I have been trying to track down what was causing my OBS to randomly get an encoder overload error when streaming/recording and after re-installing OBS, recreating my scenes and profile it looks like when I have anything added to the Vertical canvas I get this error. I previously was using a 3060TI but upgraded to a 4070TI Super and still have the same issue. Its pretty random but usually happens after about an hour, happens while just streaming and vertical recording as well as streaming, main canvas recording and vertical recording. Happens with OBS in regular and admin mode.
Here are a couple old logs from pre-GPU upgrade as well as a youtube video time stamped to when the issue happens