Hello there, I have a 08 mac pro with a 2600 display card. (Sorry that can't remember the exact model no...) I was running it tonight and suddenly some checkers appears throughout my screen and I couldn't do anything. I was forced to power it off and on again. But after some seconds, the problem appears again and now, it appears even on the boot screen and remains unchanged. Attached is the screen. Is it the problem of the display card?? If I have to replace one, is it worth and ok to have 5770 right from that apple store for AE and FCPX? I'm waiting for the 2013 mac pro, so a bit hesitated to invest more on this Mac now like the 5870.... I'm still running snow leopard. Many many thanks!!!