Thermaltake TR2 TR-500 500W ATX12V v2.3 SLI Ready CrossFire Ready Power Supply Fans: 1 Main Connector: 20+4Pin +12V Rails: 2 PCI-Express Connector: 1 x 6-Pin, 1 x 6+2-Pin SATA Power Connector: 6 Power Good Signal: 100-500ms Hold-up Time: 16ms min. Efficiency: > 72%