I know this is a forum for Macs only but my friend needs help because he wants to purchase a GTX280 to put in his Dell XPS 600 which has 2 7800GTX running in SLI. The motherboard is PCI-Express 1.0 (the original) so he wants to know if the card will run fine in it or if he will have to upgrade the motherboard. Please help...even though its not 4 a mac user lol