I found it's the UE4 feature of Real-time Reflections that's probably taking the biggest hit. Pretty much any setting you have without it turned on instantly drops 30% performance alone. The power of the future in one Engine feature alone lol. Also SLI isn't yet supported (future driver?) so two cards wont help you without some tweaking that may or may not work from what I hear.
Looks damn good for a mostly UE3 based game though. Still meant for those with patience or hardcore fans because of the content. Just hope they do updates fast and furiously. Think they are intentionally holding content to maintain a 6 month hype, but this gameplay isn't Payday 2.
Turning on optimized 1x1 crossfire setting for this game has helped, running high seems to get mostly 60fps, but it feels choppy.