[Parkar]

It's not the fact that it uses physics or not that makes a physics card useless or not, it's the fact that the game don't use it for physics even if you have one installed. I assume you mean a 6800gs and not a 6900gs since there is no such thing as a 6900 AFAIK anyway. I should probably add that I didn't have soft shadows on when running as they look like crap and is a huge performance hog.