The X1800XT is faster than the 7800GTX in Direct3D titles, but in openGL, the 7800GTX is quicker. the X1800XL is targeted at the 7800GT, but doesn't really make the cut. the X1600XT is aimed at 6600GT/6800 users, its just a tad bit faster than the 6600GT but slower than the 6800. the X1300 Pro is aimed for budget users wanting something besides integrated graphics.