Stock Hashrate: 190 MH/s would mean about 31.7 mh/s per card. Are you sure about that claim? That's higher than the legends on these forums can push those cards to.
And on EthOS? Those cards draw 180W each, so 6 cards would burn that 1000W PSU unless you undervolt, so how are you undervolting on ethOS?
Also what brand/buiild are the Rx 580 8GB cards? What brand/make are the GTX 1080ti's? Can you post some pictures here of the rigs that you build and/or cards?
Im super interested in buying just the cards, in bulk. Answer the above queries and we can do business.
I respect your views. But in my mining rigs it is possible and working fine.
I myself have farm (or a little farm) of 10k MH/s at Jaipur. you are invited to visit.
Thanks