Corsair RMx Series 850W Cybernetics Gold ATX 3.1 PCIe 5.1 Power Supply Black
£135.52 Inc.VAT
In stock
In stock
Features
- 850 W Wattage
- Fully Modular
- 80 Plus Gold
- 24 pin ATX
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- Free Pickup from our Central London Store.
- Standard Delivery (Free): Arrives in 2–3 working days.
- Express Delivery: Arrives in 1–2 working days.
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RMx Series™ RM850x Fully Modular ATX Power Supply from CORSAIR

The Gold Standard of Power SuppliesCORSAIR RMx Series Fully Modular Low-Noise Power Supplies deliver quiet, dependable power with Cybenetics Gold efficiency to your PC. Fully modular, ultra-flexible embossed cables make PC builds easy, as you connect only the cables your system requires. Compliant with the ATX 3.1 power standard from Intel®, RMx PSUs have the connections needed to power today’s demanding PC hardware including a native 12V-2×6 connector. 100% Japanese 105°C-rated electrolytic capacitors deliver fantastic electrical performance, while a 140mm FDB fan provides low noise cooling. Backed by a ten-year warranty, RMx PSUs are the gold standard for many years to come.
850Watts
70.8Amps
ATX 3.1Form Factor
Quiet, Dependable Efficient

CORSAIR’s 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. Built with 100% Industrial-grade, 105°C-rated Japanese electrolytic capacitors for unwavering power and reliability. With 50°C continuous operating temperature ensures reliable power for your PC, even under high-stress conditions.
Cybenetics Gold PSU Rating

Gold Quality CertifiedHigh efficiency operation for lower power consumption, less noise, and cooler temperatures.
Engage Manual Controls

Manual fan override knobWant 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 CORSAIR’s manual fan override knob, increasing fan speed and airflow.
Clean Cabling, Every Time

Fully Modular ConnectorsConnect only what you need using sleek embossed cables with low-profile combs to make installations a breeze.
Native 12V-2×6 GPU cable included for use with modern graphics cards such as the NVIDIA® GeForce RTX™ 40 Series.
The Strong, Silent Type

140mm low-noise fanA 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.
Broadly Compatible

ATX 3.1 CertifiedBe 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.
| Form Factor | ATX 3.1 |
| Edition | RM850x |
| Wattage | 850 W |
| Energy Efficiency Certification | Cybenetics Gold |
| Max. Efficiency (at 230Vac) | 91 % |
| Cooling | Fan |
| Fans | 1 x 140mm |
| Internal +12V Rails | Single Rail |
| Rail 1 +12V | 70.8 A |
| Rail 2 +12V | N/A |
| Rail 3 +12V | N/A |
| Rail 4 +12V | N/A |
| Rail 5 +12V | N/A |
| Rail 6 +12V | N/A |
| Max. Combined Output +12V | 70.8 A |
| Modular | Yes |
| Modularity | Full Modular |
| SLI/CrossFire | Yes |
| EPS 12V | Yes |
| Motherboard Connector | 24-pin |
| Connectors |
|
| Dimensions | 150 x 86 x 160 (WxHxD) |
| Package Type | Retail |
| Warranty | 10 Year |
| Additional Information | |
|---|---|
| Model Number | CP-9020270-UK |
| GTIN | 840006667544 |
| Weight | 3.3 kg |
|---|---|
| Manufacturer | CORSAIR |
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Description
RMx Series™ RM850x Fully Modular ATX Power Supply from CORSAIR

The Gold Standard of Power SuppliesCORSAIR RMx Series Fully Modular Low-Noise Power Supplies deliver quiet, dependable power with Cybenetics Gold efficiency to your PC. Fully modular, ultra-flexible embossed cables make PC builds easy, as you connect only the cables your system requires. Compliant with the ATX 3.1 power standard from Intel®, RMx PSUs have the connections needed to power today’s demanding PC hardware including a native 12V-2×6 connector. 100% Japanese 105°C-rated electrolytic capacitors deliver fantastic electrical performance, while a 140mm FDB fan provides low noise cooling. Backed by a ten-year warranty, RMx PSUs are the gold standard for many years to come.
850Watts
70.8Amps
ATX 3.1Form Factor
Quiet, Dependable Efficient

CORSAIR’s 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. Built with 100% Industrial-grade, 105°C-rated Japanese electrolytic capacitors for unwavering power and reliability. With 50°C continuous operating temperature ensures reliable power for your PC, even under high-stress conditions.
Cybenetics Gold PSU Rating

Gold Quality CertifiedHigh efficiency operation for lower power consumption, less noise, and cooler temperatures.
Engage Manual Controls

Manual fan override knobWant 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 CORSAIR’s manual fan override knob, increasing fan speed and airflow.
Clean Cabling, Every Time

Fully Modular ConnectorsConnect only what you need using sleek embossed cables with low-profile combs to make installations a breeze.
Native 12V-2×6 GPU cable included for use with modern graphics cards such as the NVIDIA® GeForce RTX™ 40 Series.
The Strong, Silent Type

140mm low-noise fanA 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.
Broadly Compatible

ATX 3.1 CertifiedBe 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.
| Form Factor | ATX 3.1 |
| Edition | RM850x |
| Wattage | 850 W |
| Energy Efficiency Certification | Cybenetics Gold |
| Max. Efficiency (at 230Vac) | 91 % |
| Cooling | Fan |
| Fans | 1 x 140mm |
| Internal +12V Rails | Single Rail |
| Rail 1 +12V | 70.8 A |
| Rail 2 +12V | N/A |
| Rail 3 +12V | N/A |
| Rail 4 +12V | N/A |
| Rail 5 +12V | N/A |
| Rail 6 +12V | N/A |
| Max. Combined Output +12V | 70.8 A |
| Modular | Yes |
| Modularity | Full Modular |
| SLI/CrossFire | Yes |
| EPS 12V | Yes |
| Motherboard Connector | 24-pin |
| Connectors |
|
| Dimensions | 150 x 86 x 160 (WxHxD) |
| Package Type | Retail |
| Warranty | 10 Year |
| Additional Information | |
|---|---|
| Model Number | CP-9020270-UK |
| GTIN | 840006667544 |
Specifications
Warranty
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