I currently have the following setup:
Asrock H81 Pro BTC R2.0
6 x EVGA GTX 1060 3GB SC
2 x Corsair CX 750M
8 Gb RAM
Intel Celeron CPU\
Out of 6x GTX 1060 2x of the cards get this exact error
"Windows has stopped this device because it has reported problems. (Code 43)
What to do in this situation is make sure they are receiving all the power they need. Then use DDU to uninstall the drivers then reinstall drivers.
If those 2 do not work then you have a dead card.