I'm currently running a Gigabyte GTX 660 2GB which is beginning to struggle with newer titles, not to mention that I still can't get ARMA 3 to run at more than 25-35 FPS (1080p, no filters).
I really want to switch to AMD because they care about Linux way more than NVIDIA, but I suspect we won't get the RX480 for at least another year where I live (not to mention I'm broke).
I'd put the 660 in my home server so I can use CUDA for neural networks and computer vision and, if the card can handle it, run folding when it's idle.
Good luck to everyone, and to AMD, because NVIDIA's monopoly is getting really annoying.