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Black rectangular ATX power supply with 120 mm fan grille and modular cable sockets

MSI

MSI MAG A850GL PCIE5 850W power supply

SKU CH-9TG4-1W5PV MPN MAG A850GL PCIE5

An 850 W ATX 3.1 power supply with 80 PLUS Gold efficiency, PCIe 5.1 support and a native 12V-2x6 cable for modern GPUs

  • Max wattage850 W
  • Power efficiency> 85%
  • Modular cablingNo
  • Fan configuration1 × 120 mm
  • Power factor correctionActive
  • Main power connector20+4 Pin

Type ATX 3.1 (850W)

  • 850 W output for demanding builds
  • 80 PLUS Gold certified efficiency up to 90 %
  • ATX 3.1 and PCIe 5.1 ready for modern GPUs
  • Native 12V-2x6 connector delivers up to 600 W to graphics cards
  • Compact 140 mm depth fits most cases

Compact 850 W ATX 3.1 unit

The MSI MAG A850GL PCIE5 is an 850 W ATX 3.1 power supply with 80 PLUS Gold certification. It delivers up to 600 W through a native 12V-2x6 connector for PCIe 5.1 graphics cards. The fully modular design lets builders attach only the cables they need. A 120 mm Fluid Dynamic Bearing fan handles cooling.

Suits PCIe 5.1 GPU builds.

This unit suits systems that need a native 16-pin GPU connector and high efficiency at 850 W. Builders who prefer a fixed-cable layout or who require more than 850 W should look at something else. The compact 140 mm depth fits most standard ATX cases. It operates on 100-240 V input worldwide.

Sustains 850 W with Gold efficiency

Under sustained load the supply maintains its 850 W rating while 80 PLUS Gold efficiency keeps waste heat low. ATX 3.1 compliance allows 2x total power excursions and 3x GPU power excursions for short bursts. The single 120 mm FDB fan speed ramps with temperature to maintain stable output. Active PFC and dual +12 V rails support consistent delivery.

How it compares

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

Price $93.99
Cheaper than about 70% 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
Product lineRMx Series
Model nameMAG A850GL PCIE5
Product typeATX 12 V
Product colorBlack
Performance
Frequency50/60 Hz
Graphics
SLI supportCertified
Ports & slots
SATA power connectors16
Output type+3.3 V@20A, +5 V@20A
Connection types1 x MB (24/20 pins)
2 x CPU (8/4 pins)
4 x PCIe (8/6 pins)
1 × 12VHPWR (PCI-E 5.0)
8 x SATA
4 x Molex
1 x Molex to FDD Adapter
12V power connector1 × 4 Pin ATX 12 V
Floppy connector1
Peripheral connector1
Power
Max wattage850 W
Power efficiency> 85%
Modular cablingNo
Power factor correctionActive
Main power connector20+4 Pin
12V rails2
Efficiency certification80 PLUS GOLD Certified
Supply voltage100–240 V
AC input frequency47–63 Hz
Rated input current10A @ 115 V, 5A @ 230 V
Built-in protectionOVP, OCP, OTP, OPP , SCP, UVP
Rated power600 W
Peak wattage850 W
+3.3V max. current8A
+12V1 max. current9A
+12V2 max. current10A
+12V3 max. current30A
+12V4 max. current28A
+12V5 max. current29A
+12V6 max. current28A
+5VSB max. current5A
Size & build
Size or dimensions12 in × 8.75 in × 4.92 in
Product dimensions20'
Product weight2.82 kg
Top fans size120 mm
Rear fans size120 mm
Shipping weight2.88 kg
Package size305 × 229 × 133 mm
Compatibility
PSU length limit150 mm
In the box
Included itemsa850gl, MPG A850GL, 1, false
Fans total quantity1
Environment & compliance
Regulatory approvalsTrue, not applicable
Top fans noise levelAir
More details
Fan configuration1 × 120 mm
Fan LEDRGB

Other versions of this model

5 more in the same range

Questions about this item

Will the 12VHPWR connector deliver 600 W to a PCIe 5.0 graphics card?

Yes, the native 16-pin 12VHPWR cable is rated for up to 600 W on a PCIe 5.0 GPU.

Does the fully modular design let me remove every unused cable?

All cables detach from the unit, so only the connectors needed for the build remain installed.

What ATX specification does this unit meet for power excursions?

It complies with ATX 3.0, supporting 2x total and 3x GPU power excursions.

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