1. Update to Windows 10 2004 or 20H2/09 if available via Windows Update per
https://obsproject.com/blog/five-simple-tips-for-new-streamers
2. In Windows 10 versions 1809 and newer, we recommend that "Game Mode" be enabled for maximum gaming performance. Game Mode can be enabled via the Windows 10 "Settings" app, under Gaming >
Game Mode.
3. In many cases, wireless connections can cause issues because of their unstable nature. Streaming really requires a stable connection. Often wireless connections are fine, but if you have problems, the first troubleshooting step would be to switch to wired. We highly recommend streaming on wired connections.
4. Run OBS as admin. right-click on shortcut, properties, advanced, check box, ok, apply, ok.
5. Display capture is last resort. Build your scene with Game/Window/Video Device Capture etc.
6. OBS Settings, Advanced, Network, check box for Dynamically change bitrate...