Main Specifications

Seasonic S12II Bronze 520 W power supply specs include:

  • Nominal labeled power: 520 W at 40° C or 416 W at 50° C (“the rated power will reduce from 100% to 80% from 40° C to 50° C”)
  • Measured maximum power: 588.2 W at 39.9° C.
  • Labeled efficiency: Up to 87%. 80 Plus Bronze certified
  • Measured efficiency: Between 82.4% and 86.5% at 115 V (nominal, see complete results for actual voltage).
  • Active PFC: Yes.
  • Modular Cabling System: No.
  • Motherboard Power Connectors: One 20/24-pin connector, one EPS12V connector and two ATX12V connectors that together form an EPS12V connector.
  • Video Card Power Connectors: One six-pin connector and one six/eight-pin connector in separated cables.
  • SATA Power Connectors: Six in two cables.
  • Peripheral Power Connectors: Six in two cables.
  • Floppy Disk Drive Power Connectors: None.
  • Protections: Over voltage (OVP), over power (OPP) and short-circuit (SCP). Under voltage (UVP) not listed but present.
  • Warranty: Five years
  • More Information:
  • Average price in the US*: USD 90.00

* Researched at on the day we published this review.

Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.