Please what is the power consumption?
Depends on how fast you want to run them:
You can have it as low as 420 watts each @ 800 GH/s OR 1000 watts each @ 1300Gh/s (1.3T)
Chip Freq Voltage Hashrate/Ghs Power Usage/W
375:300:275 7000 800 419
375:350:300 7500 866 457
420:390:360 7625 980 542
450:390:370 8000 1000 600
500:450:430 8125 1140 710
550:500:450 8250 1250 800
570:510:470 8375 1300 990
-Dave