Philipma...am I right in reading that your efficiency is 0.39???
no that is another miner running at lower clocks in a colder area.
for the most part my sp20's do 460 to 490 watts and 1025 to 1075 gh.
So I am just under .48 at the kwatt meter.
this one is using 460 watts or 460/1015 = .448 watts a gh at the kwatt meter
this one is in a spare bedroom the others are all in my attached garage since I have 7 in their it is warmer and they do a little worse around .48
