I have 2 GTX 770s in SLI and fps is pretty smooth on all ultra.
But for some reason, everything will freeze for a couple seconds, then resume normally. This happens pretty regularly, sometimes like every 30 seconds or every minute. This makes for pretty low enjoyment of the game for me, as this has gotten me killed in combat on several occasions.
Not sure what to do, as this does not happen in any other games for me. I installed new drivers today, and the problem still persists.