Customer Ratings & Reviews

Great power supply works perfectly Best Buy had it in stock ready to pick up

Exactly what it is, works as described and doesn’t have issues

Works great and the setup was very simple. Recommend.

Good build quality and no issues so far. Nice amount of modular cables. The “x” models are made with Japanese capacitors if that matters to you.

Amazing service i love bestbuy. Love how they started catering to pc gamers

Good modular power supply with big 140mm fan and best part is the manual fan speed adjustment !

This is ATX 3.1 complient which makes it incompatable with Asus Strix X99 Mother Boards. This is due to the removearal of the negative 12 volt connection (pin 14) which is now set to a modulating voltage (read somewhere online trying to figure out why I couldnt get my computer to work)) I got this psu as it was listed for $76.99 on the shelf and I thought that was to good to be true. I even had a employee come over and check and they saisd that was in deed the correct price. So I got this psu and went to check out. It is in fact NOT $76.99 BUT $149.99 Pic for reference. So I am not a fan of Best buys switch and bait on prices. If I didn't need my PC up and working I would wait for a replacement psu from amazon. Icing on the cake this PSU is not compatible to my PC as ATX 3.1 is different than ATX 3.0. So if you have older hardware than you will need to avoid this as the new standard is not compatible. ATX 3.0 is the last compatible standard for older hardware.

The Corsair RM850x is an excellent PSU that provides a top-tier balance of performance, features, and value. Its silent operation and fully modular cables make for a clean and quiet system, while its robust power delivery and high-quality components ensure long-term reliability. Just be mindful of the specific model version you purchase if ATX 3.1 and PCIe 5.1 support are critical for your build.

Great performance, not too noisy, 0 trouble. The quality of the cables is great, fully modular so its easy to install, I used to power a R7 7700x with a 7900xt, tons of fans and RGB and this psu has more than enough power. Highly recommend.

The Corsair RM850x is a powerhouse—literally. I chose this PSU for a high-performance build with a 5060 Ti GPU and Ryzen 7, and it hasn’t missed a beat. Power delivery is rock-solid even under full load, and the 80+ Gold efficiency rating means it runs cool and helps keep the energy bill in check. Fully modular cables make the build process clean and simple—no extra clutter in the case, and airflow is noticeably better because of it. The fan barely ever spins up under normal use, and when it does, it’s virtually silent. It also includes a generous amount of cables for future expansion, including PCIe 5.0 GPU compatibility. This is one of those “buy it once and don’t worry again” components. Whether you’re gaming, editing, or just building for stability, it’s a smart investment.

The CORSAIR RM850x is a rock-solid power supply! It’s quiet, reliable, and provides plenty of power for my setup with room to spare. Installation was simple, and the fully modular cables make cable management a breeze. With excellent efficiency and build quality, this PSU is a great choice for anyone looking for a dependable upgrade.

Not sure what else I can add that hasn't been said 10000x about Corsair RMx PSUs. Silent operation. Nice cables. Easy to plug in. Powers all my stuff. Native 12VHPWR. Best bang for buck re: PSUs for a long time now.

Been great so far, very easy to set up with high quality and organized cabling. My favorite part is that it comes in eco-friendly packaging with no plastic! If anything thats just nice when throwing it away because mountains of hard plastic are a pain in the booty with other products.

Easy to install and the cables have a nice look. Wish it had a second PCIE cable though…

Exactly what I needed. Super quiet and super reliable.

I was in need of a new PSU, so I chose the RM850x because I read what was in it as well as the overall ratings it had. The PSU performs beautifully and exceeded my expectations. My system looks much cleaner now too. The previous faulty PSU had multi colored cables that stuck out like a soar thumb, now the cables look significantly nice in my system and they blend well. Also came with a 12vhp cable and port, not that I am using it since my GPU doesn't require it, but it's nice to know that I have that option if I upgrade to something that needs it in the future.

works great. its been quiet, no hicups on power delivery, no issues at all. there are cheaper psu out there, but this one is highly rated and should last you for years provided you dont need more power down the road.

I bought this for my first build. 9800x3D, 9070XT and it is working just fine. No issues so far after a few weeks. Runs silent and keeps giving power

I generally have never had any problem with Corsair products. This power supply replaced my mothers from 2012. Yeah 2012. They're generally only supposed to last 7 to maybe 10 years and that thing was over 13 years old. Well her original power supply which was an ATX one from like 2011 or 12 and I think it was still okay but it was just so old that when I put my computer parts in it from 8 years ago it demanded more power and I didn't want to have it. Underpowered so I got her about 100 maybe 200 w more than she needed just in case he needs more power later on. Overall Corsair products are great products until you need customer service. I bought a power supply a 1200 w one and it's supposed to come with two pcie cables for the graphic cards. For some reason it was a mistake in the box and it was only one in there and most gpus nowadays are so overpowered to use three plugs back in the day. Corsair used to give you more than what you needed back in the day they used to use two, so they'd give you like four or even five. This one didn't even give you enough for a High-End graphic card which uses three plugs. The mid-range ones use two so you know you always got to give a spare even when you're buying a piece of furniture. They always give you at least one or two extra screws in case one of them gets stripped or they break and you know and then they give you dual PCI Express adapters which can become unstable and where two plugs plug into one power unit and it's just not a safe thing to use. Most of the friends that I have never use those cuz they say they can be unstable they can heat up. One said they had theirs melt. It's just not safe. You need three separate pcie cables, not two combined into one so I said why did you even include those? If you're going to include one and give us extra pcie cables, it took them over a month. Numerous mistakes. Then they sent me four PCIE dual cables and I'm like that's not what I asked for. In fact I said specifically don't send me these for one reason or another and that's what they did the first time and it wasn't even the ones that came in my power supply after are going back and forth with them for over a month. I said look send me exactly the same type the flat pcie cables separate ones not dual the exact same ones that come with my power supply do not deviate from it. Donami send me braided one send me the exact same ones that came at my power supply with the exact same part numbers that are on the cables and after over a month of arguing back and forth they finally sent me the correct cables and four of them. That's my only reason. Wife of four star is out of five. You know if you don't have any problems with the products which I think 90 to 95% of the time you won't and there's no issues then you generally don't have to worry about their product cuz I have some quality products there. Just make sure that when you're buying a power supply you buy a little leeway in case you get more energy demanding parts like gpus. So if you think you need a thousand get 1200 if you think you need $750, then get a 850 or $1,000. Always get a little more than what you need for a little leeway just in case and that's what I've always done since 1999. The price was good also on this product because it was on sale and it was less expensive than going to a competitor. So the timing was perfect that this was on sale cuz she needed it. Hers was so old I wasn't going to take a chance on it even if it did last another couple of years. It was well past its prime so I got her on new modular one so I didn't need all the extra cables that the old one had. That's how old it was

I recently upgraded to the Corsair RMx Series RM850x Cybenetics Gold Fully Modular ATX Power Supply, and it has been an excellent choice for my system. One of the key reasons for upgrading was to support my new Nvidia GPU, and this PSU delivers flawlessly, especially with the built-in 12VHPWR connector, eliminating the need for adapters. The adjustable fan in the back is a great feature, allowing for better cooling control and quieter operation under different loads. The fully modular design made installation and cable management a breeze, keeping my setup clean and efficient.