I always have found crossfire (and nvidia's SLI for that matter) to be a big gimmick. Not all games support it and I don't find the boost in perfomance to be worth the price of 2 cards. And by the time you wait long enough for the cards to be cheaper to get a second one there's usually a newer model that'll be cheaper and faster than the 2 old ones... Not even talking about power consumption, noise and heat!