The 1500W power supply ST1500 from SilverStone provides the power you need for your most intense applications. It can continuously deliver the full 1500W at 80-87% efficiency over unprecedented eight +12V rails for balanced power distribution. The auto-switching input can handle all common voltages so all you have to do is plug it in. The power connectors are fully modular, letting you use only the connections you need. Any extra cables go into a handy carry bag, so they’re still available when you upgrade. The cables are all sheathed to de-clutter the inside of the case, enhancing airflow. There is a 135mm fan on the bottom of the PSU to move extreme amounts of air to keep everything cool. The back panel is a honeycomb mesh broken only by a switch, the power plug and an indicator LED for virtually unrestricted airflow. Go ahead; build the system of your dreams, the ST1500 can handle it. Fans: 135mm Silent fan Main Connector: 20+4Pin +12V Rails: 8 PCI-Express Connector: 4 x 8pin, 4 x 6pin SATA Power Connector: 12 Efficiency: 85%~88% at 20%~100% loading Over Voltage Protection: Yes Input Voltage: 90 - 264 V