Very high encoding lag with little utilization

[CarefulCalligrapher]

Getting big encoding lag and dropped frames in OBS recordings, despite the fact that my GPU is at 50-60% encoding utilization, and very low 3D utilization.

Log: https://obsproject.com/logs/Jl80FNCMqznDR8kR

 

[s2kchris305]

Your streaming in 4k?

 

[CarefulCalligrapher]

Your streaming in 4k?

I don't stream but I record in 4K.

 

[CarefulCalligrapher]

I am now seeing a different issue with further testing. Using Game Capture, my recordings stay choppy in the way that I've described, but now the logs report 0 dropped frames due to rendering/encoding lag. Switching to Display Capture seems to clear these up but is there a way to fix this?

Here is a log file: https://obsproject.com/logs/s8uGyxGfks6Nryrq
And a video file to match that shows the stutter even when zero dropped frames are detected: https://youtu.be/JkW91cQDvRI

 

[CarefulCalligrapher]

Okay another update on this, display capture has started exhibiting the same behavior. It seems random when it happens and when it doesn't. I have no idea what's going on here but if anyone has any idea, I'm willing to provide as much information and clips as needed.