I have a PNY GTX 770 2gb. I am saving up for another Graphics card...got about $250 saved just for a future card. lots of variables are art hand with Mantle and even MS stating that they are planning to improve Direct X. So there is some interesting technology to come over the next few years.... I really like being able to max games out and get the best performance possible and I am starting to hit a choke point with my GTX 770 on some games. Sli is a good option and the cheapest for a performance gain but I would prefer to have one powerful GPU for a couple reasons. A gtx 780 ti is the big one right now and costs less ro the same as the R9 290X due to the price increase making it a compelling value of the two. I have heard that MS is planning a new DX and I wonder if that would require new hardware and maybe even Windows version "X" If you would like to get back to me on this topic please do feel free to say whatever you think. I am not quite sure if my GTX 770 is going to be enough for another year based on what i have