Antminer S9i 14TH/s Asic miner with Official power supply 1. Power consumption figures will vary with your PSU's efficiency, the ambient operating temperature and the accuracy of the power meter. 2. Hash Rate: 14TH/s±5% 3. Most Power Efficient Miner in Existence: 93.12 J/TH 4. There are 3 PCI-e connectors for +12V DC input on each hashing board 5. All 3 need to be connected to the PSU for the hash board to operate. Do not connect more than one PSU to the same hashing board! 6. Please note that the machine is refurbished one. it's really like new one , good working condition