Corsair RM850e ATX 3.1 (2025) PSU Review

1. Introduction2. Bundle & Cabling3. External4. Internal5. Testing Methodology and Results6. Closing Thoughts7. View All Pages

Following on from our recent review of the Corsair RM1000e, today we take a look at the 850 watt version in the new range – the RM850e. This is another fully modular power supply with native 12v-2×6 connectors to power the latest graphics cards. These are not the Corsair flagship models so they come with a more limited 7 year warranty.

There are three power supplies in this new range, a 750w, 850w and 1000w unit. The 1000W supply scored well in our testing and you missed that review then head over HERE.

UK prices from Corsair directly indicate that only £10 price difference exists between the 750 watt and 850 watt models, while the 1000W model is £35 more expensive. As we previously mentioned, all models have a 7 year warranty in place which falls some way from the leading 12 years on some of the platinum models we have reviewed lately. This is one of the tradeoffs when you move down a companies product stack but for most people it will be fine.

Key Features:

• Fully Modular PSU: Reliable and efficient low-noise power supply with fully modular cabling, so you only have to connect the cables your system build needs.
• Cybenetics Gold-Certified: Steady power output at up to 90% efficiency, ensuring lower power consumption and cooler temperatures.
• Native 12V-2×6 Connector: Power the latest high-end graphics cards out of the box – no adapter needed.
• Intel® ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting PCIe 5.1 platform withstands 2x transient power excursions from the GPU.
• Embossed Cables with Low-Profile Combs: Sleek, ultra-flexible embossed cables look great and make and connecting the RMe a breeze, even in tight spaces.
• Keeps Quiet: A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.
• 105°C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.
• Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
• Zero RPM Fan Mode: For near-silent operation at lower loads.
• The Right Fit: Compact 140mm-long casing ensures an easy fit in modern enthusiast PC cases.
• Resonant LLC Topology with DC-to-DC Conversion: Provides clean, consistent power and ensures better energy-efficiency across a wide range of loads.
• Seven-Year Warranty: Your guarantee of reliable operation for peace of mind through multiple builds.

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