lux once it loaded my cards into the log. I had the workgroup set to 64. Anything else I'm missing? Driver is very latest for nivida, and am using lux rc3. 

SBT.. I had no idea what that workgroup size dealio was for.  Started tinkering around with it about a week ago and too had lux crash when the workgroup size went above 32 for me.  Don't flame me or anything, but I was under the understanding that nvidia sucked for gpu rendering and that ATI was the card of choice for gpu rendering?