Grats to the firsts come to serve with this AntMiner A3 ,  the fasters firts, will get early to the ROI ,  but 400$ /day will become 20$ /day at August...  its said  that BITMAIN its selling around 2000 - 2500 AntMiner A3....  2000 x 815GH = 1630 TH to  2037,5 TH will be added only with BITMAIN