Man those numbers are high.
I am doing 10mh at 167 watts on 2 gridseed blades and 1 gridseed 5 chip . and one of the gridseed blades is defective . I should be doing 11.0mh
but I have a 1200 watt plat seasonic which is more efficient then your psu. still you are 3.4x the power for 1.5 x the hash
Something is wrong with the firmware these miner should be at much lower numbers.
I am doing 16.7 watts an mh with the gridseeds
Which raises the $64M question: Do our GAW miners use the same chip as the Zeus? Odd they were both released within days of each other, at similar price points, zenminer supports both, but the GAWs power usage seems to be twice what the Zeus advertises (I haven't seen if they are actually delivering on that advertisement).
Some have been guessing the same chip, but different board designs? If so, there might be hope for a firmware patch to greatly cut the power down.