To my own knowledge of the game, is that it doesnt use dual GPUs, its not SLI supported, it will run perfectly happily on one Graphics card
I don’t know how the things really work with SLI, but does the forced SLI give any benefits in games?
Dunno about SLI, but my computer has a Crossfire setup and I notice virtually no difference running 1 or forcing Crossfire... I might have it configured wrong, but as far as I can tell, I can see no difference.