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Rectangular black metal PSU with perforated side vents and a 120mm fan grille, modular cable sockets on the front face

Rosewill

Rosewill VMG850 850W ATX 3.1 power supply

SKU CH-8JA5-S3058 MPN VMG850

Full-modular ATX 3.1 unit delivers 850 W through a 120 mm FDB fan and native 12V-2x6 connector

  • TypeATX 3.1 Compatible
  • Maximum Power850 W
  • Fans1 x 120mm FDBfan
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle
  • ATX 3.0 and 3.1 ready for modern platforms
  • 80 PLUS Gold certified efficiency up to 85 percent
  • Full modular cabling with native 12V-2x6 PCIe 5.1 connector
  • Compact 140 mm depth fits small form factor builds
  • 120 mm FDB fan with steel vented shell for quiet cooling

Compact 850W ATX 3.1 unit

The Rosewill VMG850 is an 850W ATX 3.1 compatible power supply built in a 140 mm deep chassis. Its fully modular design and 120 mm FDB fan suit builders fitting a high-wattage unit into restricted space. The single +12V rail and 80 PLUS Gold certification target systems that need steady, efficient delivery.

Native 12V-2x6 cable and modular set

A dedicated 12+4-pin 12V-2x6 connector ships attached to a native PCIe 5.1 cable, removing adapters for new graphics cards. Three 6+2-pin PCI-E leads, two 4+4-pin EPS cables, eight SATA connectors and four peripheral plugs cover storage and CPU power without surplus cables crowding the case.

Excursion headroom and hold-up limits

The platform allows up to 235% total power excursion and 300% GPU power excursion for short bursts, while minimum hold-up time sits at 16 ms. Efficiency peaks at 85% under typical load, so sustained draws near the 850 W rating will generate more heat than lower-load scenarios.

Pluspunten

  • ATX 3.0 and 3.1 ready for modern platforms
  • 80 PLUS Gold certified efficiency up to 85 percent
  • Full modular cabling with native 12V-2x6 PCIe 5.1 connector
  • Compact 140 mm depth fits small form factor builds
  • 120 mm FDB fan with steel vented shell for quiet cooling

Specificaties

BrandRosewill
ModelVMG850
TypeATX 3.1 Compatible
Maximum Power850 W
Fans1 x 120mm FDBfan
PFCActive
Main Connector20+4Pin
+12V RailsSingle
SATA Power Connector6
CrossFireCrossFire Ready
Max PSU Length140 mm
ModularFull Modular
Hold-up Time16ms min.
EfficiencyUp to 85%
Energy-Efficient80 PLUS GOLD Certified
Over Voltage ProtectionYes
Overload ProtectionYes
Output+3.3V@18A, +5V@18A, [email protected] , [email protected] , +5VSB@3A
Connectors1 x 20+4-Pin Main Connector
2 x 4+4-Pin ATX12V / EPS12V Connector
3 x 6+2-Pin PCI-E Connector
1 x 12+4-Pin 12V-2x6 Connector
8 x 15-Pin SATA Connector
4 x 4-Pin Peripheral Connector
Verzendgewicht2.45 kg
Pakketafmetingen273 × 203 × 114 mm

Vragen over dit artikel

Will the 120mm FDB fan need replacement after years of continuous operation?

The fluid-dynamic-bearing fan is rated for long service life; no user-serviceable parts are inside, so replacement would require a full unit swap if the bearing ever wears out.

What thermal limit appears first when the 850W output is sustained for hours?

The 120mm FDB fan ramps up to move heat through the large vents; the over-temperature protection will trip before any component exceeds its safe operating point.

How loud is the 120mm FDB fan and how much heat does the unit exhaust when running all day at typical load?

The fan runs quietly at low loads and increases speed only as needed; the steel shell and large vents dissipate heat efficiently so case temperatures stay manageable during extended use.

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