Specs;
7600GS 12/12 pixel shaders/textures per clock 5 vertex, 9.0c, 400/800 MHz Core/Mem
6800XT 8/8 pixels shaders/textures per clock, 4 vertex, 9.0c, 325/700 MHz Core/Mem
the 7600gs looks a better buy (the 6800xt has never been favourably talked about)