Part Number: INNOSILICON A4 Dominator. Hashrate: 280Mhs in total with 2 tubes (+-10% performance, can be over-clocked at user's risk) Size: Length 28cm * Width 26cm * Height 13cm Gross weight: 9.2KG (without PSU) ASIC: A4, 80pcs Blade: 4pcs Voltage: +12V Required rated PSU: 1050W or above, 4 * PCI-E 6Pin Cooling: air-cooled with 2 fans Internet connection: Ethernet Power supply connection: 2 PCIE port per power board. It is recommended to use an independent power supply to the whole power supply. In case of non-independent power supply, each board can be connected to a different power supply, but each board shall not be connected with multiple power supplies and ensure that the power board.