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Rectangular black ATX power supply unit with semi-modular cable sockets and 120mm fan grille

Seasonic

Seasonic FOCUS GM-850 850W 80 Plus Gold Semi-Modular Power Supply

SKU CH-NYXJ-0YMQZ

Semi-modular 850 W ATX unit with 80 Plus Gold efficiency, 140 mm depth and a 120 mm fluid-dynamic-bearing fan

  • TypeATX
  • Maximum Power850W
  • 850 W output powers demanding multi-GPU builds
  • 80 PLUS Gold certification keeps efficiency high across loads
  • Semi-modular cabling reduces clutter inside the case
  • 140 mm depth fits compact ATX chassis easily
  • 120 mm fluid-dynamic-bearing fan runs quietly under load

850 W ATX Power Supply for Multi-GPU Builds

This Seasonic FOCUS GM-850 delivers 850 W of continuous power in a standard ATX form factor. It is aimed at system builders who need reliable energy delivery for high-end graphics configurations. The unit carries 80 PLUS Gold certification for efficient operation. Multi-GPU support is confirmed for both SLI and CrossFire setups.

Semi-Modular Cabling and Compact 140 mm Depth

A semi-modular cable layout lets you attach only the leads your build requires, reducing clutter inside the case. The power supply measures 140 mm deep, fitting easily into many mid-tower and compact chassis. Gold-plated connectors resist corrosion over long service intervals. A cable-free internal connection design removes solder points between the main PCB and the modular board for cleaner signal paths.

Smart Fan Control and DC-to-DC Conversion

A 120 mm fluid dynamic bearing fan is governed by S2FC smart and silent fan control, adjusting speed to thermal load. DC-to-DC converter architecture provides tight voltage regulation on the minor rails. Protections include over-voltage protection on all outputs. The unit is rated for 100 000 hours MTBF at 25 °C, excluding the fan.

Highlights

  • 850 W output powers demanding multi-GPU builds
  • 80 PLUS Gold certification keeps efficiency high across loads
  • Semi-modular cabling reduces clutter inside the case
  • 140 mm depth fits compact ATX chassis easily
  • 120 mm fluid-dynamic-bearing fan runs quietly under load

Specifications

BrandSeaSonic USA
Part NumberSSR-850FM
TypeATX
Maximum Power850W

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