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Corsair RM Series RM850 850W Modular 80+ Gold PSU

CORSAIR RM Series fully modular power supplies with triple 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 RM Series is an ideal choice for a reliable, quiet PSU.

CCL Code: PSU1983
Manufacturer Code: CP-9020235-UK
| Manufacturer: Corsair

Gold-Certified Quiet Power

Key Features:

  • 4x Molex Connectors
  • 14x SATA Connectors
  • 4x PCIe Connectors (6+2-Pin)
  • 8+8+8-Pin CPU Power Connector
  • ATX Form Factor


inc VAT

20+ In Stock Now

Buying in bulk or need help? Email our Business Team.

Delivery Options

Tomorrow via DPD Sunday

Free Delivery by Tuesday 31st May

Order within

Collection Options

Monday 30th May from Local Collection Point



CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies deliver consistent 80 PLUS Gold efficient power to your PC. With triple EPS12V cables and four PCIe 8-pin power connectors, RM PSUs have all the connections needed to power today’s most demanding PC upgrades. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance and reliability, backed by a ten-year warranty. Wake your computer faster and consume less power with support for the Modern Standby sleep mode. Zero RPM fan mode ensures virtually silent operation at low and medium loads. Fully modular cables make PC builds and upgrades easy, as you connect only the cables your system requires. RM PSUs are quiet, efficient, and dependable to power your high-performance PC for years to come.

Main Features

  • Fully modular, so you only connect the cables your system needs.
  • Triple EPS12V connectors for full compatibility with modern graphics cards and motherboards.
  • A 140mm rifle bearing fan with a specially calculated fan curve ensures that fan noise is kept to a minimum, even at full load.
  • Zero RPM fan mode for near-silent operation at low to medium loads.
  • Industrial-grade, 105 degrees C-rated capacitors deliver solid electrical performance and reliability.
  • 80 PLUS Gold certified high efficiency operation for lower power consumption, less noise, and cooler temperatures.
  • Supports Modern Standby sleep mode for extremely fast wake-from-sleep times and better low-load efficiency.
  • 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 14
CPU Connectors 3 x 4+4-pin EPS
PCI Connectors 4 x 6+2-pin PCIe
Motherboard Connectors 1 x 24-pin ATX
Molex Connectors 4


Standards 80 PLUS Gold Certified


Voltage 100 ~ 240 V
Power 850 W
Frequency Range 47 ~ 63 Hz


Form Factor ATX Power Supply
Case Colour Black
In The Box Power Supply
Modular Cables
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 4
Motherboard Power Connectors 8 + 8 + 8-Pin
PCI-E Pin Type 6+2-Pin
PSU Depth 160 mm

Item Details

Manufacturer Corsair
Manufacturer Code CP-9020235-UK
EAN 0840006631187
UPC 840006631187
Condition New

Warranty Information

Warranty 10 Years

Manufacturer Information

Manufacturer Corsair
Manufacturer Code CP-9020235-UK
Questions and Answers

Do you have you a question about the Corsair RM Series RM850 Power Supply, 850W, ATX, 80 PLUS Gold Certified, Fully Modular, Black?

Q: Hi. What is meant by "Gold-Certified Quiet Power"? thanks
Answer by Website User on 19th May 2022
That's just Corsair's marketing description: Full details are available here:
0 customers found this answer helpful.
Post Answer
4.8 / 5 12 reviews

Mr. John Suller

4 days ago

Nice PSU, not as premium as my previous EVGA model but good value for money and a step up in power.Bought as a deal with CPU so the price was great.


last week

Quiet under all conditions. Well done.

Mr Damant

last week

Brilliant and if its overpowered for the system essentially runs silently

Francesco Battista

3 weeks ago

Top and cheap

Mark Mcfarlane

last month

Ideal for job cable management also good


last month

Doe's what it's supposed to do


3 months ago

Good power supply


3 months ago

Works well, no issues encountered so far.

Filis james

3 months ago

Full, delivered on time


3 months ago

Very good, never makes sound due to its 0 RPM fan mode. Got this to replace my 600W PSU but it was actually an unnecessary upgrade that I slightly regret, so be sure to double check whether you need such power. Anyway, quality and price for the power is one of the best, plus it's a very recent product refresh.


4 months ago

best value modular power supply you can get in my opinion, comfortably powering my 12700k and 3080ti, corsair even offer a dedicated 12pin psu cable (extra on website) which cleans up the build and of course plugs straight in. psu is pretty much silent and stays cool, always ran corsair psus and glad I chose this one.


5 months ago

very quiet just just want i want it to do ........super fast delivery