Corsair RM850e 850W ATX Power Supply

Corsair RM850e | 850W ATX 3.1 Gold Modular PSU

The Corsair RM850e power supply unit 850 W 20+4 pin ATX ATX White delivers reliable, high-efficiency power for modern gaming and enthusiast PCs. With ATX 3.1 certification and fully modular cabling, it supports next-gen GPUs and CPUs without cable clutter. Its 80 PLUS Gold rating ensures up to 90% efficiency, while the 120mm rifle bearing fan keeps noise low even under heavy load.

Key Specifications

ATX 3.1 Ready for Next-Gen Hardware

The RM850e meets the ATX 3.1 standard, designed to handle the higher power demands of modern GPUs and CPUs. This certification ensures stable power delivery during sudden load changes, protecting your components from voltage drops or instability.

Fully Modular for Clean Builds

With fully modular cabling, you connect only the cables your system needs. This reduces clutter inside your case, improves airflow, and makes installation and upgrades easier. The included PCIe 5.1 12V-2×6 cable supports the latest high-power GPUs with a secure dual-colour connector.

Gold Certified Efficiency & Low Noise

Cybenetics Gold certification means the RM850e operates at up to 90% efficiency under typical loads. This translates to less wasted energy, lower heat output, and reduced noise. The 120mm rifle bearing fan runs quietly thanks to a calculated fan curve that only spins faster when necessary.

Compact Design Fits Modern Cases

Measuring just 140mm in depth, the RM850e fits easily into most ATX cases, even compact mid-tower builds. Its white finish and clean design complement modern aesthetics while delivering enterprise-grade reliability.

Box Contents

• Corsair RM850e 850W power supply unit
• Modular cables (as per configuration)
• Mounting screws
• User manual

Check Before You Buy

• Confirm your case has at least 140mm depth clearance.
• Verify your GPU requires PCIe 5.1 or 8-pin connectors (included).
• Ensure your system’s total power draw stays under 850W.
• Check for a UK plug if purchasing from outside the UK.

Common questions

Buying advice

The Corsair RM850e is ideal for gamers and PC builders seeking a reliable, efficient, and future-proof power supply. Its ATX 3.1 certification, Gold efficiency, and fully modular design make it a strong choice for systems with high-end GPUs or multi-GPU setups. Covered by the applicable manufacturer warranty.