Cannot maintain 120fps, please help. Jumpy and lost frames

    I am experiencing exactly what is talked about on the main page of the PixPerAn program -- my framerate is 'jumpy', and my frames lost counter is incrementing slowly.


    I have made sure literally every program is closed on my PC, and I cannot get a smooth framerate. I have a GTX 670, so there is no way I shouldn't be able to maintain at least 120fps.


    The only way to maintain it is if I switch off VSync manually in my NVIDIA Control Panel.


    What else could be causing these frame drops? I would love any ideas as I have tried quite a bit thus far.

    Never used PixPerAn. But sounds like it must be some conflict with NVIDIA vsync.


    Do you normally have it on "Use the 3D application setting" ?

    Correct. I usually have it set to that. I believe PixPerAn has VSync on when I use that setting.


    I do know that this stutter WOULD happen if I cannot maintain 120fps(my refresh rate), as the monitor will drop the frames to 60 for vsync.
    However I should absolutely be able to maintain 120fps on this program, so I think the root of my issue is that I am dropping frames for some reason.


    Would love any ideas.