Antec SP-500 SmartPower ATX Computer Power Supply, 500 Watt

The SmartPower 2.0 power supply is ATX12V 2.0 compliant, featuring dual 12-volt outputs for added system stability, 4 Serial ATA connectors for SATA optical drives, a PCI-E graphics card power connector, and industrial-grade protection from short circuits, under voltage, over voltage and power overloads. Dual 80mm fans (one for intake, 1 for exhaust) offer virtually silent operation. The 24-pin power connector has a detachable 4-pin section for backwards compatibility with ATX 20-pin motherboards. SmartPower 2.0 lets your system consume up to 25% less power than standard power supplies, saving energy as well as operating costs. Backed by the manufacturer's 3-year limited warranty