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Rectangular ATX power supply unit with matte black finish and single 135 mm fan grille

MSI

MSI MPG A850G PCIE 5 850 W power supply

SKU CH-WGNB-N2VZR MPN MPG A850G PCIE 5

Delivers 850 W through a fully modular ATX 3.1 and PCIe 5.1 compatible design with 80 PLUS Gold efficiency, 100 % Japanese capacitors and a native 12V-2x6 connector

  • Max wattage850 W
  • Power efficiency> 85%
  • Modular cablingNo
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • Main power connector20+4 Pin

Model ATX 3.1 (850W)

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  • 850 W maximum power for demanding builds
  • 80 PLUS Gold certified efficiency above 85 %
  • ATX 3.1 and PCIe 5.1 ready for modern GPUs
  • 100 % Japanese 105 °C capacitors for long-term reliability
  • Fully modular flat cables simplify cable management

Ready for next-generation graphics

The MSI MPG A850G PCIE5 is an 850 W ATX 12V unit certified to ATX 3.1 and PCIe 5.1. It delivers stable power for high-performance graphics cards without adapters. 80 PLUS Gold efficiency and 100% Japanese 105° C capacitors keep energy loss low. A fully modular design lets builders connect only the cables they need.

Build integration

Flat cables reduce clutter and improve airflow inside the case. The unit provides a native 12V-2x6 connector plus two 6+2-pin PCIe plugs and sixteen SATA power connectors. Active PFC and a DC-DC module design supply clean voltage across two +12 V rails. Industrial-grade protections cover OCP, OVP, OPP, OTP, SCP and UVP. Input range spans 100–240 V at 50/60 Hz.

Sustained-load behaviour

A single 135 mm fan meets Cybenetics Standard++ noise certification for quiet operation under load. Gold-rated efficiency stays above 85% across typical loads, limiting waste heat during long sessions. Japanese capacitors rated for 105° C maintain ripple suppression when the system runs continuously. Protection circuits guard against over-current and over-temperature events during extended gaming or rendering.

How it compares

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

Price $100.99
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
Product lineRMx Series
Model nameMPG A850G PCIE5
Product typeATX 12 V
Product colorBlack
Performance
Frequency50/60 Hz
Graphics
SLI supportCertified
Ports & slots
PCIe power connectors2 × 6+2-Pin
SATA power connectors16
Output type850 W
Connection types1 × 16 pin PCIe / 1 × 24 pin ATX / 1 × 8 pin (4+4) EPS (CPU) / 1 x Floppy / 4 × 4 pin Peripheral / 6 × 8 pin (6+2) PCIe / 8 x SATA
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 frequency50/60 Hz
Rated input current10A @ 115 V, 5A @ 230 V
Built-in protectionOCP,OVP,OPP,OTP, 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 dimensions150 mm × 150 mm × 86 mm
Product dimensions20'
Product weight3.2508 kg
Top fans size120 mm
Rear fans size120 mm
Shipping weight3.23 kg
Package size295 × 235 × 130 mm
Compatibility
PSU length limit150 mm
In the box
Included itemsMPG, 306-7ZP7B11-CE0, 1, false
Fans total quantity1
Environment & compliance
PSU noise ratingCybenetics Standard ++
Regulatory approvalsTrue, not applicable
Top fans noise levelAir
More details
Fan configuration1 × 135 mm
Fan LEDRGB

Other versions of this model

5 more in the same range

Questions about this item

Does the 850 W unit hold its output continuously or does it throttle under sustained load?

It delivers 850 W continuously with 80 PLUS Gold efficiency and dual +12 V rails rated for full power.

How loud is the 135 mm fan and what thermal rating do the capacitors carry when the PSU runs all day?

The fan meets Cybenetics Standard ++ for low noise, and all electrolytic capacitors are Japanese 105 °C rated.

Which motherboard and graphics-card connectors must my build already provide for this fully modular unit to work?

You need a 20+4 pin ATX motherboard header and a 12V-2x6 (12VHPWR) GPU header; all other cables attach to the PSU side only.

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