Antec SmartPower 2.0 SP-450 450-Watt Power Supply Unit Super quiet thanks to Unique Dual Fan Technology, exhaust fan spins on reaching certain temperatures while second fan spins on power up 450-watt ATX12V v2.0 compliant, with dual+12V rails Consumes up to 25% less power than standard power supplies 4 SATA Connectors support Serial ATA drives Flow-through dual 80mm fans (one intake and one exhaust)