Corsair RM850e 850W Power Supply

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

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

Cybenetics™ 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.

Box Contents

• Corsair RM850e power supply unit
• Fully modular cables (including PCIe and CPU connectors)
• UK 3-pin power cable (Type G)
• Mounting screws
• User manual

Check before you buy

• 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.

Frequently Asked Questions

Q: Is this PSU compatible with PCIe 5.0 graphics cards?

A: Yes, it includes a native 12V-2×6 GPU cable for PCIe 5.1 compliance and modern high-power GPUs.

Q: What type of fan bearing does it use?

A: It uses a rifle bearing fan designed for quiet, long-lasting operation.

Q: Does it support Modern Standby?

A: Yes, it supports Modern Standby for faster wake-from-sleep and improved low-load efficiency.

Q: What is the warranty period?

A: It comes with a 7-year manufacturer warranty.

Q: Is the PSU fully modular?

A: Yes, all cables are fully modular for easier installation and better airflow.

The Consultant’s Verdict & Warranty

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 standard Manufacturer Warranty.