Start with these:
1. The Hardware-accelerated GPU scheduling ("HAGS") feature in Windows is currently known to cause performance and capture issues with OBS, games and overlay tools. It's an experimental feature and we recommend disabling it via
these instructions.
2. We recommend that "Game Mode" be enabled for maximum gaming performance. Game Mode can be enabled via the Windows "Settings" app, under Gaming >
Game Mode.
3. Display and Game Capture Sources interfere with each other. Never put them in the same scene.
4. Multiple Game Capture sources are usually not needed, and can sometimes interfere with each other. You can use the same Game Capture for all your games! If you change games often, try out the hotkey mode, which lets you press a key to select your active game. If you play games in fullscreen, use 'Capture any fullscreen application' mode.
5. In the video streaming settings, set Multipass to Single Pass and disable Psycho Visual Tuning.