SILVERSTONE SFX Series SST-SX550 500W SFX 80 PLUS GOLD Certified Active PFC Power Supplies Fans: Single 80mm silent fan Main Connector: 20+4Pin +12V Rails: Single PCI-Express Connector: 2 x 6+2-Pin SATA Power Connector: 3 Efficiency: 87% ~ 90% at 10% ~ 100% loading Input Voltage: 90 - 264 V Input Frequency Range: 47 - 63 Hz
