Compare to APW3++ 93.5% conversion effeciency , APW7 PSU is 95% conversion efficiency, which mean APW7 save more electricity fee,Efficiency, very quiet, stable performance. The APW7 can work stably in environments with a 50 ambient temperature. If temperatures exceed 50, the PSU should be underclocked. Considering the high temperature in mining operations, all internal components are selected with a standard of 105, so the APW7 has a much longer lifespan than a universal use PSU under similar high temperatures. Perfect function for protecting Miners, when circut is malfunction or power supply has higher inside temperature, it will shut off automatically to protect.including Over Voltage Protection, Under Voltage Protection, Over Current Protection, Over Power Protection, and Short Circuit Protection. One APW7 can power up one S9i, one L3++, one D3, one V9, one X3, one E3 or one Z9 mini. This APW7 has 5 pairs of 6 pin PCI-E connectors (i.e. 10 connectors) ,Support back wiring, easy for user to install machine, effective wear resistance. As with other mining equipment, the cooling fan and power cord interface are located at the front of the power supply, allowing for easy heat dissipation throughout the mine. APW7 can guarantee the stability of the cryptocurrency mining rig operation and can match the common load demand within 12V 1800W, making it Perfect for situations requiring high power such as bitcoin mining. Features: DC Voltage: 12.0V Rated Current (Input 220V): 150A Rated Power (input 220V): 1800W Rated Current (Input 110V): 83.3A Rated Power (input 110V): 1000W Start-Up Time: Less than 2 seconds Power of retention time: more than 10ms Voltage Range:100-264V AC Frequency Range: 47-63 hz Power factor: greater than 0.99 (full load) Leakage Current: Less than 1.5mA Note: Please confirm this item is the right model you need before placing order. colour: silver