Game will not run above 10-15 FPS regardless of settings
I've tried messing around with all of the options, setting everything to low, etc., but the game has very low fps in the menu (around 25-30 on high at 2k) and during gameplay with movement/combat it drops to single digits. There doesn't seem to be any excess load on my CPU or RAM either, and looking online, people with the same card are reporting similar performance issues, while people with weaker GPUs run the game fine at high settings. I also recently replaced a GTX 980 TI, and this performance is far worse than what I was getting with that card.
My specs are:
EVGA GTX 1080 8GB