GPU Encoder overload, it's been working absolutely fine before...

[Amberous]

Here's my log file - https://obsproject.com/logs/k9pq9Ryy3jt2f8l3
I upload to YouTube, and before today my videos have been excellent quality, 4K.
Here's one of my latest videos -
https://youtu.be/ZJPJFK0UpAw
Just to give you an example of the quality I'm used to. I really don't know what I've done differently, or rather what I've changed to result in awful lagging whilst I record. I would appreciate some help...

 

[Amberous]

And here's my previous log file, when I has no issues - https://obsproject.com/logs/4HtkZhripTpguVsY
It used to be an issue where my gameplay would lag and my cam link would be absolutely fine, though I did finally resolve that. But on this occasion both are lagging.