I have 14 of those cards , with 2x7 setup .
I received them with 3 different version number ( 0 , 1 , 2 ) and 3 different bioses.
Modded all bioses , card hashnig between 29.8-30.1 MH/s stable
with modded bioses , each card consume around 120-130 watts on 240 volts , 7 cards setup with mobo/cpu/sdd/8gb mem , the whole system is pulling around 900 - 970 watts on 240 volts.
Without modded bios the cards was hashnig stable with 24MH/s and consumed around 150-160 watts , the whole system is pulled around 1100 watts..Im using evga 1600 watts T2 psu ...