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Black rectangular ATX power supply with 135 mm fan and fully modular cables

MSI

MSI MAG A850GLS PCIE5 power supply 850W 80+ Gold ATX 3.1 PCIe 5.1

SKU CH-9RTV-CZ82H MPN MAG A850GLS PCIE5

Fully modular 850 W ATX 3.1 unit with native 12V-2x6 connector for PCIe 5.1 GPUs, 80 Plus Gold efficiency, 135 mm FDB fan and 150 mm compact depth

  • ColorBlack
  • TypeATX12V
  • Maximum Power850 W
  • Fans1 x 135 mm
  • PFCActive
  • Energy-Efficient80 PLUS GOLD Certified

Type 2026 ATX 3.1 (850W)

  • 80 Plus Gold certification delivers up to 90% efficiency for lower running costs
  • Native 12V-2x6 connector supplies up to 600 W to PCIe 5.1 graphics cards
  • ATX 3.1 design handles 220% total power excursions and 3x GPU spikes
  • 135 mm fluid-dynamic bearing fan runs at Cybenetics A+ noise levels
  • Compact 150 mm depth frees space for cable routing and airflow

850 W ATX 3.1 Power Supply

The MSI MAG A850GLS PCIE5 is a fully modular ATX 3.1 power supply rated at 850 W. It carries 80 PLUS Gold certification for up to 90 % efficiency and meets PCIe 5.1 requirements with a native 12V-2x6 connector. A 135 mm fluid-dynamic bearing fan keeps noise at Cybenetics A+ levels.

PCIe 5.1 GPU builders and compact-case builders

This unit suits builders installing a PCIe 5.1 graphics card such as an RTX 50 series model because the native 16-pin cable delivers up to 600 W without adapters. The 150 mm depth fits most cases and eases cable routing. Systems that need more than 850 W or lack ATX 3.1 support should consider a higher-wattage or legacy-design unit.

Native 12V-2x6 connector for 600 W GPU power

The single specification that decides fit is the native 12V-2x6 (16-pin) PCIe 5.1 connector rated for 600 W. If the graphics card requires that connector, this supply connects directly; if the card uses only 8-pin PCIe plugs, a different PSU or adapter will be needed.

Highlights

  • 80 Plus Gold certification delivers up to 90% efficiency for lower running costs
  • Native 12V-2x6 connector supplies up to 600 W to PCIe 5.1 graphics cards
  • ATX 3.1 design handles 220% total power excursions and 3x GPU spikes
  • 135 mm fluid-dynamic bearing fan runs at Cybenetics A+ noise levels
  • Compact 150 mm depth frees space for cable routing and airflow

Specifications

BrandMSI
ModelMAG A850GLS PCIE5
ColorBlack
TypeATX12V
Maximum Power850 W
Fans1 x 135 mm
PFCActive
Energy-Efficient80 PLUS GOLD Certified
PSU Noise LevelCybenetics A+
Input Voltage100 - 240 V
Shipping weight3.08 kg
Package size305 × 254 × 152 mm

Other versions of this model

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Questions about this item

What ATX standard does the MAG A850GLS PCIE5 follow and what excursion limits does it support?

The unit is ATX 3.1 ready and can handle up to 220% total power excursions and 3x GPU power excursions.

What are the physical dimensions that determine case fit?

It uses a compact ATX form factor measuring 150 mm long and 150 mm wide.

How is the native 12V-2x6 cable connected and what mistake should be avoided?

Plug the native 16-pin connector fully into the GPU until it clicks; the yellow highlights help confirm a secure seat and prevent a loose connection.

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