Antec NeoPower 550 power supply main specs include:

• ATX12V 2.2
• Nominal labeled power: 550 W at 50º C.
• Measured maximum power: 650 W at 50º C.
• Nominal labeled efficiency: up to 85%.
• Measured efficiency: Between 83% and 88% at 115 V.
• Active PFC: Yes.
• Motherboard Connectors: 20/24-pin connector, ATX12V connector and EPS12V connector.
• Peripheral Connectors: Modular system allowing up to five cable groups to be connected. This power supply comes with the following cables: two auxiliary PCI Express cables, two peripheral cables with three peripheral power connectors each, two Serial ATA power cables with two Serial ATA power connectors each, and a floppy disk drive adaptor, which converts a peripheral power connector into two floppy disk drive power connectors.
• Protections: short-circuit (SCP), under voltage (UVP), overload power (OPP), over current (OCP) and over voltage (OVP).
• Warranty: 5 years.
• More Information: http://www.antec.com
• Average price in the US*: USD 114.50.

* Researched at Shopping.com on the day we published this review.