Cooler Master offers a brand new lineup of power supplies for end users – the Silent Pro Gold Series, which meet the 80Plus Gold Standard with over 90% power efficiency. Using technologies such as Heat Transfer Technology (HTT), Hyper Path, and Hybrid Transformers, the Silent Pro Gold sets a new standard in PSU excellence. Compliance with the latest Intel standard ATX 12V V2.3, the Silent Pro Gold is also SLI and CrossFire certified. Flat modularized cables provide easy cable management while leading to better airflow. Fans: 135mm Ultra Silent Fan Main Connector: 20+4Pin PCI-Express Connector: 4 x 6-Pin, 4 x 6+2-Pin SATA Power Connector: 9 Power Good Signal: 100-500ms Hold-up Time: 17ms min. Efficiency: 90% typical Over Voltage Protection: Yes