I'll test on my rig in a couple of hours, I suppose. I guess I can also test on some of the other systems around the house later tonight (GTX670 4GB, 6950CFX, GTX660 Ti).
EDIT: I don't think much else stands a chance, this is what it got running on one 780 (it wouldn't do SLI despite being fullscreen, I'm wondering if I can force AFR somehow)
2014-03-26 16:40:07 - nvscene2014
Frames: 4710 - Time: 204031ms - Avg: 23.085 - Min: 0 - Max: 60
I had Vsync enabled in the demo, not sure why it shows 0 as the minimum, the minimum I saw was 12 on the overlay