StarTech.com WattSmart 650 W power supply specs include:

• ATX12V 2.2
• Nominal labeled power: 650 W.
• Measured maximum power: 666 W at 50.7º C (or 793 W at 50º C with +12 V noise level outside specs).
• Labeled efficiency: 80% minimum
• Measured efficiency: Between 82.2% and 86.2% at 115 V.
• Active PFC: Yes.
• Motherboard Connectors: One 20/24-pin connector, one ATX12V connector and one EPS12V connector.
• Peripheral Connectors: two auxiliary power cables for video cards with 6-pin connectors, two cables containing three standard peripheral power connectors and one floppy disk drive power connector each and two cables containing three SATA power connectors each.
• Protections: Information not available. During our tests we could test that this power supply has over load (OLP) and short-circuit (SCP) protections working. Over current protection (OCP) test failed.
• Warranty: 3 years.
• Real manufacturer: ATNG
• More Information: http://www.startech.com
• Average price in the US*: USD 135.00.

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