I have a Benq XL2720T monitor. I have gtx 580 feeding it at the moment. I'm thinking about switching for gtx 780 and getting two more displays, to make a surround system. But I don't know if two extra monitors will display image with 120hz. The main one connected with dual-dvi sure, but the rest?
It will do two just fine, but you will need to use an adapter on the display port. I don't know alot about connections and the like but I gather its an expensive one to make it work, someone on the Nvidia forum had trouble doing it off one card.