Interesting. Where do you measure these watts? Software or at the wall? I've got 2 rigs mixed with rx480&rx580's and they are so power hungry. Yours seems to draw under 160w/card.
yes they are 150-160watts out of the box, but you haven't modded them? when i stated i was 1480 watts at wall , i then got to 1100 or so with small mods