Cooler master b series v2 500w power supply unit 80 efficiency with uk cable features higher than 85 efficiency under typical load operation active pfc amp pwm combo control silent 120mm fan with intelligent fan speed control green power design to meet energy star blue angel and erp 2010 requirements powerful 12v rail for strong resistance to any overloading multiple built in protection systems ocp ovp opp scp specifications interfacesports sata connectors 6 x sata cpu con