Hey @CAT-THE-FIFTH, finally managed to get my 3900X up and running. For my most intensive task which is a DXO Photolab export to Lightroom with a few adjustments but Prime NR set to 90, the 3900X took 20secs. My 8600K@5Ghz took 25secs.
This was a 20Megapixel RAW file from a Sony RX10 IV. That's ~20% improvement which seems to tie in with the chart from Puget.
Once I got things configured more I'll try to optimise the 3900X and see if there is any improvement though there isn't much headroom for overclocking in these CPU's.
Thank you for testing this out - considering the Ryzen 9 3900X is running at a much lower clockspeed,that is good to hear! I don't overclock as I have a SFF PC myself,so it looks like one of the new CPUs would be a solid upgrade over my current Ryzen 5 2600!