Xilence SPS-XP500.XQ. Nominal power: 500 W, Power protection features: over voltage, short circuit. Fan diameter: 135 mm. Connector(s): 4-pin 12V(MB) x 2, BIG 4-pin(HDD) x 4, 6+2-pin PCI-E x 1, TC Power Fan x 1. Safety: RoHS, CB, CE, TÜV, FCC