" ........Sorry....Wrong. Mac Pros support nVIDIA........" -Sorry my bad, but still you don't have much choice i mean no FX 1800?, i had a MAC at work a while ago which had a defect videocard so i browsed the net and searched for a card and found one for a Macpro so i ordered the damn thing and placed inside the macpro and fired it up shortly after that i get this nice gradient fall over which means your ****ed so i thought motherboard and called MAC support(nice people btw) so what was it? I had to order the same card but with a different firmware version or something, because the Macpro i had was from early 2008 and the card i ordered was only suitable for a late 2008 MacPro ....Bollocks. If a MAC works it's brilliant but if something goes wrong you're f*cked (if you are not some Unix expert). So my advice still is buy a PC install Linux if you are not happy with windows and you have a lot more flexibility with both hard and software