Has anyone had any problems with a dual monitor setup with the 6800's? I am losing the signal on my primary monitor anytime I run a game or 3dmark. The monitor is going into sleep mode then will come back if I can get back to my desktop. Strange thing is it works fine when the other monitor is not hooked up. I have tried a pny 6800 ultra and a BFG 6800 OC both do the same thing.