MSI
MSI MPG A850GS PCIE5 850 W power supply
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
- ColorBlack
- TypeATX12V
- Maximum Power850 W
- Fans1 x 135 mm
- PFCActive
- +12V Rails2
Options ATX 3.1 (850W) Dual 12V-2x6
- 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.
Highlights
- 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
Specifications
| Brand | MSI |
|---|---|
| Model | MPG A850GS PCIE5 |
| Color | Black |
| Type | ATX12V |
| Maximum Power | 850 W |
| Fans | 1 x 135 mm |
| PFC | Active |
| +12V Rails | 2 |
| SATA Power Connector | 8 |
| Max PSU Length | 150 mm |
| Modular | Full Modular |
| Energy-Efficient | Up to 90% |
| Protection | OVP/ OCP/ OTP/ OPP/ SCP/ UVP |
| Input Voltage | 100 - 240 V |
| Input Frequency Range | 50/60 Hz |
| Shipping weight | 3.15 kg |
| Package size | 305 × 229 × 140 mm |
Other versions of this model
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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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