I have a single GTX 970 in my system at the moment but I'm upgrading everything when I get my tax return back (also my 4790 is part dead from a voltage spike, getting a 5820k since I started editing videos) and I was going to sell the 970 and get either three 980 or two 980 Ti depending on what my power supply can support. It's an EVGA Supernova 850B2 semimodular.