at me 6 x rx580 sapphire nitro+ .. 840-860w at socket meter when mining eth 186,8xx mh/s  .. and cryptonight v7 .. 640w cca 5400 h/s
all 6x cards 1150/2xxx (2040-2250 mhz) .. i have hynix, micron, elpida memory 850/900mV
moded bios also with one click polaris