So what do we have to say? It would seem that ATi are on the road to success with their new Radeon HD 5870 graphics cards. With two Radeon HD 4890 graphics cards performing similarly to a single HD 5870, the ideal pattern of GPU progression seems quite apparent. What's more is that with the exception of the heavily CPU bound Microsoft FSX game, ATi's CrossfireX technology seems to scale very well in all of the games tested. They are far from impractical too, thanks to low idle power consumption as well as respectable load power consumption, which has resulted in low noise levels. You will naturally require a quick processor to complement the pairing and if you're the oddball that plays Flight Simulator X, I think you'll find that elaborate CrossfireX setups will do you no favours.

http://www.overclock3d.net/reviews.p...gb_crossfire/1