I currently own a single 27" 2560x1440 monitor. If I were to, say, buy two more and wanted to play games at high settings on them (at a resolution of 7680x1440), how much GPU horsepower would that require? I know for sure my two 6950's wouldn't be adequate.
I'm just trying to gauge exactly how much this would cost me.
Thanks for the help!
EDIT: Also, can I play basically any game on three monitors? Or does the functionality only exist in certain games?