Originally Posted by hell_of_doom227
HD4870X2 is just crossfire of two HD4870 so your GTX280 is still fastest the card.
Read how its design is different from normal crossfire and try again.
Anyways enjoy you gtx280
. Mine is working great so far at 2560x1600 (although like you said I'll be dumping the gtx280 for hd4870x2 soon).