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Rectangular black ATX power supply, fully modular, 140 mm long, 120 mm HDB fan visible

Seasonic

Seasonic CORE GX-750 ATX3 750 W power supply

SKU CH-MNRY-5NM5F MPN CORE GX-750 ATX3

A fully modular 750 W ATX power supply with a 120 mm hydro dynamic bearing fan and 80 PLUS Gold certification

  • TypeATX Fully Modular
  • Maximum Power750 W
  • Fans120 mm Hydro Dynamic Bearing (HDB) Fan
  • PCI-Express ConnectorATX 3 and 16-Pin PCIe Gen 5 Cable (12V-2x6)
  • Max PSU Length140 mm
  • ModularFull Modular

Options 750W

  • Fully modular cables simplify builds and improve airflow
  • 750 W maximum power supports demanding components
  • 80 PLUS GOLD certification delivers high energy efficiency
  • 120 mm HDB fan runs quietly under load
  • Compact 140 mm length fits smaller cases

750 W ATX 3 fully modular PSU

The Seasonic CORE GX-750 ATX3 delivers 750 W through a fully modular ATX design. It targets builders who need a compact, gold-rated unit for modern graphics cards. The 12V-2x6 connector supports current GPU power standards without adapters. It suits systems that value cable management and efficiency headroom.

Hydro dynamic bearing fan and short chassis

A 120 mm hydro dynamic bearing fan handles cooling while the 140 mm depth fits tight cases. Full modularity means only required cables stay installed, reducing clutter and improving airflow. The ATX 3 compliant 16-pin PCIe Gen 5 cable ships attached to the modular board for direct GPU connection. Builders who need a second 12V-2x6 cable cannot use this unit.

Gold efficiency with quiet operation

80 PLUS Gold certification confirms high efficiency across typical loads, lowering waste heat and electricity draw. The hydro dynamic bearing fan runs quietly at low rpm during normal desktop and gaming workloads. Power delivery remains stable through the single 12V-2x6 output without audible coil whine under load. Users expecting silent operation at extreme sustained loads should verify reviews.

Highlights

  • Fully modular cables simplify builds and improve airflow
  • 750 W maximum power supports demanding components
  • 80 PLUS GOLD certification delivers high energy efficiency
  • 120 mm HDB fan runs quietly under load
  • Compact 140 mm length fits smaller cases

Specifications

BrandSeaSonic
ModelCORE GX-750 ATX3
TypeATX Fully Modular
Maximum Power750 W
Fans120 mm Hydro Dynamic Bearing (HDB) Fan
PCI-Express ConnectorATX 3 and 16-Pin PCIe Gen 5 Cable (12V-2x6)
Max PSU Length140 mm
ModularFull Modular
Energy-Efficient80 PLUS GOLD Certified
Shipping weight2.95 kg
Package size304 × 178 × 114 mm

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Questions about this item

What PCIe connector standard does the CORE GX-750 ATX3 use and what is its pin configuration?

It includes an ATX 3 compliant 16-pin PCIe Gen 5 cable with a 12V-2x6 connector for modern graphics cards.

What is the maximum length of this PSU and will it fit a standard ATX case?

The unit measures 140 mm long, matching the typical ATX form factor and fitting most mid-tower and full-tower cases.

How do I install the fully modular cables and what is the common mistake to avoid?

Connect only the cables your build needs to the PSU sockets first, then route them to components; the frequent error is forcing a cable into the wrong keyed port.

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