Rosewill Valens Series 600W Power Supply, 80 PLUS Gold Certified, Single +12V Rail, Intel 4th Gen CPU Ready, SLI & Crossfire Ready - Valens-600 Fans: 1 x Silent 120mm Fan Main Connector: 20+4Pin +12V Rails: Single PCI-Express Connector: 2 x 6+2-Pin Power Good Signal: 100-500ms Hold-up Time: > 16ms Efficiency: > 90%, Up to 92% Over Voltage Protection: +3.3V, +5V, +12V