Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 2
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 3
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 4
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 5
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 6
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 7
Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W, photo 8
Corsair

Corsair RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W

SKU HC-502394MPN CP-9020270-EU

  • 850 W
  • 80 Plus Gold
  • ATX

Highlights

  • 850W continuous power with ATX 3.1 and PCIe 5.1 support
  • 80 PLUS Gold and Cybenetics Gold efficiency certifications
  • Fully modular design with included 12V-2x6 (12+4 pin) GPU cable
  • 140mm FDB fan with Zero-RPM mode and manual override button
  • 105°C Japanese capacitors for long-term reliability
  • 10-year manufacturer warranty

Key specs

Wattage
850 W
Efficiency
80 Plus Gold
Fully modular
Yes
Form factor
ATX
Fan Size
140 mm
Power Output +12V rails
849.6 W
All specifications
$119.99
  • ≈ 0.001555 BTC
  • ≈ 0.0524 ETH
  • ≈ 120.11 USDT

In stock Ships by Tue, Nov 10 when paid today.

  • Delivery to the United States: $39.90 DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today
  • Rate locked at checkout Up to 60 min to send BTC, 30 min for ETH and USDT
  • New, sealed and genuine Manufacturer warranty: 10 years
  • 30-day returns Unused items in original packaging
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Overview

A fully modular 850W ATX 3.1 power supply with dual Gold efficiency ratings and a 12V-2x6 cable for modern GPUs. Built with Japanese capacitors and a 10-year warranty.

Design and Build Quality

The unit features a black chassis measuring 160 x 150 x 86 mm and weighs 3.28 kg. A 140 mm fluid dynamic bearing fan handles cooling. All cables are detachable for clean installation. Internal components include 105°C rated Japanese capacitors.

Performance and Efficiency

Delivers 850W total output with 849.6W available on the +12V rail at 70.8A. Holds both 80 PLUS Gold and Cybenetics Gold certifications. The +3.3V and +5V rails combine for 150W maximum. Meets ATX 3.1 and PCIe 5.1 standards for modern hardware.

Cooling and Acoustics

Zero-RPM mode stops the fan entirely at low loads for silent operation. A physical button on the rear allows manual override to increase fan speed and airflow when needed. The 140 mm FDB fan balances airflow with low noise during active cooling.

Connectivity and Included Cables

Provides one 24-pin ATX, two 8-pin EPS (4+4), three 8-pin PCIe (6+2), one 12VHPWR (12+4 pin), eight SATA, and three Molex connectors. Cable lengths range from 610 mm for the ATX cable to 850 mm for SATA chains. The 12VHPWR cable measures 650 mm.

RMx Series RM850x Power Supply 80 PLUS Gold ATX 3.1 PCIe 5.1 850W specifications

General
BrandCorsair
Manufacturer part no.CP-9020270-EU
EAN0840006667445
Warranty10 years (manufacturer)
Fan Specifications
Fan Size140 mm
Power Supply
PSU FormatATX
Modular Power SupplyYes
Power Specifications
Total Power Output850 W
Power Output +12V rails849.6 W
Cooling
Semi Passive Power SupplyNo
Internal Ports
CPU Power Connectors 12V ATX/EPS2
8 Pin PCIe Power Connectors3
6+2 Pin PCIe Power Connectors3
SATA Power Connectors8
Efficiency Class
80PLUS Efficiency80 PLUS Gold
Lighting
Lighting / RGBNo
Color
Primary ColorBlack
Dimensions
Length / Depth160 mm
Width150 mm
Height86 mm

Specifications come from the manufacturer and can change without notice. Check the box contents and compatibility before ordering; our team answers questions within one business day.

Shipping & returns

Delivery to the United States: $39.90DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today

Ships from our warehouse in Germany: in stock, it leaves within 1–2 business days, tracked to the door.
ToBusiness daysThis item
GermanyDHL Paket1–2$5.90
Other EU countriesDHL Parcel International2–8$11.90–$15.90
UK, Switzerland and NorwayDHL Parcel International3–7$24.90
United States and CanadaDHL Express Worldwide2–5$39.90
Asia and the Middle EastDHL Express Worldwide2–5$49.90
Australia and New ZealandDHL Express Worldwide3–6$59.90
  • Discreet packaging Plain, unbranded box — no crypto or brand references outside
  • Returns 30 days for unused items in original packaging; faulty items are on us
Rates and delivery times by country

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