I have an i7 7700K and an Asus Strix 1080Ti. When I have V-Sync off I get well a over 100 fps. However, when I enable it it begins to stutter down to the 40's and back up to the 60's even if nothing is going on. It has only recently started doing this. I have used DDU to uninstall the drivers and tried multiple different ones to no avail.