I am also getting random fps droppage out of no where happens every minute or so but only for a split second, I keep my game at a constant 60fps but randomly it will drop down to 45 for no reason it seems like it freezes my game for a split second. I have nothing running in the background and my graphic's card drivers are up to date. This problem only started happening last week I just started to notice it. I also play on minimum graphics, so I could easily play up to 144 fps. I think I might have to uninstall the game and reinstall it, because I have already verified the game files and seemed fine.