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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

  • TypeATX 12V
  • Maximum Power850 W
  • ModularNo
  • Fans1 x 135 mm
  • PFCActive
  • Main Connector20+4 Pin

Options ATX 3.1 (850W)

  • 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.

Highlights

  • 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

Specifications

BrandMSI
ModelMPG A850G PCIE5
SeriesRMx Series
TypeATX 12V
Maximum Power850 W
ModularNo
Fans1 x 135 mm
PFCActive
Main Connector20+4 Pin
+12V Rails2
PCI-Express Connector2 x 6+2-Pin
SATA Power Connector16
Efficiency> 85%
Energy-Efficient80 PLUS GOLD Certified
PSU Noise LevelCybenetics Standard ++
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current10A @ 115V, 5A @ 230V
Output850 watts
Approvalstrue, not_applicable
Connectors1 x 16 pin PCIe / 1 x 24 pin ATX / 1 x 8 pin (4+4) EPS (CPU) / 1 x Floppy / 4 x 4 pin Peripheral / 6 x 8 pin (6+2) PCIe / 8 x SATA
ColorBlack
Fan LEDRGB
Max PSU Length150 mm
ProtectionOCP,OVP,OPP,OTP, SCP,UVP
Cable Spec1 x ATX Cable
2 x EPS (8 PIN to 4+4 PIN) Cable
2 x PCIe (8 PIN to 6+2 PIN) Cable
1 x PCIe (16 PIN to 16 PIN) Cable
1 x PCIe (16 PIN to 6+2 PIN) Cable
2 x SATA Sleeved Cable
1 x SATA Sleeved Cable
1 x MOLEX/FDD Sleeved Cable
Power Rating600W
Peak Power850 watts
SLICertified
Size/Dimensions150 mm x 150 mm x 86 mm
Dimensions20'
Weight3.2508 kilograms
Package ContentMPG, 306-7ZP7B11-CE0, 1, false
Frequency Range50/60 Hz
+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
12V Power Connector1 x 4 Pin ATX 12V
Floppy Connector1
Peripheral Connector1
Fans Total Quantity1
Top Fans Size120mm
Top Fans Noise LevelAir
Rear Fans Size120mm
FeaturesMPG, Full Modular, full, Air, atx,pcie, 10 years, 850W, MPG A850G PCIE5
Shipping weight3.23 kg
Package size295 × 235 × 130 mm

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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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