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Corsair RM850x 850W Modular 80+ Gold PSU

CORSAIR RMx Series fully modular power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. With a zero RPM fan mode and ten-year warranty, the RMx Series is an ideal choice for a reliable, quiet PSU.

CCL Code: PSU1947
Manufacturer Code: CP-9020200-UK
| Manufacturer: Corsair

Magnetic Levitation Cooling Meets 80 PLUS Gold Power

Key Features:

  • 4x Molex Connectors
  • 10x SATA Connectors
  • 6x PCIe Connectors (6+2-Pin)
  • 4+4+8-Pin CPU Power Connector
  • ATX Form Factor

Was £158.63

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Delivery Options

Thursday 7th July via Priority DPD

Free Delivery by Tuesday 12th July

Collection Options

Thursday 7th July from Local Collection Point


CORSAIR RMx Series power supplies with EPS12V connectors are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. RMx PSUs use only Japanese 105°C capacitors, for long life and reliability backed by a ten-year warranty. A 135mm magnetic levitation bearing fan ensures high performance coupled with low noise. Wake your computer faster and consume less power with support for Modern Standby sleep mode. Zero RPM mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you need only connect the cables your system requires. An RMx PSU is quiet, efficient and dependable enough to power your high-performance PC for years to come.

Main Features

  • Fully modular, so you only connect the cables that your system needs.
  • A 135mm ML fan utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior reliability.
  • Dual EPS12V connectors for wide compatibility with modern graphics cards and motherboards.
  • 100% Industrial-grade, 105øC rated Japanese capacitors ensure unwavering power and reliability.
  • Supports Modern Standby sleep mode for extremely fast wake-from-sleep times and better low-load efficiency.
  • 80 PLUS Gold certified efficiency for lower power consumption, less noise, and cooler temperatures.
  • Zero RPM fan mode for near-silent operation at low to medium loads.
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power, reduces coil whine for quieter operation, and enables use of more energy efficient sleep states.
  • Ten-year warranty for complete peace of mind.


SATA Connectors 10
CPU Connectors 2 x 4+4-pin EPS
PCI Connectors 6 x 6+2-pin PCIe
Motherboard Connectors 1 x 24-pin ATX
Molex Connectors 4


Standards 80 PLUS Gold Certified


Power 850 W
Power Cord Yes


Form Factor ATX Power Supply
Case Colour Black
In The Box RM850X, safety leaflet, AC cable, DC cable set, mounting screws, cable ties
Width 150 mm
Depth 160 mm
Height 86 mm
Weight 1.7 kg


Warranty 10 Years

Key Features

Modular Cables Modular
80Plus Rated 80 Plus Gold
PSU Form Factor ATX
PCI-E Connectors 6
Motherboard Power Connectors 4 + 4-Pin x 2
PCI-E Pin Type 6+2-Pin
PSU Depth 160 mm

Item Details

Manufacturer Corsair
Manufacturer Code CP-9020200-UK
UPC 840006604808
Condition New

Warranty Information

Warranty 10 Years

Manufacturer Information

Manufacturer Corsair
Manufacturer Code CP-9020200-UK
Questions and Answers

Do you have you a question about the Corsair RMx Series RM850x Power Supply, 850W, ATX, 80 PLUS Gold Certified, Fully Modular?

4.9 / 5 7 reviews


4 weeks ago

Good quality product that was easy to install and use. No issues so far. Power cables can be a bit stiff so if you have some narrow gaps/tight angles in your build consider aftermarket ones.

Diogo Machado

last month

Just what I needed

John Hughes

last month

Excellent power unit, more than enough to power my whole system including a 3080 ti


last month

Silent, powerful and comes with all the cables you could ever need.


last month

CCL kindly upgraded my order with free next day shipping, so very happy with my purchase!


3 months ago

Easy to install and runs very well, nothing to fault really

Scott Suddards

4 months ago

Happy with the product