Could you give some instructions/link how to get such figures? I'm getting 3.6 I/s on my msi rx470 8gb using around 120W per card.
mod bios, just like when we mod for cryptonight .. set clock / mem clock 1050/2000. or if you want a slightly higher result set 1200/2000. I use vga sapphire rx 470 8gb with samsung chip if your chip is samsung please copy 777000000000000022CC1C00AD615C41C0590E152ECC8608006007000B031420FA8900A00300000010122F3FBA354019 to strap 1750 and 2000 only requires power consumption of about 70 - 90W / card