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Black rectangular ATX power supply with 135 mm fan and modular cable sockets

MSI

MSI MPG A850GS PCIE5 850 W power supply

SKU CH-3TDR-6R4YK MPN MPG A850GS PCIE5

Fully modular 850 W ATX unit with two native 12V-2x6 connectors, 80 Plus Gold efficiency up to 90%, a 135 mm FDB fan with zero-fan mode and a compact 150 mm depth for easier cable routing

  • Max wattage850 W
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • 12V rails2
  • SATA power connectors8

Model ATX 3.1 (850W) Dual 12V-2x6

Show 3 more
  • 850 W output supports demanding gaming builds
  • 80 PLUS Gold efficiency up to 90 % reduces waste heat
  • Two native 12V-2x6 connectors deliver 600 W each for PCIe 5.1 graphics cards
  • 135 mm FDB fan with Zero Fan Mode keeps noise low
  • Compact 150 mm depth fits most cases and eases cable routing

850 W ATX 3.1 power supply

The MSI MPG A850GS PCIE5 is a fully modular ATX12V unit rated at 850 W. It targets gaming PCs and workstations that need PCIe 5.1 readiness and 80 Plus Gold efficiency. Two native 12V-2x6 connectors each support up to 600 W for modern graphics cards. The compact 150 mm length eases installation in standard cases.

Thermals noise and power draw

A 135 mm fluid-dynamic bearing fan runs quietly at low load and supports a zero-fan mode for silent idle operation. Active PFC and up to 90 % efficiency keep waste heat low across the 100-240 V input range. Protections include OVP, OCP, OTP, OPP, SCP and UVP for stable delivery under normal use.

Sustained load behavior

Dual +12 V rails and server-grade capacitors maintain steady output during extended gaming or rendering sessions. The 150 mm form factor leaves room for case airflow, helping the PSU stay cool when pushed continuously. Full modular cabling with embossed jackets reduces clutter, supporting consistent thermal performance over long periods.

How it compares

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

Price $82.99
Cheaper than about 74% 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 nameMPG A850GS PCIE5
Product colorBlack
Product typeATX12 V
Ports & slots
SATA power connectors8
Power
Max wattage850 W
Modular cablingFull Modular
Power factor correctionActive
12V rails2
Efficiency certificationUp to 90%
Built-in protectionOVP/ OCP/ OTP/ OPP/ SCP/ UVP
Supply voltage100–240 V
AC input frequency50/60 Hz
Size & build
Shipping weight3.15 kg
Package size305 × 229 × 140 mm
Compatibility
PSU length limit150 mm
More details
Fan configuration1 × 135 mm

Other versions of this model

5 more in the same range

Questions about this item

How do I install the two native 12V-2x6 cables from this fully modular 850 W unit?

Plug each 12V-2x6 cable into its dedicated socket on the PSU side, route the embossed-jacket cables to the graphics card, and seat both connectors fully — the step people miss is leaving a gap that prevents the 600 W per connector rating from being met.

What maintenance will the 135 mm FDB fan and the server-grade capacitors need later?

The fluid-dynamic bearing fan is sealed for life; simply blow dust out of the vent once a year — the capacitors are rated for long-term operation at up to 90 % efficiency and require no user service.

Which limit appears first during sustained full-load use on the dual +12 V rails?

The 850 W total-output ceiling is reached before either individual +12 V rail hits its own current limit, so the unit throttles or shuts down via OPP when combined draw exceeds 850 W.

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