The beta doesn't support SLI at the moment, and according to Crytek is completely unoptimized in comparison to the retail game. I've been playing it on my 8800GTX, and while the frame rate isn't, the game look phenomenal, and I haven't had issues with the motion blur etc. A lot of people are basing a future purchase off the performance of this beta, and I think that's a bit foolish. Does anyone remember the Doom3 beta?