Seasonic

Seasonic G12 GC-850 850W 80 PLUS Gold ATX PSU (Boxed)

SKU 6330 Brand Seasonic EAN13 4711173878544
850W ATX PSU with 80 PLUS Gold efficiency (90% at 50% load), Active PFC, LLC design, Smart & Silent Fan Control. Single +12V rail 840W/70A. Non-modular, 120mm fan, 5-year warranty.
PSU (Power Supplies) - Wattage 800 - 899 W
PSU (Power Supplies) - Efficiency Rating 80 Plus Gold
PSU (Power Supplies) - Color Black
PSU (Power Supplies) - Modularity Non-modular
PSU (Power Supplies) - PCIe GPU Connectors 4x 8/6 pins
PSU (Power Supplies) - Length 141-160 mm
PSU (Power Supplies) - EPS CPU Connectors 2x 4+4pin EPS/ATX12V

The Seasonic G12 GC-850 is a reliable 850W ATX power supply certified 80 PLUS Gold, delivering at least 87/90/87% efficiency at 20/50/100% loads. It features Active PFC, LLC resonant converter design for reduced energy waste, and Seasonic's Smart & Silent Fan Control (S2FC) with a 120mm sleeve-bearing fan for optimal cooling and low noise.

Equipped with a powerful single +12V rail (70A/840W) ideal for modern gaming PCs and workstations, it includes full protections: OCP, OVP, OPP, SCP, OTP. Non-modular cabling ensures straightforward installation, with 4x PCIe 6+2-pin connectors for high-end GPUs and 2x 4+4-pin EPS for CPUs. Built by Helly OEM under Seasonic specs, backed by 5-year warranty.

  • 80 PLUS Gold certified efficiency
  • Smart & Silent 120mm fan control
  • Single rail +12V 840W
  • Complete protections (OCP/OVP/OPP/SCP/OTP)
  • Non-modular, fixed cables
  • 5-year limited warranty
Total power850 W
AC input voltage100 - 240 V
AC input frequency50/60 Hz
Input current8 A
Combined power (+3.3V)100 W
Combined power (+12V)840 W
Combined power (-12V)3.6 W
Combined power (+5Vsb)12.5 W
Max output current (+3.3V)20 A
Max output current (+12V)70 A
Max output current (-12V)0.3 A
Max output current (+5Vsb)2.5 A
Efficiency90%
Power protection featuresOver current, Over power, Under voltage, Over total voltage, Over voltage, Short circuit, Over temperature
Cabling typeNon-Modular
80 PLUS certification80 PLUS Gold
PurposePC
Power supply unit (PSU) form factorATX
Mean time between failures (MTBF)100000 h
Product colourBlack
Cooling typeActive
Fan diameter12 cm
Number of fans1 fan(s)
Fan bearing technologySleeve
On/off switchYes
Operating temperature (T-T)0 - 50 °C
Cables includedAC, CPU, PCIe, SATA
PCIe connectors4x 6+2-pin
EPS/ATX12V connectors2x 4+4-pin
Compliance certificatesREACH, RoHS, WEEE
CertificationcTUVus, TUV, CB, CCC, BSMI, CE, FCC
Width150 mm
Depth140 mm
Height86 mm
Package typeBox
Warranty period5 years