Hey all, just picked up a Sapphire 7970 OC on sale to replace my 6850, and I know that the 7970 GHz is crossfire compatible with the 280x, but I haven't had much luck finding anything on 'non' GHz cards. I'm a novice at best when it comes to this stuff, and reading all of this I have no idea if my card is in fact compatible with a 280x for when I upgrade down the road.