Customer Ratings & Reviews

Purchased for a new build. Very happy with it. I hardly know when the fan kicks in. Very cusomizable cables included. Good buy.

This power supply was great for my build maybe a bit over kill. It’s very silent and it comes with every cable you can imagine.

Been a year, and 0 power supply issues. It’s also pretty good on power and can handle my build.

What can I say besides the fact that it is quiet, so quiet that you cannot hear it. Supplies plenty of power to my computer.

Bought this to replace my 750 watt as my 3080 was taxing it so much. Works perfect and is pretty quiet. Great value!

Excellent PSU for a high end computer build. Runs my Ryzen 5900X and RTX3080 with no issues. Very happy with purchase.

I had to replace my power supply in a hurry so I didn't want to wait for shipping and they had this unit at my local best buy. I like the modular design, lots of cable hookups. I really like how under low loads the fan doesn't even come on at all. Really great feature, it made the whole computer much quieter when sitting at idle. One thing to not. Replace ALL the cables, don't think you can reuse the cabling from your previous modular supply even though it plugs in. I tried this and it fried my optical drive.

Great PSU. Very quiet and included cables are good. I prefer this over the newer 2020 model.

Got this on sale. Being fully modular is the way to go, makes your cable management easy. Fans havent kicked on yet, using around 450w

A little pricy but great quality modular psu. Wires are all wrapped in durable mesh. Quiet as well. To pull air from outside the case had to install with rmx850 badge upside. Not the best design imo. Doesn't impact the performance in any way but details do matter...

Works great, standard corsair quality, fixed my 5 year old EVGA that started having issues. Great bang for the buck.

Awesome psu. Ultra quiet. Makes my 3080 go Brrrrrr. Cool little bag to keep the extra cables in. Would recommend.

Built with power to spare, the fan only runs when under a higher load. It also comes with extra cables.

I haven't built a PC in probably 10 years and couldn't believe I would need 850 Watts, but I did and this thing works fantastic and it's quiet!

Fits in almost all builds. Fully modular so its plug snd play only what you need to plug in. Very quiet and runs great

Technically, this provides more power than I need for my home built PC. But it got my PC up and running, and it runs quietly.

This thing is built like a tank. This RMx series is rated as a Top tier/Class A power supply so it is in the best of the best in terms of quality/production. It's not a platinum level PSU but none of us normal people can afford one anyway. But for a Gold level, it's one of the best. It's as good as the Seasonic and SuperFly power supplies. Only gripe is Corsair makes their PSU cables super stiff and they are painful to plug and unplug. Otherwise good stuff

Very good power supply, quiet and reliable. Fan only comes on when needed. Runs my system exceptionally well.

My system is an iBuyPower prebuilt that I purchased Black Friday 2019. For the 9700K it had and the 2080 Super card that came preinstalled, the included 650W off-brand power supply worked just fine. However, I was recently fortunate enough to be able to purchase an RTX 3080 FE from Best Buy. I used an electricity monitor to see how much power I was pulling from the wall while playing Flight Simulator and COD: Cold War maxed at 4K. I was regularly drawing 550 on average, with brief spikes just over 600. I've built systems before from the ground-up, but I've never disentangled the web of cables left for me in the back of a prebuilt, so I had a lot of anxiety about replacing the PSU. However, in about 30 minutes I was able to ditch the old PSU and replace it with only four modular cables coming out of the back of the RM 850x. I didn't realize how many extra cables they include with the non-modulars in these prebuilts! My old PSU used to sound like a jet engine taking off when I would play a game at max settings, while I don't know if I've even heard the fan on this one, yet. The only con and the only reason why I will knock this for "ease of use" is that the included cables are very thick, inflexible, and pretty short. I had a little bit of a struggle routing these cables through the back of my case and finally stuffing the PSU into the basement of my case. If I had purchased cable extensions, this would be a non-issue, but I believe the included cables should all be 3-5 inches longer. Overall, if you're looking to upgrade the components in your PC and think you might need a little more juice or overhead, don't hesitate to buy this unit. But maybe consider getting cable extensions.

This has all the power I needed for my pc build. Runs quite and love the modular cables. No need for a cluttered mess