Hi All, I have a macpro 4.1 (2 x 2.26 quadcores) with 32gb of ram. I am running a dell 30 in monitor (2556x1600) and a samsung 20 in monitor (1600x1200). At first I ran just the 30 inch and all was fine. Now with 2 monitors hooked up after a while about 1/2 hours the monitors act weird. I get ghosts of windows and images: any ideas?