At high resolutions, you will have to rely on Crossfire/SLI if you want eye candy at high resolutions, but if you play below 1600x1200, any HD 4890 or HD 4870 1GB will suit you nicely. The HD 4850 X2 is a beast of it's own but you won't want to deal with scaling issues when they appear. In the Guru's 3D interview with Dave, he stated that soon will be incorporated an option that allow the users to select the best rendering profile for a game when there's no default profile for it, like nVidia does currently. But still none of the multiple GPU solutions are 100% trouble free.
Originally posted by: Leyawiin
The HD 4850 X2 is a dud:
http://enthusiast.hardocp.com/...wxLCxoZW50aHVzaWFzdA==
Recent review comparing it to a GTX 275. They weren't impressed.
Call of Duty 5 was slighly faster with slighly higher min, average and max FPS
Crysis Warhead was only playable in Gamer, we all know that Crysis doesn't scale very good with multi GPU setups, so is a win for the GTX 275 which allowed for higher quality settings.
Fallout 3 was a clear victory for the HD 4850X2 which had better fps across all scenarios.
Far Cry 2 was almost a tie giving the sligh edge to the HD 4850X2
FEAR 2 was a clear victory for the HD 4850X2 which mopped the floor with the GTX 275 with higher min, max and average FPS.
GTAIV was slighly slower than the GTX 275 which allowed for higher eye candy, but like Crysis, GTAIV is a game which doesn't benefit of multi GPU setups.
Overall, the HD 4850X2 is slighly faster than the GTX 280 when there are no scaling issues, but from those 6 games, 2 didn't scale well enough, if you go to the HD 4870X2, when it doesn't scale wel,l at least it would be as fast as a GTX 260+ which is not a slow card by any standard, but that's up to you if you like to deal with multi GPU issues.