Low FPS with a GTX 1080ti

[Battlecraft]

Ill start out with my specs:
i7 7700k
GTX 1080ti FE
32GB RAM
H100i V2 cooler
ASUS 270e mobo
1000 watt platinum corsair PSU

Okay, now to the issue, I downloaded the newest nvidia driver a couple days ago. Everything was fine. I was running rainbow six siege at about 80-90 fps ultra at 4K easy. I was playing sniper elite 4 at about 80 fps ultra 4K. So a couple days later, I buy fallout 4 on steam and download the 55GB texture pack and PUBG. I start up fallout before the texture pack downloads and I notice it's capped at 60fps (not sure if that's normal). Weird, I thought. So I close out of the game and let the texture pack and PUBG finish downloading. I'm basically falling asleep as they are finishing up so right when they finished, I turn my PC off. I get up the next morning and start up Rainbow six siege. It's struggling to hit 40 fps on the same settings as yesterday. Sniper elite is struggling to hit 60 now. I deleted and reinstalled the drivers, deleted the Xbox app, and restarted my pc. No difference. I'm not sure what could have caused this. 1440p seems to run at the fps 4K was running at. Could it be my monitor causing this? Any help would be greatly appreciated.

 

[Battlecraft]

I forgot to add that I tested rainbow 6 benchmark with msi afterburner installed and GPU usage was at 100% with the same results.