In case nobody else noticed, their site has conflicting information for the power efficiency.
The miner specs say it is 0.69W/GHS, but their "Never-Ending Progress" picture shows it @ ~0.48W/GHS.
I assume the 0.69W/GHS is the correct value...
And what's with the misleading efficiency chart? The text clearly states that it is .69w/GHs but the chart show .4w/GHs.
The never ending progress picture is misleading because it shows S4 power efficiency coming in at under .5W/GH, but your official specs say the power efficiency is .69W/GH.
BITMAIN why did the graph showing efficiency change and whats with the green dotted line now?
It was changed based on feedback. The green dotted line represents the unit running @ 1TH.