The 7800 GTX is about 20% faster than the 6800 Ultra, actually more worth of the title of 6900 than a new generation. However, where it really shines is in its image quality and its AA. Basically, it is much more efficient at implying anti-aliasing without sacrificing too many FPS. Also, it includes something called transparent AA which will anti-alias things like foliage or chainlinked fences, that were not anti-aliased on previous cards. As far as performance/image quality, you can't beat the 7800GTX now. But when it comes to price/value, the 7800GTX doesn't look all that great when you can get a 6800 GT for $280 and overclock it to 6800 Ultra speeds, which in reality is only marginally slower than the 7800GTX.