I upgraded my PSU moments ago and dropped in a second 7600GS 512, then configured SLi on the nvidia control panel. I ran 3D mark to see how my new system would perform, and I noticed a constant red flash. when 3D mark finished, I loaded up far cry, and the red flashing started again. I am not experiencing the color distortion under normal viewing conditions, it seems like the phenomenon only exists when the cards are being pushed... any ideas ?