that's what I tried. I'm going to try it again though later this afternoon. I think it may have been another problem - my 580's develop a "ghost in the machine" a graphical rendering problem that arises out of nowhere sometimes that causes artifacts and crashes. I see it only in game, and I hadn't been able to launch a game until I reverted back to my old drivers which revealed the problem. The fix is to unplug all power from teh system for 20 seconds or so to let whatever the problem is clear. That might have been it. I will repost later when I am back at my home PC to say if it worked or not.