If I use two graphics cards, can I still play with NVIDIA Surround? (Please read the body to know what I mean)

EDIT: It did not work (read comments for more info on what I did or pm me if you want more info on what I tried).
Hey everyone.
I have a really quick question regarding triple monitors. If I have my main monitor plugged into my primary graphics card, and the other two monitors plugged into my second graphics card, will I be able to use NVIDIA Surround (triple monitors)? Just in case it matters, these cards will not be running in SLI (they are different cards).
Thanks in advance.