I happen to have both of these cards. The Nvidia GeForce 6800 from my four year old Dell XPS 600 and the ATI Radeon X1300 PRO from my somewhat newer Dell Dimension E521, both 256mb video RAM. I am trying to figure which is better, benchmarking wise. Issue is there is no benchmarking on the plain 6800. Would anyone knows which cards seems to perform better in most gaming environments (first person shooters, stragety, etc.)?