Lepa B-Series B550-SA 550 Watt ATX12V SLI Ready CrossFire Ready 80 Plus Bronze Certified Active PFC Power Supply 80 Plus Bronze certified with peak 88% efficiency. 8P PCI-E connector supplied supporting extreme graphic cards 12cm fan with thermal programmed control guarantees cool performance and silent operation. Active PFC universal switching circuit improves Power Factor value up to 0.99 Single +12V connector rail with 38A output to support high power graphics card Extended CPU connector cable to 60cm facilitates installation with bottom-mounted-PSU chassis SATA power connector with 3.3V rail to support new generation SSD Protected by Over Power, Over Voltage, Over Current, Short-Circuit, and Brown Out protections circuits.