First off two monitors does not mean anything to the power supply. Your monitors are plugged into their own sockets. Thinking you may want to use a second GPU is not the same as knowing down the road you will need one. Video games DO NOT need a second GPU. Video, CAD, Complex equations do. Yet, it does not add to your GPU as far as two 1gb GPU's does not equal 2gb of GPU rather it mirrors the other GPU. Hence having to buy the exact same GPU to work in tandem with each other like when you so RIAD or stripe HDD's together. If you are going to add a second GTX card (which I doubt very much) over buying a better bigger card later instead, with more Ram say a 3gb 680 will get you there. After all I paid 750.00 for a 2gb quadro card for video editing. 2 gb is plenty big these days as most software will utilize your Ram to render etc.... Like I always say, "Most people do not see anything over 12mp in a digital camera, yet they sell 16-18 and 24mp." Those are for sales people to sell something to the uneducated who think having more Mega Pixels will make them shoot better pictures. If I gave you the most accurate rifle in the world, that does not mean it will make you shoot any better, nor does it mean that you would ever use it's capabilities, if plinking and not sniping.