Hi, I was trying to run my old rx580 on the same win machine I am running 3x RX 5700 and it was mining with 8MH/s and it was not stable. Any ideas? thanks!
I Have the same issue 4x RX580's and 2x GTX1070s.
All perfectly stable for months then all of a sudden approx. 4pm UK time yesterday, nothing will work.

Also went back and took a look if claymore worked...it did not.
Is this anything to do with the minor pools trying to go against the bigger ones?
I'm hoping someone with more experience can help on this forum.
Which OS do you use? I had problems in Win 7. 6 * gtx-1070. After switch to Win 10 all works.