I'm not sure how to show a benchmark, but I just upgraded from an Intel Core i7-3770K with Nvidia Quadro K4000 to AMD Ryzen 7 1800x with AMD Radeon Pro WX 7100 8 GB Graphics.
On my Intel Core i7-3770K workstation, Sony A99II 42-megapixel images were taking upwards of 92 seconds using DxO PRIME.
On my new AMD Ryzen 7 1800x workstation, I can now process Sony A99II images at full 42-megapixel res in roughly 10-14 seconds using HQ noise reduction and 38-42 seconds using DxO PRIME. The times very based on the image, but all results are leaps and bounds above what I was working with before!
I expect the results to only improve as RYZEN is further optimized & I highly recommend it!