Hello
I will like to comment, that , even when --pec is a good tool to give an idea of the efficiency, it is not exact at all.

for instance, a 1080 at minimum target power limit uses 100W, but eats 124 watts at the wall (with a gold rated PSU at 40% load)
so if you want real numbers, use a AC wattmeter, like the Kill-a-watt gadget, or better, because that is the real power you are paying for.

cheers
indkt.