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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

  • Max wattage850 W
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • Efficiency certification80 PLUS GOLD Certified
  • PSU noise ratingCybenetics A+
  • Supply voltage100–240 V

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.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $101.99
Cheaper than about 67% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameMSI
Model nameMAG A850GLS PCIE5
Product colorBlack
Product typeATX12 V
Power
Max wattage850 W
Power factor correctionActive
Efficiency certification80 PLUS GOLD Certified
Supply voltage100–240 V
Size & build
Shipping weight3.08 kg
Package size305 × 254 × 152 mm
Environment & compliance
PSU noise ratingCybenetics A+
More details
Fan configuration1 × 135 mm

Other versions of this model

5 more in the same range

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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