Corsair RM850e 850W Power Supply
Original price was: £142.79.£135.32Current price is: £135.32.
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About This Item
- 850W ATX 3.1 power supply with 80 PLUS Gold efficiency
- Fully modular cabling for tidy builds
- 12cm rifle bearing fan with silent mode operation
- PCIe 5.1 12V-2×6 GPU cable included
- Compact 140mm depth for easy case fit
- 7-year warranty with CE, RoHS, UKCA certification
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Corsair RM850e | Gold-Certified ATX 3.1 PSU
The Corsair RM850e power supply unit 850 W 24-pin ATX ATX Black delivers reliable, efficient power for modern gaming and workstation PCs. Designed for quiet operation, this ATX 3.1-certified unit supports high-performance components with fully modular cabling for a clean, clutter-free build.
Key Specifications
| Metric | Spec |
|---|---|
| Total Power Output | 850 W |
| Efficiency Rating | 80 PLUS Gold |
| ATX Version | 3.1 |
| Fan Type | Rifle Bearing |
| Cabling | Fully Modular |
Compact ATX 3.1 Design for Modern Builds
The RM850e features a compact 140mm depth, making it ideal for smaller ATX cases without sacrificing performance. Its ATX 3.1 compliance ensures stable power delivery under heavy GPU loads, supporting the latest PCIe 5.1 graphics cards with a dedicated 12V-2×6 GPU connector.
Gold-Certified Efficiency with Low Noise
Cybeneticsâ„¢ Gold certification guarantees up to 90% efficiency, reducing heat and noise during operation. The 120mm rifle bearing fan uses a specially calculated curve to maintain quiet performance even at full load, perfect for users prioritising a silent workspace.
Fully Modular Cabling for Cleaner Builds
With fully modular cables, you connect only what your system needs, improving airflow and simplifying cable management. This PSU includes multiple PCIe connectors and a native 600W GPU cable, future-proofing your build for upcoming hardware upgrades.
Built for Reliability and Longevity
Industrial-grade 105°C capacitors and a resonant LLC topology with DC-DC conversion ensure consistent, clean power. With a Mean Time Between Failures (MTBF) of 100,000 hours and support for Modern Standby, the RM850e offers both durability and fast wake-from-sleep performance.
What Is in the Box
- Corsair RM850e power supply unit
- Fully modular cables (including PCIe and CPU connectors)
- UK 3-pin power cable (Type G)
- Mounting screws
- User manual
Before you order
- Confirm your case supports ATX PSUs up to 140mm deep.
- Verify your GPU requires a 12V-2×6 connector for full compatibility.
- Check if your motherboard needs EPS 4+4 pin CPU power.
- Ensure your power budget matches the 850W capacity for multi-GPU or high-end CPU setups.
Buyer FAQs
Is this PSU compatible with PCIe 5.0 graphics cards?
What type of fan bearing does it use?
Does it support Modern Standby?
What is the warranty period?
Is the PSU fully modular?
Is it worth it?
The Corsair RM850e is an excellent choice for UK PC builders seeking a quiet, efficient, and future-ready power supply. Its ATX 3.1 compliance, Gold efficiency, and fully modular design make it ideal for gaming, content creation, and workstation use. Covered by the applicable manufacturer warranty.
| Silent mode | Yes |
|---|---|
| Purpose | PC |
| ATX version | 3.1 |
| Mean time between failures MTBF | 100000 h |
| Bearing technology | Rifle |
| Product colour | Black |
| Fan diameter | 12 cm |
| On/off switch | Yes |
| Number of fans | 1 fan(s) |
| Illumination | No |
| Fan location | Front |
| Cooling type | Active |
| Total power | 850 W |
| AC input voltage | 100 – 240 V |
| AC input frequency | 47 – 63 Hz |
| Input current | 10 – 5 A |
| Combined power +3.3V | 150 W |
| Combined power +12V | 850 W |
| Combined power +5V | 150 W |
| Combined power +5Vsb | 15 W |
| Max output current +3.3V | 20 A |
| Max output current +12V | 62.5 A |
| Max output current +5V | 20 A |
| Max output current +5Vsb | 3 A |
| Motherboard power connector | 24-pin ATX |
| Number of SATA power connectors | 6 |
| Number of PATA power connectors | 2 |
| PCI Express power connectors 6+2 pin | 2 |
| PCI Express connector | Yes |
| Cabling type | Fully-Modular |
| EPS power connector 4+4 pin | Yes |
| PCI Express power connectors 12+4 pin | 1 |
| Width | 150 mm |
| Depth | 86 mm |
| Height | 140 mm |
| Weight | 2.93 kg |
| Package type | Box |
| Compliance certificates | CE, RoHS, UKCA |
| Warranty period | 7 year(s) |
| Power plug type | Type G |
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