I'm bout to be totally rebuilding My desktop, and I've never used cross-fire before, the games I play, are Civ 5, WoW, Crisis, and a few older games, games in the future I'm a want to play are Diablo 3, and the DC Universe, so My question is. Is Crossfire really needed on the new build? I'm a be upgrading, mobo, ram, cpu, probably going with a SSD, and vid card or two depending if crossfire is needed. Thanks