Quote Originally Posted by Khatovar View Post
I ran 1 card per monitor for a while. It worked well enough, except you can't run the second card with DX11, which means my main ran on DX11, but my slaves were forced to DX9. Also, the slaves were pretty unhappy swapping to the main screen/card when they were configured for the secondary card. My last system upgrade, I moved to a single card and it's IMO smoother.
I run with a card for each monitor but on my main monitor I have all screens stacked and the other is just DX_Nothing and videoFX. It works--but probably isn't much different than it would be on just a a single card. That's why I wish SLI had worked for me.