Antminer S7 is a 4.86 TH device and with current difficulty and average luck it mines
but
Antminer S9 will produce 14 TH/s of mining power per unit, using 16nm ASIC chips. In fact, there are 189 chips packed into every miner. The power consumption sits around 1.38 kW, although there is a 7% variation to take into account. However, this makes the miner very power efficient, as just 0.1 Joule per GigaHash.
