I'll start by saying that my setup was working perfectly fine a few days ago. The major variable here is Windows - I ran Windows update and updated to the newest OS version (the October update).
Now when I open a game (Dark Souls 2 is what I've been experiencing it in, haven't tried anything else) it'll run fine. But as soon as I open OBS my framerate tanks. To be clear, I'm not streaming or recording, just previewing via a game capture. If I close OBS, the framerate jumps back up to normal.
I've tried updating graphics drivers (with a DDU clean), nothing changed. It _does_ seem to be related to G-sync. It occurs when G-sync is on (in either mode), but if I turn it off completely I get a steady 60 FPS in game (what DS2 is locked to). The OBS window itself does have G-sync active when it's set to "windowed and full screen" mode, but not when it's on full screen only.
Hardware bottlenecking isn't the issue. I have an 8700k and GTX 1080, plus it was working fine on the previous Windows version.
Doing some more investigation: It only seems to happen in full screen mode. If I window DS2 it runs normally. Interestingly though, G-sync only seems to work (according to the indicator) in windowed mode.
Even with a fresh install, no scenes, and no settings, it still happens. Seems consistent with being a G-sync issue.
Checked with Battlefield 1, and OBS doesn't seem to affect it. However G-sync also only works in borderless mode.
Ooookay, and now turning off G-sync doesn't seem to change anything... I'm thoroughly confused at this point.
Now when I open a game (Dark Souls 2 is what I've been experiencing it in, haven't tried anything else) it'll run fine. But as soon as I open OBS my framerate tanks. To be clear, I'm not streaming or recording, just previewing via a game capture. If I close OBS, the framerate jumps back up to normal.
I've tried updating graphics drivers (with a DDU clean), nothing changed. It _does_ seem to be related to G-sync. It occurs when G-sync is on (in either mode), but if I turn it off completely I get a steady 60 FPS in game (what DS2 is locked to). The OBS window itself does have G-sync active when it's set to "windowed and full screen" mode, but not when it's on full screen only.
Hardware bottlenecking isn't the issue. I have an 8700k and GTX 1080, plus it was working fine on the previous Windows version.
Doing some more investigation: It only seems to happen in full screen mode. If I window DS2 it runs normally. Interestingly though, G-sync only seems to work (according to the indicator) in windowed mode.
Even with a fresh install, no scenes, and no settings, it still happens. Seems consistent with being a G-sync issue.
Checked with Battlefield 1, and OBS doesn't seem to affect it. However G-sync also only works in borderless mode.
Ooookay, and now turning off G-sync doesn't seem to change anything... I'm thoroughly confused at this point.
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