I just tried running it in single card mode, it worked fine! Is there no way to make SLI work? The game runs at 30~45fps on a single card, and I can feel the response lag.
Possibly, but I had not found it. If you find a way to change your Nvidia config settings to get it to work, let me know.
question, in SLi mode did you have Vsync on or off?
I had Vsync on.
EDIT: I tried SLI with Vsync off, the flickering still exists.