What kind of PSU is in that thing and where do you ship from?
cougar GX 1050, I'll correct the op in a second. I ship from 74055 Oklahoma.
How did you undervolt it?
In the Minera options, I probably should have said underclock instead, the minera image lets you pick the rate, it is at 330 standard and I think i took it down to 320.
undervolt is also possible, but it needs replacing a few resistors on each board.
I'm not sure anyone published which one, but the schematics are available, so it's really easy to figure.
I may even have a PM in my outbox where I explained which resistors should be the good ones.
That's basically what was done with the "X6" units, undervolt, and more chips.