Also, for those running Crossfire how is the scaling on your systems? Afterburner says the second card is getting used most of the time, but for some reason 60FPS feels more like 30 or 40. Around 90FPS or so feels like 60 would in a normal game. It's hard to explain, but I'm definitely not having good luck with Crysis 3 running properly.
Specs:
3770k @ 4.5GHz
Two 7970 Black Edition 1000/1425
8GB Corsair Vengeance
Windows 7 Pro x64