OCZ 550W Fatal1ty Power Supply UK. Nominal power: 550 W, AC input voltage: 100 - 240 V, AC input frequency: 50/60 Hz. Fan diameter: 135 mm. Connector(s): 4-pin CPU, 8-pin CPU, 6-pin PCI-E, 8-pin PCI-E. Mean time between failures (MTBF): 100000 h