Corsair RMX Series, RM850x, 850 Watt, 80+ Gold Certified, Fully Modular Power Supply (Low Noise, Zero RPM Fan Mode, 105°C Capacitors, Fully Modular Cables, Compact Size) Black

(433 Reviews)

Price
$121.79

Quantity
(10000 available )

Total Price
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1580 Ratings
1159
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213
Reviews
  • B.A.R.

    > 3 day

    Replaced my PSU with this one and its been doing great. I dont necessarily game, but do some video editing and I havent had issues with power. I do like the fully modular PSUs just to keep cord clutter at a minimum. I would have appreciated a bit better instructions as there was a bit of confusion on my end as to which cables I needed to use and where they were supposed to go in the PSU itself. I dont think it really mattered, but when the cables are labelled, but then the plugs on the PSU are not, it just leaves the question open. It also came with a bag to keep extra cables, which was nice. Overall, it was easy to install and has been very solid for several months now.

  • Luis Reyes

    > 3 day

    I dont recommend this PSU, after a year of use, it died for no reason, I was watching a YouTube video, and I heard a little explosion inside my PC, and effectively the PSU was the responsable. It wasnt any external problem that caused it (like low or high electrical issues at home, cables, any), it just came defective.... And the custumer support its terrible, they dont answer you never. No recommendable.

  • Felipe O.

    > 3 day

    Lo único malo sería los cables que son bastante gruesos.

  • Fraggy

    > 3 day

    Funcionó perfectamente

  • Rene Daneault

    Greater than one week

    Showed up on time. A great PSU

  • Tod S.

    > 3 day

    I dont run any fancy testing, but this power supply generally reviews very well, and is functioning very well for me. My only complaint is that one of the screws wouldnt tighten properly, as the threads must have been stripped out of the box (it seems like this is a common problem with a lot of power supplies, as several of my builds have had the same problem with various PSUs)

  • Nick

    Greater than one week

    I purchased the RM750 after I got a more powerful GPU for my first build. Up until then, I had been using a 600-Watt EVGA non-modular PSU (which was great and had enough power output, but didnt have two PCIe 6+2 connections). Going to a fully modular PSU was quite convenient since I didnt have a load of unused cables hardwired into the old PSU just gunking up the space under the case. The installation was easy enough, and this PSU has more than enough connections for most applications. The thing has been working flawlessly since, and is ridiculously quiet.

  • Robert Remington

    > 3 day

    Dead on arrival. Very disappointed. Hopefully the return will be easy, right?

  • Drake sanford

    09-06-2025

    awesome product gotta love corsair wouldnt use anything else

  • david

    Greater than one week

    Very good product, I never had corsair once fail on me. Definitely recommend.

Corsair RM850x series power supplies are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC. Using only Japanese 105 Degree C capacitors, users can depend on an RM850x PSUs" long life and reliability, backed by a ten year warranty. Zero RPM Mode means an RM850x series PSU is virtually silent at low and medium loads, and even at maximum power, a low noise fan ensures quiet operation. Fully modular cables make PC builds and upgrades easy, as you only need to install the cables your system requires. Quiet, efficient and dependable, an RM850x PSU has everything you need to power your high performance PC for years to come.

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