SeaSonic S12II-380 Review & Specs

SeaSonic S12II-380 380W 80 PLUS Bronze SS-380GB

SeaSonic S12II-380 380W 80 PLUS Bronze SS-380GB

- SeaSonic

★ ★ ★ ★ ★
(10 reviews)

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  • The S12II Bronze Series achieves the 80 PLUS® Bronze standard of at least 82%, 85% & 82% power usage efficiency at 20%, 50% & 100% operating loads respectively. This, combined with Active Power Factor Correction, enables the S12II Bronze to reduce energy waste, boost power efficiency and more importantly, reduce the energy costs for the users.
  • In addition to the efficiency upgrade, the S12II Bronze Series maintains the strong foundations of the S12II series. Important features such as the stable and proven Double Forward Converter circuit design, the industry leading Smart and Silent Fan Control (S2FC) and the use of high reliability Japanese brand capacitors are all carried forward to the “Bronze”.
  • The S12II Bronze Series, similar to its predecessors, is available in the standard ATX Form Factor and in wattages that are most common for a PC system. In addition to the all-in-one cabling design, the 520W and 620W models come with additional EPS connectors for IPC and server systems and supports both 6P & 8P PCI-E connectors for the most current and high end dual graphic cards.

Specifications Overview

Model SS-380GB
Release Date July 2011

* First availability for purchase, it may not correspond to the actual market launch date.

Wattage 380W
Type ATX12V
Modular No
Efficiency 80+ Bronze
Output +3.3V@20A, +5V@20A, +12V1@17A, +12V2@17A, -12V@0.8A, +5VSB@2.5A
PCI-Express 6+2 Pin Connectors 1
EPS Connectors 1
SATA Connectors 4
Molex Connectors 6


  • Excellent build quality
  • 80PLUS Bronze
  • Very quiet
  • Stable voltages


  • Not modular


  • Mfr Part Number: S12II 380 BRONZE
  • Features:
    • Supports latest Intel & AMD processors
    • Support Vista System
    • Support SATA interface
    • Over Power Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • 80 PLUS Certified
  • Total Power: 380 W
  • Input Voltage: 100 ~ 240 V
  • Input Frequency Range: 47 ~ 63 Hz
  • Output: +3.3V @ 20A; +5V @ 20A; +12V1 @ 17A; +12V2 @ 17A; -12V @ 0.8A; +5VSB @ 2.5A
  • Connectors: 1x 20+4pin Main Power; 1x 4pin ATX 12V; 2x 4pin 3.5" FDD; 1x 6pin PCI-Express; 4x SATA; 6x 4pin Peripheral
  • Cooling System: 120mm Ball Bearing Cooling Fan
  • MTBF: 100,000 Hours at 25C Under Full Load
  • Dimension (WxLxH): 150 x 140 x 86 mm
  • RoHS compliant

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