How come I can get a relatively constant 70-80 fps on a certain game (PUBG for example) without vsync on, but when I turn vsync on more often than not I'm jumping between 50 and 60 fps. Shouldn't I be able to stay fairly constant at 60 fps when I have the capacity to do 70-80 fps? I'm sure there's something I don't know or that I'm missing, but this really does puzzle me. Thanks in advance for any and all answers.