Customer Ratings & Reviews

Was going to give it a 3 or so but honestly I can’t even manage that. This series is so unbelievable to me. Many downgrades from the previous rm850 and it is at this point 20 or so dollars more. Returning mine and waiting for the old 850 to ship. Main complaint is noise and a very strange cable layout. Be careful as other reviews have pointed out. They are now shipping with 2!! PCIe daisy chained connectors vs the 4 that they originally shipped with. Although there are 5 8 pin connectors on the PSU you have to bug Corsair support if you want to run a 3x 8pin card with dedicated cables. Strangely they ship with 3 EPS/ATX 12v cables that I can’t come up with any reasonable use case for.

It works like a power supply should, but it’s unbearably loud—louder than all of my power supplies, louder than an ancient dell computer you’d see dime a dozen in elementary schools. the weird thing? It’s not heating up. Nothing seems to be wrong about it, the fans just go from super quiet in bios setup to maximum overdrive as soon as i get into windows. maybe i did something wrong? i used all the cords out of the box and tried as hard as i could to brute force all the power supply plugs as snugly as possible. If I’m doing something wrong, please give me your insight i just cant believe this power supply ended up sounding worse than my starter one from 2015.

I recently had the opportunity to test the Corsair RM850x power supply unit (PSU) for my custom-built PC, and it has left a lasting impression on me. This PSU stands out for its exceptional performance, build quality, and reliability, making it a top-tier choice for both gamers and professionals. First and foremost, the RM850x boasts an 80 PLUS Gold certification, ensuring high energy efficiency. This means less wasted power and lower electricity bills, which is always a plus. The unit delivers a stable and consistent 850 watts of power, making it suitable for high-performance setups, including those with multiple GPUs and power-hungry components. One of the standout features of this PSU is its fully modular design. The ability to connect only the cables you need helps reduce clutter and improves airflow within the case. This not only makes the build look cleaner but can also contribute to better cooling performance, which is critical for maintaining system stability. The build quality of the RM850x is evident right out of the box. It has a solid and durable construction that inspires confidence. The fan operates quietly, even under heavy load, thanks to Corsair's Zero RPM Fan Mode. This feature keeps the fan off during low to medium loads, ensuring silent operation when your PC is idling or performing light tasks. Additionally, the comprehensive set of protections, including over-voltage, under-voltage, short circuit, and over-current protection, ensures that your components are safe from power-related mishaps. This level of protection is crucial for safeguarding valuable components, especially in high-performance systems. Installation was a breeze, thanks to the clear and concise instructions provided by Corsair. The inclusion of high-quality, sleeved cables made cable management straightforward, and the PSU fit perfectly into my mid-tower case. In conclusion, the Corsair RM850x power supply unit is an outstanding choice for anyone looking to build a high-performance, reliable, and efficient PC. Its blend of power, efficiency, and quality makes it worth every penny. Whether you're a gamer, content creator, or professional, this PSU is sure to meet and exceed your expectations.

The CORSAIR RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply is an absolute powerhouse, earning its well-deserved five-star rating for its exceptional performance, efficiency, and modular design. The RM850x has proven to be a reliable workhorse, delivering a consistent and stable power supply to my high-performance PC build. The 80 PLUS Gold certification ensures not only efficiency but also lower energy consumption, making it an eco-friendly choice for those conscious of power usage. The fully modular design of this power supply is a game-changer. Cable management has never been this easy, allowing for a clean and organized build. The ability to choose and connect only the necessary cables enhances airflow within the case, contributing to a cooler and more efficient system overall. The build quality is top-notch, a hallmark of CORSAIR products. The power supply feels robust and durable, instilling confidence in its longevity. The quiet operation is particularly noteworthy, thanks to the Zero RPM fan mode that ensures silent performance during low to moderate loads, creating a more pleasant gaming or working environment. The RM850x doesn't compromise on safety either. Over-voltage, under-voltage, over-current, and short circuit protection features provide peace of mind, safeguarding both the power supply and connected components from potential damage. Installation is a breeze, thanks to the well-documented instructions and the inclusion of high-quality cables. The power supply's compatibility with the CORSAIR LINK software allows for real-time monitoring and control, adding a layer of customization to suit individual preferences. In conclusion, the CORSAIR RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply stands as a testament to CORSAIR's commitment to quality and innovation. It's a stellar choice for gamers, content creators, and PC enthusiasts who demand high performance and reliability. Without a doubt, this power supply earns a solid five stars and my wholehearted recommendation for anyone seeking a premium and efficient solution for their PC power needs.

My rig was in desperate need of an upgraded GPU. The previous GPU only required an 8-pin power supply. When I purchased my new GPU, the product data suggested an 850 (or greater) power supply. The new GPU also required 24-pin power. I already owned a Corsair 750M and have had zero issues with it. Consistent performance and absolutely zero problems made the decision to purchase another Corsair product very easy. In addition to the actual power supply unit, this model includes One (1) ATX 24-pin, Three (3) EPS/ATX12V 8-pin (6 + 2), Two (2) PCIe 8-pin (6 + 2), One (1) Peripheral 4-pin, Two (2) SATA (3 SATA), and Two (2) SATA (4 SATA) cords. The PSU fits in any standard case and is providing plenty of power to my rig. I would highly recommend this product.

One of the best power supplies on the market. Easy to install and cable manage since it's fully modular. Gold rating so you can feel a little less guilty about how much power your pc uses. Actually priced reasonably unlike most of Corsair's stuff. Powers my 3080Ti with no problems.

Corsair and EVGA have always been the gold standard for power supplies as far as my experience goes. Now that EVGA is slowing down operations, I'm glad that Corsair still makes stellar power supplies - and this one is no exception. No issues running a 7800x3D and 7800xt. Operation is very quiet and the cables supplied are pretty sturdy and well built. Installation was simple enough as usual. Thanks Corsair!

This works great! I’ve used it for about 6 months now. It comes with plenty of cables for most people and they’re all high quality. This thing is quiet. It doesn’t make a peep when under full load. Easy to install. I wish it came with one extra PCIe 8pin cable, it includes 2 in the box. Fully modular is always nice and this makes it a breeze. Gold certified and rated highly on the PSU tier list.

I was just sleeping like a normal regular person does and then BOOM its throwing voltage out and arcing off the case. Very first power supply of this brand ive ever used.

This power supply has worked wonderfully for me. Super simple install (with computer building experience), and the full modularity makes it so cable management is easy. The fan hardly makes any sound when active.

Bought this to power new 30 series card (at the time) and 13th gen intel CPU. Handles it just fine with no issues. Installation was easy, especially with it being fully modular. Cable management was a breeze because of that, especially because I was upgrading incrementally.

This thing is great. As someone with almost no building experience, it was a pretty simple installation. You can pick and choose which cables you want to put in, and it comes with TONS of different cables so you can really go wild. There's not much to say about performance... It's a power supply. That's it. The most notable thing I'd mention is that the PSU is a 0 RPM supply, meaning that it's dead silent. Obviously if you put your ear to it, you hear some hums, but upon replacing the power supply of my old prebuilt, it went from a jet fan to a silent killer INSTANTLY. There are also heat-resistant zip ties, and the cables all come in sleeves, so it looks great for a standard black build (or black and white if that's what you're going for).

Im extremely satisfied with this purchase. I had an older model power supply that had died, and it was a model that had all of the cabling hard-wired to the unit. This power supply had ports that allow you to opt into whatever power needs your rig may need, which really helped when it came to cable management. I installed this power supply about a month ago, and its running smoothly with no problems. Its also pretty quiet, even with the fan running.

I recently acquired the CORSAIR RMx Series RM850× 80 PLUS Gold Fully Modular ATX Power Supply, and it has proven to be an exceptional investment for my PC build. This power supply deserves a resounding five-star review for its outstanding performance, remarkable efficiency, and unparalleled reliability. First and foremost, the RM850× delivers an impressive level of power to meet the demands of high-performance systems. With its 850-watt capacity, it provides an ample amount of power for even the most power-hungry components, ensuring stable and consistent performance. Whether you're a hardcore gamer or a content creator, this power supply has got you covered. The efficiency of the RM850× is truly remarkable. With its 80 PLUS Gold certification, it boasts an efficiency rating of up to 90%, which translates to reduced energy consumption and lower operating costs. This power supply not only saves on electricity bills but also runs cooler and quieter, thanks to its highly efficient design. One of the standout features of the RM850× is its fully modular design. The ability to detach and connect only the necessary cables not only simplifies cable management but also enhances airflow within the PC case. This modular design ensures a clean and organized build, reducing clutter and improving overall system aesthetics. The build quality of the RM850× is top-notch. CORSAIR is known for its exceptional craftsmanship, and this power supply is no exception. It is built with high-quality components and offers excellent voltage regulation, resulting in a stable and reliable power delivery. Additionally, the 135mm cooling fan operates silently, effectively dissipating heat while maintaining a quiet environment. The RM850× incorporates a comprehensive suite of protection features, including over-voltage protection, under-voltage protection, over-power protection, and short-circuit protection. This ensures the safety of your valuable components, providing peace of mind during intense gaming sessions or demanding workloads. Installation is a breeze, thanks to the included user-friendly manual and the clearly labeled modular cables. The power supply comes with a variety of connectors to accommodate a wide range of components, making it compatible with most PC setups. In terms of customer support, CORSAIR excels. Their responsive and knowledgeable support team is always ready to assist with any queries or concerns. This level of customer service adds to the overall positive experience of owning a CORSAIR product. Overall, the CORSAIR RMx Series RM850× 80 PLUS Gold Fully Modular ATX Power Supply is an exceptional choice for PC enthusiasts and builders. Its robust performance, impressive efficiency, modular design, reliable build quality, and excellent customer support make it a top-tier power supply option. I highly recommend the RM850× to anyone seeking a reliable and powerful solution to meet their computing needs.

I currently have 5 computers with Corsair RMx Power Supplies. They have all been reliable and they are my goto PSU’s any time I do a PC build. They are good quality, quiet and run cool. Highly recommended!

If you're looking for a modular PSU, this is it! It has more than enough cable options for any high performance PC that has power requirement below 750W. (It's best to have some margin). Fans has too silent, I've never heard those even once in my usage for about a year now. I'm using this PSU with i7-12700KF and RTX 3060 (3x Fans) and a bunch of other stuff but that's the major highlight.

Reliable, affordable, quiet. Great Choice and overall probably the best in its class.

Upgrading a bit from a 750-watt Gold.. this brand has always been reliable and fantastic. I can't even tell this thing is on but it does it's job exactly as expected. Great power supply.

This is the second psu I’ve bought from Corsair and it was the same model as this. Works great and you have plenty of headroom for upgrades if you are in the mid-high range builds. 850 works perfect. Only reason to go higher is to “future proof” for when nvidia starts making bigger watt guzzling gpus.

Easy install process, worked great to power my entire system hasn't given me even one problem in almost a year of daily use