Any way to use sli with 3 monitors

I have three monitors but i can't figure out a way to use sli for gaming but not disable one of my monitors, so i can game on one screen. Is there something i'm missing.

I have two 460s.

You need a display port for the 3rd screen,I thinkMonsieurX

thanks seem i have two guess i will go buy a cheap adaptor

Then reading around the ineterent looks likes it impossible and just a fail on nvidia part