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Black rectangular ATX power supply unit with embossed jacket cables and a 120 mm fan grille

MSI

MSI MAG A750BN PCIE5 III 750W power supply

SKU CH-JBE8-0343W MPN MAG A750BN PCIE5 III

A 750W non-modular ATX 3.1 power supply with a native 12V-2x6 connector for PCIe 5.1 graphics cards and 80 PLUS Bronze efficiency

  • Max wattage750 W
  • Modular cablingNo
  • Fan configuration1 × 120 mm
  • Power factor correctionActive
  • Efficiency certification80 PLUS Bronze (up to 85%)
  • Built-in protectionOVP, OCP, SCP, OPP, UVP

Model ATX 80+ Bronze (750W) PCIE5 III

  • Up to 85% efficiency with 80 PLUS Bronze certification
  • Native 12V-2x6 connector delivers up to 450W to PCIe 5.1 graphics cards
  • ATX 3.1 ready for 2x total and 3x GPU power excursions
  • Copper-alloy terminals resist oxidation during high-current surges
  • 120 mm hydraulic bearing fan cools the 750W unit in a compact 140mm x 150mm x 86mm frame

750 W non-modular ATX 3.1 power supply

The MSI MAG A750BN PCIE5 III delivers 750 W of continuous power through a fixed cable set. It targets system builders who need a compact unit with a native 12V-2x6 connector for modern graphics cards. The 120 mm hydraulic bearing fan provides cooling across the operating range. Input voltage spans 100 to 240 V at 50 to 60 Hz.

Sustained load behaviour and protection

Under continuous demand the DC-to-DC design maintains stable output while the 80 PLUS Bronze rating confirms up to 85 percent efficiency at typical loads. Industrial-grade protections include OVP, OCP, SCP, OPP and UVP to guard components during prolonged stress. The fan curve responds to thermal load rather than short spikes, keeping acoustic output consistent during extended sessions.

ATX 3.1 excursion limits

ATX 3.1 compliance means the unit can absorb up to two times total power excursions and three times GPU power excursions without shutdown. The native 12V-2x6 cable is rated to supply 450 W to a PCIe 5.1 graphics card and uses yellow highlights to indicate secure seating. Copper-alloy terminals and UL-certified cables reduce resistance and oxidation risk at high current.

How it compares

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

Price $55.99
Cheaper than about 88% of the 10,869 comparable items (median $142.99).
Max wattage 750 W
Lower than about 60% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameMSI
Model nameMAG A750BN PCIE5 III
Product colorBlack
Power
Max wattage750 W
Modular cablingNo
Power factor correctionActive
Efficiency certification80 PLUS Bronze (up to 85%)
Built-in protectionOVP, OCP, SCP, OPP, UVP
Supply voltage100–240 V
AC input frequency50-60 Hz
Size & build
Product dimensions140 mm × 150 mm × 86 mm / 5.51 × 5.9 × 3.38 in
Shipping weight2.22 kg
Package size267 × 191 × 114 mm
More details
Fan configuration1 × 120 mm

Other versions of this model

4 more in the same range

Questions about this item

How loud does the 120 mm fan get when the 750 W supply runs all day?

The unit uses a single 120 mm hydraulic-bearing fan designed for low-noise operation; under continuous load the fan speed ramps with temperature, so acoustics stay moderate even at sustained output.

What must my case and motherboard already provide for this non-modular 750 W unit to fit and power on?

You need an ATX-form-factor case with at least 140 mm depth clearance and a standard 24-pin ATX motherboard connector plus the required 8-pin CPU and PCIe leads, all of which are permanently attached to the PSU.

Will the native 12V-2x6 cable deliver 450 W to a PCIe 5.1 graphics card while my older 8-pin GPU stays on the same 750 W supply?

Yes, the 12V-2x6 connector is rated for up to 450 W for PCIe 5.1 cards, and the remaining fixed cables include traditional 6+2-pin PCIe plugs so legacy GPUs can run simultaneously within the 750 W total budget.

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