Cooler Master GM Series G550M - Compact 550W 80 PLUS Bronze Modular PSU (6th Generation Skylake Compatible) Main Connector: 20+4Pin +12V Rails: Single PCI-Express Connector: 2 x 6+2-Pin SATA Power Connector: 6 Power Good Signal: 100-500ms Hold-up Time: 16ms min. Efficiency: 85% Typically Over Voltage Protection: Yes