Specification: Voltage : 110-240V INPUT AC110V= OUTPUT 1500W INPUT AC220V= OUTPUT 2000W Output Interface: 1. Mainboard: 24Pin 2. CPU: 4+4Pin 3. GPU: 6+2Pin * 16 4. IDE:5 5. SATA: 6 Port 6. 1.2m US line Matters need attention: 1.Video cards output mainly on 12V. This power supply output MAX 1600W at 12V for video cards. It may damage the power supply: If video cards watts exceed 1600W on 12V or over loaded running. 2.Please don?t running the power supply over-load working at high temperature environment. It may damage the power with poor heat sink. 3.When apply the power supply at FIRST time, first connect 3-5 pcs video cards, AFTER ONE WEEK, increase more video cards. It would be better foe power supply life time. Preparation for start-up: 1.Check the voltage first. Make sure your local voltage input in power supply AC input voltage range. 2.Plug in relevant wires and power cords. 3.Set I/O switch position, O for closed, I for power on. Quick test power supply: 1.Plug in a working power cord. 2.Find a metallic conductor(iron wire) to short green wire and black wire of the connector.(see picture below). If the power supply fan working, it shows the power supply working well.