It's probably worth noting that the game was originally tweaked for nVidia gfx, and as a result the nVidia GPUs run it much faster/smoother than do AMD GPUs. Yet another dropped ball that I hope is fixed in the 2.0 engine, not just a little, I want to see the full use of my rig someday.
I have yet to see my processor break 10% avg. across it's cores, and in Crossfire my GPUs don't go over 35% each, I dunno how the hell they managed to get that to happen, a VSync w/ a decimal in the wrong place or something but it's really f'd up. Even the Diablo III beta manages to use my cards, so much so that I had to turn on VSync cause who needs 200 FPS there comes a point where it's just overkill^^.

Sorry I drifted a bit there.