15.65 x 220v = 3443 /2 = 1721watts for each Neptune "At the wall"
pretty close for horseshoes and hand-gernades
3.4+ th/s each, so 3400/1721 is 1.9+Gh/s per watt or .506 watt/Gh/s ... "right out of the box"
Now who's "stoned"? That's figuring at 3.4, and it's actually a bit better, as you see here.
Your 2000 watt .57watt/gh/s sounds like you may have power delivery problems to me, I can't be that "lucky"
Nice.. One comment on the VRM temps.. 85C is the max temp rating from Ericsson and given that they also get driven 10A above spec from the factory I'd recommend trying to get those temps a bit lower. Not that you plan to run them forever, but 20C over temp and 10A over current might burn them up in a few months. Some look like they are getting close to the destructive limit (125c I think).
General update for those following RMA activity: After weeks of waiting I finally received the two cubes today that I had to RMA. I hope to get them setup tomorrow.. And I hope they work. I was told my "RMA has been fixed," but I put a small X on each of them and the boxes I got back are unmarked. Most likely they are not the cubes I sent them.
Quick timeline, minus several follow ups via email and phone:
7/2 - issue reported with 2 cubes and controller card
7/8 - RMA authorized, shipping label issued
7/8 - RMA dispatched
7/21 - replacement controller card received
7/28 - 2 cubes received