Well i`ve already given some numbers for a Radeon RX Vega64 under Windows 10 a little bit earlier.
24 32MPIx with my Standard Preset + DeepPrime are finished in around 180seconds.
So It runs somewhere between 3-5 MPx/Sec depending on the files, batch length and corrections applied.
The CPU does still seem to play a role though, since i`ve seen numbers from a 32C Zen2 Threadripper with a GTX1660 crunching a single 50MPix files between 8-10seconds.