COUGAR POWER XTC 550, 550W, 80 Plus Efficiency, Connectors: 1x 24-pin MB, 1x 8-pin CPU, 2x P-ATA, 5x S-ATA, 2x PCI-E 8(6+2)-pin, Under & Over Voltage Protection, SCP, OPP, OCP, Superior Fan Curve Tuning, Active PFC, 105°C Japanese Standby Capacitors