I have these two video cards. The X850 is somewhat better than the 6800 in some games, the 6800 is better than the X850 in a few games and Motion. I use Motion more often than playing games so I'm primarily selling the X850. It was pulled from a recently purchased Power Mac G5 and is in perfect working order. Looking for $425 or best offer for this. Email me at moviecutter (at) mac (dot) com for questions or pics. Thanks!