[ ATX DESKTOP POWER // IDENTIFIED MODEL ]
MSI MPG A850G PCIE5
An 850 W fully modular ATX model with an original PCIe 5.0-era 12VHPWR cable. The exact model is MPG A850G PCIE5; do not conflate it with MSI MAG A850GL PCIE5 or MPG A850G PCIE5 II revisions. Specifications below are manufacturer-source references; the physical unit’s nameplate and matching manual control.
HIGH-VOLTAGE SAFETY: Disconnect AC before external inspection. Never open, probe, or repair a PSU internally; hazardous charge can persist after unplugging. Replace a damaged, wet, burnt, modified or unidentified unit, or use qualified service.
Model-specific specifications
| Manufacturer / exact model | MSI MPG A850G PCIE5; model / SKU MPG A850G PCIE5. Match the complete regional suffix, hardware revision and label. |
|---|---|
| Rated capacity | 850 W continuous total output as the manufacturer-rated class; combined rail limits and operating-temperature derating remain model-specific. |
| Efficiency certification | 80 PLUS Gold, listed by the manufacturer for this named model. Certification does not identify an unknown PSU revision or establish used-unit condition. |
| AC input | 100–240 V AC, 12–6 A, 50–60 Hz; follow the unit label for region-specific current rating. |
| DC rails | +12 V: 70.8 A (850 W); +3.3 V and +5 V: 20 A each, 100 W combined; −12 V: 0.3 A; +5 VSB: 3 A. Confirm the full combined-load table on the model label/manual. |
| Connector set | 24-pin ATX; two 4+4-pin EPS; one 16-pin 12VHPWR (600 W class); six PCIe 6+2-pin; eight SATA; four peripheral 4-pin; one FDD. |
| ATX / PCIe revision | ATX12V 3.0 / PCIe 5.0 generation; native 12VHPWR is not the later 12V-2x6 interface. |
| Mechanical envelope | 150 × 150 × 86 mm (depth × width × height). Verify mounting holes, fan/grille clearance, cable exit/side-panel clearance and tolerance against the case drawing. |
| Protections | OCP, OVP, OPP, OTP, SCP and UVP. Protection labels do not guarantee a safe outcome under a fault; use only a healthy, unmodified unit within its documented ratings. |
Compatibility & revision caveats
- The included 12VHPWR lead and its insertion/bend limits are specific to the documented generation. Check connector seating, GPU input requirements, motherboard EPS needs, and the physical unit label. Never transfer modular leads between PSU families.
- Confirm motherboard 24-pin and EPS count/pinout, GPU cable type, total power, rail limits, chassis dimensions, cooling clearance, region and full model suffix before purchase or installation.
- Modular PSU-side pinouts are not standardized. A cable that physically fits is not evidence of electrical compatibility; use only leads explicitly approved for this exact model/revision.
- ATX, ATX12V and PCIe connector revisions describe interfaces, not quality, safety certification or automatic compatibility with every PC component.
Manufacturer product and manual sources
- MSI MPG A850G PCIE5 specificationsMSI model specification page; verify the regional model listing and the exact PSU label.
- MSI MPG A850G / A1000G / A750G PCIE5 user manual (PDF)MSI installation and cable documentation for this named PCIE5 product family.
When a broad product-family page conflicts with a model-specific manual, label or cable table, the exact unit label and corresponding model documentation take precedence.