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Rectangular black metal power supply unit with large ventilation grilles and a 120mm fan visible on one side

Rosewill Open box

Rosewill VMG1000 1000W ATX 3.1 80+ Gold 5 Year Warranty power supply

SKU CH-GJM0-AQ16E MPN VMG1000

A compact 1000 W ATX 3.1 unit with 80 PLUS Gold efficiency, full modular cables and a native 12V-2x6 connector for modern GPUs

  • Max wattage1000 W
  • Power efficiencyUp to 85%
  • Modular cablingFull Modular
  • Fan configuration1 × 120 mm FDBfan
  • Power factor correctionActive
  • Main power connector20+4Pin
  • 1000 W output supports demanding builds with a single +12V rail
  • 80 PLUS Gold certification delivers up to 85 % efficiency under load
  • Full modular design uses only the cables your system needs
  • 120 mm FDB fan and vented steel shell keep temperatures low
  • Native 12V-2x6 connector provides 600 W to modern graphics cards

1000W ATX 3.1 Gold power supply

The Rosewill VMG1000 delivers 1000 W from a fully modular ATX 3.1 design. It targets builders who need native 12V-2x6 support for modern graphics cards. The 140 mm depth fits compact chassis where longer units cannot. Buyers who want more storage connectors than the eight SATA ports provided should look elsewhere.

Single 12 V rail with 12V-2x6 connector

A single +12 V rail supplies the full 1000 W through one native 12+4-pin 12V-2x6 cable rated for 600 W. Three 6+2-pin PCIe cables handle additional GPUs or peripherals. The 16 ms hold-up time meets ATX 3.1 excursion requirements of 235 % total and 300 % GPU peaks. Systems that require multiple 12V-2x6 cables cannot use this unit.

Full modular cables and six-protection suite

Every cable detaches, leaving only the 20+4-pin, two 4+4-pin EPS, three PCIe, one 12V-2x6, eight SATA and four peripheral leads you actually need. Japanese capacitors and a 120 mm FDB fan keep ripple low and noise down. The OCP, OPP, OTP, OVP, SCP and UCP protections shut the unit down before components suffer damage. No software suite or RGB lighting is included.

How it compares

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

Price $81.99
Cheaper than about 75% 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
Model nameVMG1000
Product typeATX 3.1 Compatible
Graphics
CrossFire supportReady
Ports & slots
SATA power connectors6
Output type+3.3 V@18A, +5 V@18A, +5VSB@3A
Power
Max wattage1000 W
Power efficiencyUp to 85%
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 weight2.52 kg
Package size273 × 203 × 114 mm
Compatibility
PSU length limit140 mm
More details
Fan configuration1 × 120 mm FDBfan

Questions about this item

What does the 1000 W maximum power rating mean for my build?

The 1000 W rating is the maximum continuous power the supply can deliver to all components combined, with a single +12 V rail providing the bulk of that capacity for modern CPUs and GPUs

How does the ATX 3.1 and 12V-2x6 connector affect what graphics cards I can run?

The native 12+4-pin 12V-2x6 cable supports up to 600 W for PCIe 5.1 graphics cards, and the unit is rated for 300 % GPU power excursion to handle transient spikes

Will the 140 mm length fit in my compact case?

At 140 mm long the chassis is 35 % smaller than typical ATX units, making it suitable for many small-form-factor builds while still providing full modular cabling

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