Rendering Lag is GPU overload, plus your CPU is overloaded. Load reduction is in order. Have you tried your QuickSync encoder yet? It should work, if you install the latest driver. Take some load off the CPU......
09:40:52.532: Output 'simple_file_output': Total frames output: 6279
09:40:52.532: Output 'simple_file_output': Total drawn frames: 7520 (7911 attempted)
09:40:52.534: Output 'simple_file_output': Number of lagged frames due to rendering lag/stalls: 391 (4.9%)
09:40:52.534: [mp4 output: 'simple_file_output'] Waiting for file writer to finish...
09:40:52.548: [mp4 output: 'simple_file_output'] File output complete. Finalization took 44 ms.
09:40:52.637: ==== Recording Stop ================================================
09:40:52.645: Video stopped, number of skipped frames due to encoding lag: 2475/6309 (39.2%)
09:41:07.229: ==== Shutting down ==================================================
09:41:07.417: WASAPI: Device 'Speaker/Headphone (Realtek High Definition Audio)' Terminated
09:41:07.477: WASAPI: Device 'Microphone (Razer Seiren Mini)' Terminated
09:41:07.536: All scene data cleared
OBS Knowledge Base. Learn best practices to solve encoding performance issues
obsproject.com