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Rectangular black metal PSU with mesh front and modular cable sockets visible

Rosewill

Rosewill CMG850 850 W ATX 3.0/3.1 80+ Gold full modular power supply

SKU CH-RDGV-FBTX6 MPN CMG850

An 850 W ATX 3.0 and 3.1 compatible unit with 80 PLUS Gold efficiency, a single 12 V rail, full modular cables and a 120 mm FDB fan in a 140 mm chassis

  • TypeATX 3.0 Compatible / ATX 3.1 Compatible
  • Maximum Power850 W
  • Fans1 x Silent 120mm FDB fan
  • PFCActive
  • Main Connector20+4Pin
  • +12V RailsSingle
  • 850 W single 12 V rail powers demanding builds
  • ATX 3.0 and 3.1 compatible for modern GPUs
  • Full modular cabling reduces clutter inside the case
  • 120 mm FDB fan runs quiet under load
  • 80 PLUS Gold certification delivers up to 92 % efficiency

850 W ATX 3.0/3.1 power supply

The Rosewill CMG850 delivers up to 850 W through a single +12 V rail. It carries 80 PLUS Gold certification with up to 92 % efficiency. The fully modular design lets builders connect only the cables their system needs. It targets desktop builders who want a compact, high-efficiency unit for modern graphics cards and multi-drive configurations.

ATX 3.0 and 3.1 compatibility

This unit meets both ATX 3.0 and ATX 3.1 specifications for transient response and power-excursion handling. A single strong 12 V rail simplifies load balancing across high-end GPUs. The 140 mm length fits many smaller cases where longer units would not. Hold-up time is rated at 16 ms minimum and power-good signal at 1-100 ms.

Four PCIe connectors and nine SATA ports

Four 6+2-pin PCIe connectors support multi-GPU SLI or CrossFire setups. Nine SATA power connectors provide ample drive capacity for storage-heavy builds. Two 4+4-pin EPS connectors feed modern motherboards. The 120 mm FDB fan runs silently while the 100-240 V active PFC input handles global mains without a switch.

Points forts

  • 850 W single 12 V rail powers demanding builds
  • ATX 3.0 and 3.1 compatible for modern GPUs
  • Full modular cabling reduces clutter inside the case
  • 120 mm FDB fan runs quiet under load
  • 80 PLUS Gold certification delivers up to 92 % efficiency

Caractéristiques

BrandRosewill
ModelCMG850
TypeATX 3.0 Compatible / ATX 3.1 Compatible
Maximum Power850 W
Fans1 x Silent 120mm FDB fan
PFCActive
Main Connector20+4Pin
+12V RailsSingle
PCI-Express Connector4 x 6+2-Pin
SATA Power Connector9
SLISLI Ready
CrossFireCrossFire Ready
Max PSU Length140 mm
ModularFull Modular
Power Good Signal1-100ms
Hold-up Time16ms min.
EfficiencyUp to 92%
Energy-Efficient80 PLUS GOLD Certified
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Output+3.3V@18A, +5V@18A, [email protected] , [email protected] , [email protected]
MTBF>100,000 Hours
ApprovalscTUVus, FCC certified
Connectors1 x 20+4-Pin Main Connector
2 x 4+4-Pin ATX12V / EPS12V Connector
4 x 6+2-Pin PCI-E Connector
9 x SATA Connector
4 x 4-Pin Peripheral Connector
Features80 PLUS GOLD Certified
Compact 140mm size
850 Watts Max Power
Single strong 12V rail - ideal for Gaming system
SLI & CrossFire ready - 2 x 6+2-Pin Connector
1 x Silent 120mm FDB Fan
Active-PFC with auto AC-input voltage adjustment (100 - 240V)
Over Temperature Protection / Over Current Protection / Over Voltage Protection / Power Protection, Under Voltage Protection, and Short Circuit Protection provide maximum safety to your critical system components
Safety & EMI Approval: cTUVus, FCC
Dimensions3.39" x 5.91" x 5.51"
Poids d’expédition2.84 kg
Dimensions du colis290 × 226 × 117 mm

Questions sur cet article

What does the 850 W rating mean once the unit is installed in a PC?

The single 12 V rail can deliver the full 850 W to graphics cards and CPU, so high-end gaming builds draw their peak power without rail balancing limits.

What does ATX 3.0 / 3.1 compatibility cap in practice?

The platform supports the 12 VHPWR power-excursion and timing requirements defined by ATX 3.0 and 3.1, allowing modern GPUs to trigger transient spikes within the spec window.

What clearance does the 140 mm length need in a case?

The chassis must provide at least 140 mm of depth from the PSU mounting face to any drive cage or cable routing barrier for the unit to fit.

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