GTX 1080 running less than optimal. I have a an i5 6600k at 3.50ghz, h170 pro gaming motherboard and a tx 750 corsair psu. I run Fallout 4 40-80 fps at max settings (1080p) when it should be running at much more than that, I was first able to run doom at max settings at 200 fps (1080p), now it has dropped. I really need to know what is going on. Thanks!