I have read lots of different things on this.Some people say that the full crossfire makes a difference some people say it doesnt.I know that the p45 is supposed to OC higher which is what I am mainly interested in due to making a long term build with a quad that I am planning .Still not sure about running more than 1 video card.I am also planning on getting a larger monitor (1900 X 1200) but If the hd 4870 X2 is really good when it comes out I may just settle for that one at that resolution.I hate the feeling of buying 2 lower cards when 1 higher would work as good and have higher resale value.Although with crossfire you can buy another of those cards when the price drops to extend life of system.Hmm Anyone have any opinions on this?