Hi,
I have a rig with 6 x rx580s that started mining at 24Mh out of the box. I experimented with the bios a little bit, got it down to 12, now it's back at 24 and I am a little depressed as I can't get more than that and I tried for the last two days. I will appreciate all help, thanks.
in my opinion it's better you try studying OC/mod vga rx 580, many refrensinya in google, and that's what I did on my rx 570, I have 2 x rx 570 with early speed 22MH/s after I mod and OC speed now each be 27-29 MH/ s