Originally Posted by Piggus
The X850 quite a bit more powerful than the 7600GT and is a pretty big step up from the X700 actually. I noticed a pretty big difference between even the X800 pro and the X850 XT PE.
If you're upgrading now though, SM3 or even a DX10 card is the way to go.
You'd be better off with the 7600GT, as it supposedly supports improved shader models and stuff.
Dunno, really. 7900GT is the way to go imo.