I think my video card died about a month ago and I've been trying out some cards with no success. Here is a previous thread I made about it: http://forums.macrumors.com/showthread.php?t=808736 I just got the second card I'm trying today: ATI X800 XT AGP, and my computer will just sit at the grey apple screen with no wheel spinning. I'm assuming this is a driver issue (or something much worse)! Since my computer will not boot, I have no idea how to update the drivers for this card. Any ideas?