On the website the specifications for that card says this:
ATI Eyefinity multi-display technology2,3
Three independent display controllers
Drive three displays simultaneously with independent resolutions, refresh rates, color controls, and video overlays
Will it run four monitors? It looks like only 3.
I thought it could run six, but I must have been mistaken. It must have been something else I was thinking of, but I'm not completely sure what.