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White ATX power supply unit with 140 mm fan and fully modular cables

Corsair

Corsair CP-9020232-NA RM850 850W 80 Plus Gold fully modular power supply

SKU CH-28QD-QCHVX MPN CP-9020232-NA

An 850 W fully modular ATX power supply with 80 PLUS Gold efficiency and a 140 mm rifle bearing fan

  • Max wattage850 W
  • Modular cablingFull Modular
  • Fan configuration1
  • PSU length limit160 mm
  • Efficiency certification80 PLUS GOLD Certified
  • Product typeATX
  • 850 W output powers demanding builds
  • 80 PLUS Gold certification cuts energy waste and heat
  • Fully modular cables reduce clutter for better airflow
  • 140 mm rifle-bearing fan with zero-RPM mode keeps noise low at light loads
  • Compact 160 mm depth fits most ATX cases

What this power supply is and who it is for

The Corsair RM850 is an ATX power supply rated at 850 W with full modular cabling. It targets system builders who want clean cable routing and quiet operation in a modern desktop build. The 2021 series design includes a white finish option for colour-coordinated interiors.

The specification that decides fit

The unit carries 80 Plus Gold certification and reaches upwards of 90 percent peak efficiency, reducing waste heat and fan speed. A 140 mm rifle bearing fan runs a tailored curve and stops completely under low and medium loads for near-silent idle. Maximum depth is 160 mm, so the chassis must accommodate that length.

Who this suits and who should look elsewhere

This PSU suits builders who need multiple EPS12V connectors for high-end motherboards and GPUs, including compatibility with the Corsair 12-pin GPU power cable. It is not for systems that require a shorter unit than 160 mm or for users who need a non-modular design to save cost.

How it compares

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

Price $277.99
Pricier than about 75% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameCORSAIR
Product lineRM850
Model nameCP-9020232-NA
Product typeATX
Power
Max wattage850 W
Modular cablingFull Modular
Efficiency certification80 PLUS GOLD Certified
Compatibility
PSU length limit160 mm
More details
Fan configuration1

Questions about this item

What does the 850 W maximum power actually deliver in a built system?

The unit can supply up to 850 W of continuous power to the components, with peak efficiency above 90 % so less energy becomes heat and the 140 mm rifle bearing fan stays quiet even under heavy load.

How does the 80 PLUS Gold certification limit real-world performance?

It guarantees at least 80 % efficiency at typical loads and upwards of 90 % at peak, meaning lower electricity draw, less waste heat and quieter operation without any software configuration.

Will the 160 mm length and ATX form factor fit my case and mounting points?

The supply measures 160 mm long in the standard ATX layout, so it fits any case designed for ATX units and uses the usual four-screw mounting pattern.

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