Just set up a rig with 5 EVGA 3GB 1060's.
Exact model here:
https://www.newegg.com/Product/Product.aspx?Item=N82E16814487263May be some of the cheapest 1060's currently BUT they do have SAMSUNG memory! I had them at +1000 mhz in afterburner but had some weird stuff going on, backed it off to 800 Mhz so I could call it a night.
Running about 22.5-23 Mhs with 800 mhz memory OC. Not bad at all for the cheapest cards around.
Only issue is the heatsink is SHIT, the SC (superclocked) edition of this card has a much denser heat sink and as a result doesn't get nearly as hot.
I said 89C on one card at one point so I cranked the fans to 100% and put the A/C down to 65 while blasting the cards with vortex fans. Down to 80C max, avg 72c between all cards.
Feel bad for those that got cards with shit VRAM, 18-19 is not good for these cards so do your research before you buy!
My Corsair RMi 1000 is reporting avg 660 watt draw from the wall when the cards are under full load. Not bad for 112.5 mhs.