i just buy 10x zotac gtx1060 6gb amp,all is the hynix memory... 
only can get 15mh/s per card
only can get 15mh/s per card
They must be broken. Just built 3 Rigs with 8 Zotac cards on each. Each card runs between 23-24mh / 280-290 sols.
Send them back and ask for a refund or new cards.