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Game frame rate jitters, despite the FPS and frame time count being steady


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#1 draqen4

draqen4

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Posted 05 June 2018 - 07:14 PM

I'm trying to diagnose a weird fps issue that I'm having with a bunch of games. It's like the frame rate isn't consistent and it'll suddenly hiccup and skip a few frames, giving me jittery movement. Here's a video of it happening in slowmo: https://youtu.be/ww26i54fWbY follow the motion of the big yellow bird, and the guard next to it. It jitters quite a bit.

Yet, using riva tuner, it shows that my fps and frame time are very steady. What's going on? I've tried v-sync on/off. Triple buffering on/off. G-Sync on/off. 165hz 120hz 60hz. Different monitor. It just keeps on jittering. I'm using Windows 10.

What does seem to help however is capping my fps by a large margin? If I turn g-sync off and then set vsync to "adaptive half-refresh" the jitter goes away, at the expense of cutting my fps in half. Is there something I can do to remedy this without having to cap the fps so drastically? Final Fantasy 12 forces my monitor to run at 60hz, so using half-refresh caps the game to 30fps.

Thanks



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