title says it. was wondering what would be the better way to go. I have all 3 cards now and am currently using the 670 4 gig card. im just wondering if using 2 x 6950 cards with 2 gigs on each, would be better than my 1 670 4 gig card. im running at 1080p, and play all shooters and currently wanting better performance out of crisis 3, hence was wondering if a xfire set up will be better than 1 670. if so, how much better, and should I sell the 670, keeping the 2 6950's, or sell the 6950's, and get a 2nd 670 when they come down in a while? thanks