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Rectangular black PSU with full modular sockets, single 120mm fan grille, 140mm depth

Rosewill

Rosewill CMG1000G5 1000W ATX 3.0 3.1 80+ Gold full modular power supply

SKU CH-A41E-H3F2C MPN CMG1000G5

A 1000 W ATX 3.0 and 3.1 compatible, fully modular power supply with 80 PLUS Gold efficiency, a native 600 W PCIe 5.0 12V-2x6 connector.

  • Max wattage1000 W
  • Power efficiencyUp to 92%
  • Modular cablingFull Modular
  • Fan configuration1 x Silent 120 mm FDB fan
  • Power factor correctionActive
  • Main power connector20+4Pin

Model CMG ATX 3.1 (1000W)

  • ATX 3.0 and 3.1 ready for modern GPU compatibility
  • 80 Plus Gold certified at up to 92 percent efficiency
  • Native 600W PCIe 5.0 12V-2x6 connector for high-power graphics cards
  • 100 percent Japanese electrolytic capacitors for long-term reliability
  • Fully modular design with 140mm compact length simplifies cable routing

1000 W ATX 3.0 3.1 power supply

This 1000 W unit meets ATX 3.0 and ATX 3.1 specifications for modern desktop builds. It targets system integrators and enthusiasts who need a single 12 V rail and full modular cabling. The 80 PLUS Gold rating confirms up to 92 % efficiency at typical loads. It is built for high-end graphics cards and multi-GPU configurations.

Full modular design with Japanese capacitors

A fully modular layout lets builders connect only the cables required, reducing clutter and improving airflow. All electrolytic capacitors are sourced from Japanese manufacturers for long-term reliability. The 120 mm fluid dynamic bearing fan runs quietly and stops completely under light loads via ECO mode. The compact 140 mm depth fits most standard chassis.

Native 600 W 12V-2x6 connector for GPU upgrades

One native 12+4 pin 12V-2x6 cable delivers up to 600 W to PCIe 5.0 graphics cards without adapters. Four additional 6+2 pin PCIe connectors support multi-GPU SLI or CrossFire setups. The platform handles 235 % total power excursion and 300 % GPU power excursion for transient spikes. This unit replaces older supplies that lack the 12V-2x6 interface or sufficient excursion headroom.

How it compares

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

Price $87.99
Cheaper than about 72% of the 10,869 comparable items (median $142.99).
Max wattage 1000 W
Higher than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameRosewill
Product lineCMG
Model nameCMG1000G5
Product typeATX 3.0 Compatible / ATX 3.1 Compatible
Graphics
SLI supportReady
CrossFire supportReady
Ports & slots
PCIe power connectors4 × 6+2-Pin & 1x 12+4-Pin
SATA power connectors8
Output type+3.3 V@25A, +5 V@25A, +5VSB@3A
Power
Max wattage1000 W
Power efficiencyUp to 92%
Modular cablingFull Modular
Power factor correctionActive
Main power connector20+4Pin
12V railsSingle
Power hold-up time16 ms min.
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Overload protectionYes
Size & build
Shipping weight2.85 kg
Package size290 × 229 × 117 mm
Compatibility
PSU length limit140 mm
More details
Fan configuration1 x Silent 120 mm FDB fan

Other versions of this model

2 more in the same range

Questions about this item

Will the 1000 W unit and its 140 mm length fit my mid-tower case?

The power supply is 140 mm long, so it fits most mid-tower cases that accept standard ATX units; measure your case clearance to confirm.

Can I run a modern GPU that needs the 12V-2x6 connector without adapters?

Yes, a native 600 W 12+4-pin 12V-2x6 cable is included for direct PCIe 5.0 graphics card connection.

Does the fan stay on constantly or stop at low load?

ECO mode lets the 120 mm FDB fan switch off at low loads for silent operation.

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