this is just a personal test did to myself with Redshift on 3Ds max 2018..
i was amazed by the speed of it.. it's rocket fast.. one problem the render stopped when the video reached 1GB that's why i think it stopped after 2500~ frames.. but the render time was almost 4 hours..
my GPU: GTX 1080 ti
CPU: r7 1700
no OC