I rolled back my Nvidia driver and that seems to have fixed the issue although not sure why. But I am back to 60 fps. Would this be a bug to report to the developers or take it up with Nvidia?

Yes this is happening even with a new game with default settings (max fps 38 on new game). No other games I have are showing any new or unexpected frame rate drops

First off, great game. Have clocked about 40 hours since it was released on steam and until recently everything was fine with a good frame rate and no screen tearing. But for some reason I am now not getting better than 36 fps with noticeable screen tearing whether vsync is on or not and dropping ...