I got same problem, I notice that "Power Limit(Watt):" always is "6", I can't change it, When I press "save", there are error message "Error Power limit". No matter what I do I can't change it, only running in "out of box" speed(can't overclock), but my other rig, RX470 have no problem. Is it manufacturer lock it(to avoid overclock)?

I am running SMOS with my rig. My motherboard is Biostar TB250-BTCPro(updated bios), running six 1060 3GB

Got error message "error power limit"   when press "save" button, can't overclock, anyone can help?