AntMiner S4 SPEC:

* Chip Operating Voltage: 0.72V

* Chip Quantity per unit: 160

* Hash Rate: 2,000GH/s guaranteed

* Power Efficiency: 0.69Watt/GH/s at the wall

* Over clocking: About 10%, but not guaranteed

* 3U Rack 432mm*442mm*133mm

* PSU inside: 1400W, 80PLUS gold, C14 input socket. Power line not included. You may look for one line with no less than 16A in your local market

chinacoal05

* Temperature: 40-50 degree Celsius tested in the mining farm

* Fan Speed: 3900RPM

* Stable but a little bit noisy

* Ethernet connection, Stand alone

Shandong China Coal Industrial&Mining Supplies Group Co.,Ltd (hereinafter referred to as china coal) is a group company, which is a collection of e-commerce, machinery manufacturing, software, research and development, modern logistics of large diversified industrial group. The group has 100 million yuan registered capital , with more than 1100 employees.

China coal is a professional manufacturing base of mines support equipment, transport equipment, lifting equipment, spray equipment, drilling equipment, ventilation equipment, lifting equipment and other products, as well as research and development new product and mine construction products with advanced high technology.