I've had more problems with my Ati than I ever did with my Nvidia. The only reason I have my ATI is so that in Age of Mythology it doesn't look like water is land, my troops don't turn black when I give them bronze armor and about a dozen other things. But I keep my Nvidia around because it has pixel shader for Invisible War, Punisher, and Snowblind. (what can I say, I'll play anything...)