StarTech.com 400W ATX12V 2.2 Power Supply f/ HP & Compaq PC. Nominal power: 400 W, AC input frequency: 50/60 Hz. Fan diameter: 80 mm. Connector(s): 5 - LP4 F, 1 - SP4 F. Weight: 1300 g. Mean time between failures (MTBF): 100000 h