i think 118€ for 12MH @50W isnt the worst deal, as long as those 1070/80 or 580s are that expensive.

bought 6 of those sapphire RX 560D with micron memory
flashing them to normal RX560 with 1024 shaders was no problem!

currently running that rig with 12MH at ~50Watts each card.

1625straps to upper
950mV mem
tpd set to 52Watt
gpu 1200mhz
ram 2050mhz

edit: just recognized that this card pulls about 15 Watts more with 560D bios and 896 shaders, funny^^
win-win situation if you flash it to normal 560