That's a lie. Game is not CPU bound. On my system (i5 2500k) it works around 30fps at max settings at 2560x1440 with single HD6950. If I enable the second card and select BF3 profile, it goes to 60 fps and control becomes much more fluid as well. There are of course artifacts with BF3 profile (flickering during the game and initially complete black till you go back to windowed mode and get back to fullscreen again) so it is not playable with that profile. But it is clearly possible to take advantage of more than one card with right profile.