The new 550-Watt Power Supply is the latest addition to our line-up of professional power supplies. It provides the ultimate amount of power and performance. This series is 25% more efficient than its predecessor with the affordability and quality you have come to expect from Ultra. The Ultra 550-Watt Power Supply sleek new design incorporates ascetics with functionality. This design comes with a 135mm cooling fan which reduces heat by 20% and noise by 15 dB. Over all this new Ultra 500-Watt Power Supply line of professional power supplies is the ultimate upgrade or addition to any system.