SilverStone Element ST50EF-Plus power supply specs include:

• ATX12V 2.2
• Nominal labeled power: 500 W.
• Measured maximum power: 500 W at 50º C.
• Labeled efficiency: 80% minimum (80 Plus certified)
• Measured efficiency: Between 77.6% and 83.7% at 115 V (nominal, see complete results for actual voltage).
• Active PFC: Yes.
• Modular Cabling System: No.
• Motherboard Power Connectors: One 24-pin connector and one EPS12V connector.
• Video Card Power Connectors: Two six-pin connectors in two cables.
• SATA Power Connectors: Six in two cables.
• Peripheral Power Connectors: Six in two cables.
• Floppy Disk Drive Power Connectors: Two in two cables.
• Protections: Over current (OCP, tested and working), over voltage (OVP, not tested), no load (NLO) and short-circuit (SCP, tested and working). Over temperature protection (OTP) is present but not listed by the manufacturer.
• Warranty: Information not available.
• Real Manufacturer: Enhance
• More Information: http://www.silverstonetek.com
• Average price in the US*: USD 90.00.

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