Customer Ratings & Reviews

I bought this as sort of a spare tire for my PC, if the old one breaks I can not only replace it with this one, but it has more power capacity and higher accolades on it, is has been reccomended by every one of my computer science friends and so far its been very good.

Being a Corsair fan for many years, I was not disappointed with this fully modular GOLD rated power supply. Being able to power the basic motherboard is nothing special, but, being able to supply the plus 4, plus 8, plus 12 ports for the cpu makes this power supply exceptional. This psu does NOT have RGB fan lighting, but being 90% efficient and zero RPM capable makes up for it!

Amazing performance and price. Easy install and all the cables I need

love the rm series. my 3rd one. reliability is great price is right and youncant go wrong with corsair.

Purchased this power supply to replace the low wattage one previously being used. Fan runs very quiet unless under heavy load, even then it’s very hard to notice. Works very well so far and the cables and equipment that came with it to help manage the cables were very welcome. Would recommend for anyone needing a new PSU, price being a little high was well worth it.

So far I have not ever had one of these fail or give me any trouble. Bought this one to upgrade my portable pc that I built to take to friends' houses using an mATX case. 5800x, 6800xt, 16gb 3600 cl16 ram, and two nvme drives. and 5 case fans. Powers it all with no trouble even with rage mode turned on and gaming at full tilt at 1440p. Highly recommend.

This is the 2nd one I bought of of this Corsair RM850x. Why? Because I have two Nvidia RXT 30 series cards and needed the power to support. A 3080Ti and a 3070 Ti. The PSU offers great value, tons of connections and fully modular design. Quiet, fan only runs occasionally and is still quiet even under heavy gaming and graphic loads.

The PSU was easy enough to install. I saw a yourube video to prepare and I was able to replace my old one with this one with no issues. This one is noticeably quiter than my last one which is nice. The PSU comes with everything you need to install but maybe some instructions or a guide would be helpful for some people who maybe aren’t as familiar with PCs. Fast shipping and overall very happy with my purchase.

Always trust Corsair not had any problems with them for years a reliable and robust choice for powering your rig. A powerhouse capable of handling demanding setups if you need a upgrade and can't wait just get this one and it will do it's job Plus more.

Runs well, quiet, and cool. You will need at least this power to run a 3080 ti.

Comes with everything you need for a new build. Does what it supposed to do.

The CORSAIR RM850x 80 PLUS Gold Fully Modular ATX Power Supply stands as a pinnacle of reliability and efficiency, catering to enthusiasts and gamers who demand high-performance components with a focus on precision, modularity, and power efficiency. 80 PLUS Gold Efficiency: The RM850x power supply boasts an 80 PLUS Gold efficiency rating, ensuring that it operates with high energy efficiency. This certification means that the power supply converts a significant portion of electrical power from the wall into usable power for your components, reducing energy waste and heat generation. 850W of Robust Power: With an output of 850 watts, the RM850x provides ample power for demanding gaming rigs and high-performance systems. This power capacity ensures stability even under heavy loads, making it suitable for enthusiasts with multiple graphics cards, high-end processors, and other power-hungry components. Fully Modular Design: The fully modular design of the RM850x offers flexibility in cable management. Users can connect only the cables needed for their specific system configuration, reducing clutter and enhancing airflow within the PC case. This not only improves the aesthetics of the build but also simplifies the installation process. Premium Components and Build Quality: Corsair is renowned for using high-quality components in their power supplies, and the RM850x is no exception. Japanese capacitors and a robust design contribute to the overall durability and reliability of the power supply. The build quality instills confidence in users, ensuring that the power supply can withstand the demands of high-performance computing. Zero RPM Fan Mode: The RM850x features a Zero RPM fan mode, allowing the fan to remain off during low to moderate loads. This results in a silent operation, as the fan only spins up when needed under heavier loads. The combination of efficient cooling and a quiet operation makes it suitable for users who prioritize a peaceful computing environment. Corsair Link Compatibility: For users who want advanced monitoring and control, the RM850x is Corsair Link compatible. By connecting it to a Corsair Link system, users can access real-time monitoring of power supply performance, efficiency, and temperature, providing insights into the system's power consumption and health. Overcurrent, Overvoltage, and Short Circuit Protection: Safety is paramount in power supplies, and the RM850x incorporates multiple protection features. Overcurrent, overvoltage, and short circuit protection mechanisms safeguard your components from potential electrical issues, ensuring a stable and secure computing experience. 10-Year Warranty: The RM850x comes with an impressive 10-year warranty, showcasing Corsair's confidence in the longevity and reliability of their power supply. This extended warranty period provides peace of mind for users, knowing that their investment is well-supported. Conclusion: The CORSAIR RM850x 80 PLUS Gold Fully Modular ATX Power Supply stands as a testament to Corsair's commitment to quality and performance. With its gold-rated efficiency, robust power output, fully modular design, and premium components, it caters to enthusiasts who demand nothing short of excellence from their power supply. While it comes at a premium price, the RM850x justifies its cost through its reliability, efficiency, and the peace of mind that comes with a 10-year warranty. Overall, it's a stellar choice for users building high-performance systems with an emphasis on precision and power efficiency.

Powered on no problems, easy to intall with plenty of extras for spare parts. Quieter and so much more efficient than the 600 watts i exchanged it from.

Replaced a failing power supply (also from this brand). It was fairly easy to install and seems to be running well and quietly. I guess time will tell about the quality.

Just built a new PC with this. Love how it's modular and easy to only use the cables I needed. A bit heavy in comparison to other power supplies I've used. No problem powering a Ryzen 7 7800X3D and a XFX RX 7900 XTX with 2 SSDs.

Easy install and has been awesome to handle all my 3060oc needs, recommend and looks amazing in the case....sleek and simple

very good power source, i have been building computer systems for over 20 years and corsair has never let me down, it stays cool and i put my systems through some serious video rendering and have had over 500 images in photoshop adobe raw and it never overheats and keeps the power coming, i highly recommend it.

This is my second Corsair PSU for my second PC build. Modular is the way to go. Only use the cables you need. Makes for a nice clean build. I have no complaints. Super quiet and does what it’s supposed to just like the RM750 I purchased previously. 850 watts is more than enough for most peoples needs. Recommended for sure.

Got this due to stepping up to a larger GPU. Very easy to put in my case and being fully modular allows better cable management. The cables can be a little stiff if you are making a pretty decent bend in the cable but I would rather it be that way then a cheap flimsy cable. No noise noted with it even with the fan running.

The CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply worked as intended. It came with plenty of connections to get the job done. Had to upgrade from a 6 year old 750W that did not seem to like my new build. So I am happy that this 850w solved my random restart issues with my new build PC.