Corsair RM850x ATX V3.1 (3rd Gen 2024) Review

This new Corsair RM850x has proven to be a very capable power supply in our testing over the previous week. The build quality is high and the use of a fluid dynamic bearing fan with control knob ensures the end user can tune the noise levels until high power levels are demanded. In the real world, this power supply is reasonably quiet at loads most people will be seeing (500-600 Watts full draw).

The long term partnership with CWT has been fruitful for Corsair. This power supply is very well put together, with quality 105C-rated capacitors from Japanese brand Nippon Chemi Con used in the primary stage, a good indication that corners have not been cut. Soldering quality is also high, and the placement of several large heatsinks ensures the main PCB has adequate cooling across a wide range of demanding situations. This is a very good platform that deserves a lot of praise.

I like the quality of the cables supplied with this power supply and, being a modular design, you only need to attach the cables you really need for whatever build you are working on.

Technically, the unit is very solid. Ripple suppression is very tight and falls well within industry rated parameters and load regulation also proves a good selling point across all the rails. Efficiency is good for a Gold rated supply and it is always pleasing to see Corsair putting value in the Cybenetics system, I just wish more manufacturers would drop the dated 80 Plus standards to focus on this much more modern, capable certification platform.

The pricing of this unit has been moving a little over the last week, but using the Corsair webpage, we can see they are selling it directly for £147.99 inc. VAT HERE. This is not a budget power supply, but it is worth the money as it delivers quality power.

It is worth pointing out that there are previous versions of the RM850x power supply still being sold online, so make sure you get this latest version. Corsair are standing behind the RM850x with a 10 year warranty, for peace of mind.

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Pros:

• ATX 3.1 and PCIe 5.1 ready.
• Cybenetics Gold Efficiency certification.
• Tight load regulation.
• Great ripple suppression.
• Low noise until higher loads.
• Fluid dynamic bearing fan.
• 10 year warranty.
• Fully modular.
• Control knob to adjust fan speed.
• Delivers the full 850 Watts.

Cons:

• It's quite expensive.

KitGuru says: The Corsair RM850x delivers quality power, the build quality and modular cabling are both excellent. Technically ripple suppression is very tight and the adoption of a quality fluid dynamic bearing fan, along with manual control, means you can tweak this supply to be as quiet as possible. We recommend this power supply without reservation for a new high end PC build.

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