With Windows 10 v1709 (Fall Creators Update), make sure you running the latest Crimson Relive 17.1x.x drivers with the 'compute' toggle on for each of the cards in AMD settings
I'm running on Win 10 v1709 and Crimson Relive 17.30.x. There is no GPU workload with "compute" toggle. My RX580 8GB are getting 25 MH/s on stock, should I downgrade Relive to 17.10 and I'll be able to see "GPU Workload" toggle there?
Edited:
I think it's fine to run on 17.30.x, because there is a note for the driver:
This driver is not intended for graphics or gaming workloads.