Ok, unadvertently I can post something that might be of value...
I'm a noobie to mining so bare with me.
I am back to doing 30.5 MH/s ETH - Dual Claymore - Dagger Hashimoto
All I needed to do was set up "-strap 1" in configuration... so I went up from 27.1 to 30.5 MH/s
One note: I couldn't hold 2185MHz in these memories with that option set, but I'm apparently stable @ 2100MHz...
Needs further testing, I might get away with 2150MHz or so, which would easily give me 31.low MH/s, which is what I expected from this card (RX 590)
I can't imagine what it could do with a proper BIOS mod, unless what I'm doing is already maxing it out other way.