Question / Help OBS Lagging Games from being open!

[Claaaws]

Hi there,

I have a computer running OBS Studio (most recent version) and I am testing this running a standard game capture with Minecraft. Minecraft runs at about 500 frames, however the second OBS Studio is open it drops to about 20 FPS. I am running windows 7 at the moment and have no intentions to upgrade to windows 10 at this time. I am running a quad monitor setup and have unplugged all but one monitor to see if the issue was a funky refresh rate mismatch. I have maximized the GPU settings with the NVIDIA control panel for Minecraft as well as obs64.exe. This issue occurs with any game I use. CPU is never maxed never above 25%, GPU never goes above 11% (I am running two cards in SLI config, never taxes one card heavier than the other).

PC SPECS
GTX 970 SSC (1)
GTX 970 SSC (2)
i7 3700 3.4 ghz
32GB RAM

LOGS:
obs log streaming minecraft with JUST a game capture, (please let me know if something is wrong with this log unfamiliar with obs logs)
https://pastebin.com/9Lc1y34T

GPUz LOG

Things I have tried
- I have tried disabling the preview window the lag still occurs.
- I have tried toggling vsync off within nvidia
- I have tried turning down settings for OBS
- Tried using Window Capture as apposed to game capture
- unplugging monitors
- Turned down Minecraft Game settings, capped FPS lock 30.
- Obs Classic lags in game capture as well.

Help is much appreciated!!

 

[R1CH]

Dual GPU setups cause nothing but problems and are not really supported.

 

[Claaaws]

Dual GPU setups cause nothing but problems and are not really supported.

Sure, I have unplugged and removed the second card as well as disabled all things related to SLi and surround. Issue persists.

 

[R1CH]

Please include a log from that session. https://obsproject.com/forum/threads/please-post-a-log-with-your-issue-heres-how.23074/

 

[Claaaws]

Please include a log from that session. https://obsproject.com/forum/threads/please-post-a-log-with-your-issue-heres-how.23074/

Sure, https://pastebin.com/vzKG3Jwx
SLI disabled, second card removed. Game lags without being even open in a window capture, game capture etc. Just with OBS open.
Also reinstalled OBS clean with one scene being a game capture.

 

[Narcogen]

OBS operation is not free; it renders frames when open, even when not streaming or recording, because it's primary function is as a video compositor and switcher.

You're running 3 displays, a game, AND OBS on your 970. You are massively overloading your GPU:

14:46:53.467: Output 'adv_stream': Number of lagged frames due to rendering lag/stalls: 1992 (51.5%)

https://obsproject.com/wiki/GPU-overload-issues

Looking at your logfile I'd suggest dropping your canvas resolution to 720p and resizing your scene elements to fit.

14:44:09.163: - source: 'Display Capture' (monitor_capture)
14:44:09.163: - source: 'MINECRAFT' (game_capture)

Also, combining display and game captures in the same scene is non-performant and can cause reliability issues.

 

[Claaaws]

Temporarily fixed.
Using an old version of OBS Studio from 2017. Fixed all lag issues. Running 1080p with all monitors connected and SLI :). 175 FPS on tested game. I will keep this thread open for now and update if I can fix the most recent version.
Thank you for the help.