Using the intel HD630 to encode for OBS while my rtx 2080 is strictly for games.
:D LOL. How about just use the dedicated encoder in the 2080?
The nvenc encoder is separate silicon on the die dedicated for encoding only, and should have minimal impact on overall performance if set up correctly. (it also happens to be one of the best quality encoders available right now)
Switch to the nvenc encoder and post a log of a recording session with it, and we can help address any issues you are experiencing.