Wired ethernet is the highest-ROI single fix in your entire stream-quality stack. A single 30-dollar ethernet cable, plugged into your router and into your streaming PC, eliminates the largest single source of frame drops, packet loss, and bitrate instability that streamers face.

The reason is structural. Wi-Fi shares bandwidth with every other device in your home, suffers signal interference from walls, neighbors, microwaves, and Bluetooth, and re-transmits packets when interference spikes. Ethernet has none of those problems. The cable carries your stream's data on a dedicated path with consistent latency.

The implementation: buy a Cat6 ethernet cable long enough to reach from your router to your streaming PC. Plug one end into the router's LAN port. Plug the other end into your PC's ethernet port. Disable Wi-Fi on the PC entirely so it cannot fall back. Done.

The bandwidth lift, the latency stabilization, and the frame-drop elimination together produce more stream-quality improvement than every other fix in this module combined. Run the cable.