1080ti, 4790k running at 4.4, 16gb of DDR3, everything maxed out at 2560x1440...generally get good FPS. Fluctuates quite a bit though, I can usually get 60 outdoors if not too much is happening, usually hovers around 50 in what you would call regular gameplay, never below 30. I've tried running it at 4k, but it doesn't go so well with everything maxed. It looks clear enough at 1440.
When I first started running it, it ran really awful, but then I discovered that I didn't have the newest drivers for my card.