So I have a GTX 680 FTW 4GB and looking to buy a GTX 680 Classified 4GB to SLI. Before you say "Why not get the same GPU?" Well I can't find the FTW 4GB anywhere so I'm getting the classified. Now on to the real question. What is the recommended PSU I should get for these two cards? I also run a P8Z77-M Pro motherboard, and a i7 3770k CPU @ 4.0GHz. If you need anymore specs just ask I'll give them to you. Any help is appreciated. QUICK EDIT: The PSU I currently have is a GS700 which I heard only supports 1 GPU not only that it's kind of a low watt.