I get between 45 - 55 fps on medium high settings on 1080 on a 290x. Seems Nvidia have somw catchin up to do with the drivers for this game. A 980ti should get way more fps.
I don't know if there's been a major change in the game but I played this for a while and have a 980ti and with almost everything turned up I was getting around 60fps, I wasn't the only one either Devrij was the same and his build is almost identical to mine.
Has there been a patch which decreased the performance?
FYI I quit the game back in July/August.