No output session in log.
Open OBS. Start recording or streaming. Wait until your issue manifests. Stop the output session. From the Help menu, upload the Current log without quitting OBS.
Your machine may be powerful and expensive but it's not really appropriate for use with OBS. I hope you didn't buy that for this purpose, because it's not really ideal.
Being a Quadro card, your GPU should be able to run a lot of encoding sessions, but a single instance of OBS can basically only run two (simultaneous stream and record). The card is six years old now, it's only got 2GB of VRAM when current gaming cards have as much as 8GB, and its hardware encoder is out of date. You would have been better off with a $350 or less gaming GPU with a Turing encoder, like a 1650 Super or 1660Ti. And if you had that, it's arguable that you could get away with a much, much cheaper CPU without sacrificing much in the way of quality.
The workstation Xeon processor lacks an integrated GPU, so there's no QuickSync support. You should be able to use plenty of CPU power on doing an encode here, but frankly this CPU is overkill for that.
With no output session in the log I can't see what your performance or quality issue is, although you do have an above average number of media sources, none of which are set for hardware decoding, so they're all running on your CPU.