I've got Sapphire Nitro+ RX580 8GB [Hynix memory] and it hashes on 21.9 mh/s out of the box without any overclocking or bios modding, as far as I know it should be around 24 mh/s, any ideas why?
Check the BIOS switch on the card and make sure it's closest to your HDMI ports. This bumped my stock from 16 to 24mhs. I have a ROM for sale if you want 31mhs ETH and 600mhs SIA using claymore
Answers