Yes, of course the 580W consumption is just taken off the software. Off the wall I haven't measured this rig yet.
But the same software reading for my 6 x 1070 rig is much lower mh/s and over 700W power.
7xrx580 will be 800-900watts on the wall depending on your psu effiecency. and 6x1070 will be more or less like this.