Umm, you are all argueing.. Cut it out! Look, the 6600GT is better then the 6800 (non GT), since it has higher RAMDAC speeds, and if he is going PCI Express (which hopefully he is since he can do SLi....) then you can do dual PCIe 6600GTs for less then $400.... 6800 is slow... Friend has one, and my sister has 6600GT with almost the same setup, and she beat him in 3Dmark03 by 3,000!!!! Now, that means something. Honestly, get the 6600GT card. Or, better yet, fork out a bit more for the AGP 6800GT. I will provide a link below for a well priced one. GL, and decide well.