Seasonic X-Series 650 W power supply main specs include:

• Nominal labeled power: 650 W.
• Measured maximum power: 793.7 W at 45.8º C.
• Labeled efficiency: 80 Plus Gold certified (87% minimum at 20% and 100% loads; 90% minimum at 50% load).
• Measured efficiency: Between 87.7% and 90.7% at 115 V.
• Active PFC: Yes.
• Modular Cabling System: Yes.
• Motherboard Power Connectors: One 20/24-pin connector, two EPS12V connectors and one ATX12V connector.
• Video Card Power Connectors: Four six/eight-pin connectors in four cables.
• SATA Power Connectors: Eight in three cables.
• Peripheral Power Connectors: Eight in three cables.
• Floppy Disk Drive Power Connectors: Two if the included adaptor that is connected to a peripheral power plug is used.
• Protections: Over voltage (OVP, not tested), under voltage (UVP, not tested), over power (OPP, not tested) and short-circuit (SCP, tested and working) protections.
• Warranty: Five years.
• More Information: http://www.seasonicusa.com
• Average price in the US*: USD 180.00.

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