OK, I swapped my graphic card over yesterday.
The constants are an Intel 11700k, 32Gb RAM and all the source and target files on a Samsung 990 pro M.2 2Tb.
There were 10 RAW CR3 files (EOS R) and I am using PL 8.1 build 434 and the Nvidia Studio driver 566.14. I carried out no edits to the photos.
With the 1650 GTX, export times were (apx, I used as stopwatch):
All in seconds
No NR 25
HQ 30
Prime 172
Deep Prime 155
Deep Prime XD/XD2 399
With the RTX 4060
No NR 22
HQ 27
Prime 171
Deep Prime 27
Deep Prime XD/XD2 60
Therefore there is no appreciable difference for no NR, HQ and Prime, but significant improvements (more than I had anticipated) on Deep Prime and Deep Prime XD/XD2.
I think (but the thought is subjective) that the picture using the loupe tool renders more quickly too. with the new GPU.
I realise the above isn’t going to change the world in any way, but I post in the hope that it will help anyone thinking about upgrading their own graphic card have some data regarding the improvement they might achieve.
Best wishes
Malcolm