Anyone notice a trend when games use PhsyX drivers the 4800 series doesn't do very well? For example:
-Mass Effect
-GRAW 2
-Front Line Gears of War
Guru3d
Driver Heaven


However, when DX10.1 is used even the 3870X2 can compete with the 280.
Assassins Creed with DX10.1:
Computer Base
Tech Report


Assassins Creed DX10:
Driver Heaven
Anandtech