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Black fully modular ATX power supply with 135 mm fan

MSI

MSI MPG A1250GS PCIE5 II 1250W power supply

SKU CH-E43Y-GVH9T MPN MPG A1250GS PCIE5 II

A fully modular 1250 W ATX power supply with dual native 12V-2x6 connectors, 80 PLUS Gold efficiency and a 135 mm FDB fan

  • Max wattage1250 W
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm
  • Power factor correctionActive
  • Efficiency certification80 PLUS GOLD Certified
  • Built-in protectionOVP, OCP, OTP, OPP , SCP, UVP

Model ATX 3.1 (1250W) Dual 12V-2x6 + 3x 8-Pin

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  • Delivers 1250 W to power demanding GPUs and CPUs
  • 80 PLUS Gold certification reaches up to 90 % efficiency
  • Dual native 12V-2x6 connectors supply up to 600 W each for PCIe 5.1 graphics cards
  • 135 mm fluid-dynamic bearing fan and Zero Fan Mode keep noise to a whisper
  • Compact 150 mm depth frees space for airflow and cable routing

Built for PCIe 5.1 GPUs and AI workloads

This 1250 W ATX 3.1 power supply targets builders who need stable delivery for NVIDIA 50-series graphics cards and machine-learning systems. Dual native 12V-2x6 connectors each provide up to 600 W, matching the latest GPU power specification. 80 PLUS Gold certification guarantees up to 90 percent efficiency at typical loads.

Straightforward full-modular installation

All cables detach, so only the required leads enter the case, simplifying routing and airflow. Embossed jacket sleeving protects wires during handling, while premium copper-alloy connectors ensure firm seating. The 135 mm fluid-dynamic bearing fan fits the standard ATX 150 mm depth, avoiding clearance issues in most chassis.

ATX 3.1 excursion limits define headroom

The design meets Intel PSDG ATX 3.1, sustaining 235 percent total power excursion and 3x GPU power excursion for short bursts. Input range covers 100 to 240 V at 50 to 60 Hz with a maximum 15 A draw. Active PFC and a semi-digital LLC controller maintain tight regulation under dynamic loads.

How it compares

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

Price $159.99
Pricier than about 54% of the 10,869 comparable items (median $142.99).
Max wattage 1250 W
Higher than about 90% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameMSI
Model nameMPG A1250GS PCIE5 II
Product colorBlack
Product typeATX12 V
Power
Max wattage1250 W
Modular cablingFull Modular
Power factor correctionActive
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOVP, OCP, OTP, OPP , SCP, UVP
Supply voltage100–240 V
AC input frequency50 Hz ~ 60 Hz
Rated input current15A (Max.)
Size & build
Product dimensions11.89 × 10.04 × 5.08 in
Product weight7.61 lb (3.45 kg)
Shipping weight3.72 kg
Package size305 × 229 × 133 mm
More details
Fan configuration1 × 135 mm

Other versions of this model

5 more in the same range

Questions about this item

Will the dual 12V-2x6 connectors each deliver 600 W for PCIe 5.1 graphics cards?

Yes, the two native 12V-2x6 cables are rated for up to 600 W per connector, matching the PCIe 5.1 specification.

Does the 150 mm depth leave room for cable routing in standard ATX cases?

The compact 150 mm length and width fit most ATX chassis, freeing extra space for cable management and airflow.

What protections are built in against voltage or current faults?

The unit includes over-voltage, over-current, over-temperature, over-power, short-circuit and under-voltage protection circuits.

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