% £-148.95
Corsair 850W Enthusiast RMx Series RM850X V3 PSU, FDB Fan, Fully Modular, 80+ Gold, ATX 3.1, PCIe 5.1
Corsair 850W Enthusiast RMx Series RM850X V3 PSU, FDB Fan, Fully Modular, 80+ Gold, ATX 3.1, PCIe 5.1
Corsair 850W Enthusiast RMx Series RM850X V3 PSU, FDB Fan, Fully Modular, 80+ Gold, ATX 3.1, PCIe 5.1
Corsair 850W Enthusiast RMx Series RM850X V3 PSU, FDB Fan, Fully Modular, 80+ Gold, ATX 3.1, PCIe 5.1
CORSAIR

Corsair 850W Enthusiast RMx Series RM850X V3 PSU, FDB Fan, Fully Modular, 80+ Gold, ATX 3.1, PCIe 5.1

Product SKU: PSU-850CORRMXV3
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£148.95
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CORSAIR RMx Series RM850x ATX Power Supply – Fully Modular – ATX 3.1 – PCIe 5.1 – Cybenetics Gold – Low-Noise – Japanese Capacitors – 850 Watts – Ten-Year Warranty

  • Fully Modular: Reliable and efficient low-noise power supply with fully modular cabling, so you only have to connect the cables your system needs.
  • Cybenetics Gold-Certified: Rated for up to 91% efficiency, resulting in lower power consumption, less noise, and cooler temperatures.
  • ATX 3.1 Compliant: Compliant with the ATX 3.1 power standard from Intel, supporting PCIe 5.1 and resisting transient power spikes.
  • Native 12V-2x6 Connector: Ensures compatibility with the latest graphics cards with a direct GPU to PSU connection - no adapter necessary.
  • Embossed Cables with Low-Profile Combs: Sleek, ultra-flexible embossed cables look great and make installing and connecting the RMx a breeze.
  • Low Noise with 140mm Fan: A 140mm FDB fan with a specially calculated fan curve ensures low-noise operation even at full load, with a fan speed adjustment knob on the back for quick manual control.
  • 100% Japanese Electrolytic Capacitors: Delivers steady, reliable power and dependable electrical performance with 105°C-rated Japanese capacitors.
  • 50°C Maximum Operating Temperature: For reliable power even under high-stress conditions.
  • Zero RPM Fan Mode: For near-silent operation at lower loads.
  • Ten-Year Warranty: Your guarantee of reliable operation for peace of mind through multiple builds.

 

 

 

Quiet, Dependable, Efficient
 
Our best-selling PSU, updated. This fully modular, low noise, Cybenetics Gold-certified power supply is ATX 3.1 compliant and ideal for delivering dependable power to today's top-performing PCs.
 
 
 
 
 
50°C Continuous Operating Temperature
 
Ensures reliable power for your PC, even under high-stress conditions.
 
 
 

 
105°C-Rated Capacitors
 
Built with 100% Industrial-grade, 105°C-rated Japanese electrolytic capacitors for unwavering power and reliability.
 
 

 
 
ATX 3.1 Certified
 
Be confident your PSU supports the latest sleep and hibernate modes and modern CPU and GPU requirements. ATX 3.1 compliance ensures full compatibility with modern components and power states.
 
 

 
 
Fully Modular Connectors
 
Connect only what you need using sleek embossed cables with low-profile combs to make installations a breeze.
 
 

 
 
140mm Low-Noise Fan
 
A fluid dynamic bearing fan with magnetic dome structure keeps noise to a minimum, with Zero RPM mode to eliminate fan noise completely at low to medium loads.
 


 
 
Manual Fan Override Knob
 
Want to get more air through the PSU or to exhaust some heat from your case? You can override the Zero RPM Mode and low-noise profile of the RMx Series with our manual fan override knob, increasing fan speed and airflow.
 

 
 
 
Ten-Year Warranty
 
World-class support
Our award-winning service means you can enjoy your gear worry-free.
 

 

 

Description

Specification

  • Form Factor: ATX
  • Series: Corsair Enthusiast RMx
  • Wattage: 850 W
  • Modular: Fully Modular
  • Compatibility: ATX12V v3.1
    EPS12V v2.92
    PCIe 5.1
  • #Hide#Wattage Range: 800 - 860W
  • Connectors: 1 x Modular ATX Cable (24-pin)
    2 x EPS / ATX 12V 8-pin (4+4)
    1 x PCIe 12V-2x6-pin (12+4)
    3 x PCIe 8-pin (6+2)
    8 x SATA
    3 x PATA
  • AC Input: 100 - 240V
  • Fan Type: 140mm Low-Noise Fan
    Fluid Dynamic Bearing Fan with Magnetic Dome Structure
    Zero RPM mode
  • Fan Bearing: Fluid / Hydraulic Bearing
  • Max Certification: Gold
  • Efficiency: Cybenetics Gold
    Upwards of 91% peak efficiency
  • MTBF: "100,000 hours"
  • Additional Features: See Overview
  • Package Contents: RM850x Power Supply
    DC Cable Kit
    Power Cord
    Mounting Screws
    Cable Ties
  • Weight/Dimensions: 1.77 kg
    160 x 86 x 150 mm
  • Package Weight: 3.9680 kg
  • Warranty: 10 Years
  • #Hide#ATX 3.1/3.0: ATX 3.1

Delivery & Shipping Policy

Last updated: 19/09/2025

At Tech Direct UK, we aim to get your order to you as quickly and efficiently as possible. Please see below for our delivery terms.

1. Delivery Options & Costs

  • Free Delivery – Orders over £50 qualify for free UK standard delivery.

  • Standard Delivery – Orders under £50 are charged at £4.99.

2. Delivery Times

  • Next Day Delivery – The majority of items are shipped via next day courier if ordered before 2:00pm (Monday–Friday).

  • Orders placed after 2:00pm, on weekends, or bank holidays will be processed the next working day.

  • Larger or Heavy Items – Certain products (e.g., heavy furniture, oversized goods) may take 2–5 working days for delivery. Estimated times will be displayed at checkout.

3. Delivery Areas

  • We deliver to all mainland UK addresses.

  • Deliveries to remote areas (e.g., Highlands, Islands, Northern Ireland) may take longer or incur additional charges — these will be shown at checkout before confirming your order.

4. Tracking Your Order

  • Once dispatched, you will receive an email confirmation with tracking details (where available).

  • You can track your delivery via the courier’s website.

5. Missed Deliveries

  • If you are not available at the time of delivery, the courier will leave a card or attempt redelivery.

  • Repeated failed delivery attempts may result in the parcel being returned to us. In this case, re-delivery charges may apply.

6. Risk of Loss

  • Risk of loss or damage to the goods passes to you once they are delivered.

  • Please inspect your order upon receipt and notify us of any issues within 48 hours.

7. Contact Us

If you have any questions about delivery, please contact us:
📧 Email: support@techdirectuk.com

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