Ethereum Rig Power Consumption, RX 580 2 card rigs.
Channel: Jason Dragon
Date: 2017-06-09

This is a short video showing two different rigs and how much power that they use.   
Some basic Math..... 380W Usage for total 2 card system
70W when not mining.....thus the cards use 310W of power, or 155W each.   
Assuming that of that 70W that 20W is the power supply it means that the motherboard/hd/cpu/ram use 50W of power.  So a 6 card rig should use about 100W less than three of these systems put together.....  

A 6 Card rig should use 60W for PSU overhead, 50W for board and such, and 155W per card, and then add about 10W for each Riser Board...that gets you a total of 1100W of power.     Three of my dual card systems would be 1150W.....so only 50W more to get all the added benefits.  

I have been told that rigs made from RX 480 were about 850W to 900W.   From my testing the 480 was about 40W less usage per card than the 580 so that makes perfect sense.  Too bad those cards are not being made.

We did not undervolt in this video, doing so can usually save a few Watts of power.