Corsair CMPSU-400CX 400-Watt CX Series 80 Plus Certified Power Supply compatible with Core i7 and Core i5 Extra long cables support full tower chassis 80 Plus Certified High efficiency topology to ensure energy savings Dedicated single +12V rail offers maximum compatibility with latest components Over Current/Voltage/Power Protection, Under Voltage Protection, and Short Circuit Protection provides maximum safety to critical system Components 99% Active Power Factor Correction provides clean and reliable power to your system