I have been thinking of getting an Alienware area 51 triad, though there is one thing I can't figure out: How exactly do the triple graphics cards function? Do they function together? (Like the three video signals being tied into one output) Or do they work separately? (i.e. having three different video signals?) If you look on the back of the computer, you can see video outputs for all three graphics cards. (though this could possibly mean only one output is active...) But I am unsure.