That's because, the X1950PRO is slightly better, when both are at stock speeds. But when you overclock the 7900GS, the 7900GS beats it. But why, won't you go for the X1950XT. Like Sora said, it is a very powerful card for the money, and it beats the 7900GS and X1950PRO. I believe, it has a good ability to overclock too.