I tried all the BIOS from anorak website, they only gave 22MH/s per card. I tried also 777000000000000022CC1C00CE615C45C0571016B30CD50900400700140514207A8900A00300000 010103139962C3617, but miner crashed right the way.
I recently bought few MSI RX 580 Armor 4G OC hynix, after a few hours, I only got 23MH/s on ethash, which is really bad. I tried everything I knew besides changing the motherboard. The best result I got, is 23MH/s with PolarisBiosEditor1.6.4 one click patch. Does anybody have any ideas? Thanks