2-Pack AntMiner S3 441Gh/s @ 0.77W/Gh 28nm SHA-256 ASIC Miner The S3+ Stably Runs at 453 GH/s at 225MHz Uses 355 Watts From the Wall .78J/GH Power Efficiency 12V DC Power Supply (Not Included) 331 mm X 137 mm X 160 mm Dimensions