Originally posted by: munky
Sm3 will not be of much use on a 7800gs, since it's barely as fast as an x850xt pe, and sm3 is usually used to add extra eye candy in games using more complex shaders. If the card is not fast enough to run the game smoothly with all that eye candy cranked up, you'll only be watching an sm3 slideshow. I really cant recommend anything in this poll, because I'd usually just pick the cheapest one, but if money wasnt an issue then I'd switch over to pci-e and not pick any of these two.
Actually the X850XT can run faster 2.0b than the 7800GS can run 3.0 because of the dynamic branching in the 3.0. That''s why to run 3.0 you need a very powerful videocard, but since the DX 10 is around the corner, why bothering to choose the 7800GS over the X850XT if the latter can run generally faster in high resolutions, and has better IQ (Not by much) and there's no effect that the 3.0 do that the 2.0b cannot do (Except True Displacement Mapping). And by the way, OpenEX HDR is not a SM 3 feature for God sakes, but the original HDR is a DX 9 feature based on different math calculations, but the OpenEX HDR is a bit more accurate, but it's performance impact...