i have 6 sapphire rx580s 8gb pulses and can get to 191mh/s. 31mh/s each but over 1100 watts at the wall to 1400.

i have now played with them for a week and get 181.324 avg 30.225 on each BUT only 95 watts a card or so
my rig is now 970 at wall, i have been told i should be at 880 at wall, so a few more plays to do