up need to share this experience.  

I've go simplemining with 4 rx580 and have 853W on wall.with OC (1140/2150) and dual mining ETH+DCR

the only solution is to mod volt directly on vbios ?

this is my ROM
https://www.daupheus.com/wp-content/uploads/2017/05/rx580firstmoddedspecial.rom.xz