Basics:
¡SLI/Crossfire Capture Mode (aka 'Shared memory capture') is very slow, and only to be used on SLI & Crossfire systems.
If you're using a laptop or a display with multiple graphics cards and your game is only running on one of them, consider switching OBS to run on the same GPU instead of enabling this setting. Guide available
here!
1. Update your Windows 10 to 2004 (if available) or 1909 per
https://obsproject.com/blog/five-simple-tips-for-new-streamers.
2. Your log contains streaming sessions with dropped frames. This can only be caused by a failure in your internet connection or your networking hardware. It is not caused by OBS. Follow the troubleshooting steps at:
Dropped Frames and General Connection Issues. After updating Windows 10, use the Device Manager to check for driver updates to your network card.
In OBS go to
Settings > Advanced > Network and check the box next to the option that says "Dynamically change bitrate to manage congestion", [Apply] [OK].