slobogob, the 2900 pro is nothing more than an xt with lowered clocks. the bus width is the same on both cards from what i know. the 256bit bus must be a misprint. the only 2900 card that i've seen that has a 256 bit bus is the 2900gt. when i got mine i flashed the bios with the xt bios and it performs exactly like an xt. amd/ati just wants these things gone.
Are you sure? I checked some shops and they list it as a Pro with 256 bit. I even found some news articles stating that Sapphire would release a 2900 Pro with 256bit bus (most german, some french too). Then again, the bandwidth didn't do the 2900 series much good, so even with a 256bit bus it still is a steal.
Don't mention the 2900GT - there's not enough graphic card left to speak about.