Last-Minute SavingsLimited quantities.Shop now

Skip to content
Gift Ideas
Main Content

Customer Ratings & Reviews

Your price for this item is $149.99

Customer reviews

Rating 4.8 out of 5 stars with 1782 reviews

Rating Filter

Rating by feature

  • Value

    Rating 4.7 out of 5 stars

  • Quality

    Rating 4.8 out of 5 stars

  • Ease of Use

    Rating 4.8 out of 5 stars

Pros mentioned filter

Cons mentioned filter

96%would recommend to a friend

Customers are saying

Customers frequently mention the RMx Series RM850x's excellent performance and quiet operation as major strengths. Its fully modular design and ease of installation are also frequently praised, simplifying cable management and the overall building process. While some users noted its larger size, the positive feedback overwhelmingly focuses on its reliability and value. The power supply is considered a great option for its price point.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 21 Showing 401-420 of 1,782 reviews
  • Pros mentioned:
    Modular

    Rated 5 out of 5 stars

    Very capable ps

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Excellent ps. Fully modular makes a huge difference with a build and have been using them for years. Never had a problem with anything from Corsair. You will not be dissapointed with this. This is running an i7, RTX 3080, 10 fans, a few SSD's and HDD's, and some other bells and whistles without a hiccup.

    I would recommend this to a friend
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    Always worth it.

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought this for a friend who was having problems with his PC. He had some off brand PSU. Once he installed this, everything worked just fine. Love Corsair products for that reason, they are reliable and work as they should.

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 5 out of 5 stars

    Pc power

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works amazing. Works as needed. Very easy to install

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use, Power supply

    Rated 5 out of 5 stars

    Good Buy!

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Quiet and powerful. Easy to install and fully modular.

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Worth the model and great product to your hardware

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great power supply cannot go wrong with it. I decided to do an exchange for the 1000 watt because i started getting new hardware and to be in the safe side i just added an extra 200 watts on top of my max so all the hardware have plenty and because i have 5 satas in use, gpu, etc.

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Works as expected. It powers the thing.

    |
    |
    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Computer turns on, good enough for me! As expected

    I would recommend this to a friend
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    Corsair

    |
    |
    Posted . Owned for 6 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great powerbrick for pretty much anything ypu throw at it this works amazing going on 3 years and still works like new

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use, Power supply

    Rated 4 out of 5 stars

    Needed one for my new Gpu

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this power supply to use with my 3050. It was easy to set up, and install, and I have had no problems ever since.

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 4 out of 5 stars

    No issues

    |
    |
    Posted . Owned for more than 2 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Solid ps seems to run cool and always works would recommend to any one needing this much power

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Needed to Power a New High End GPU

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It fixed my 7900XT not quite living up to potential. I had a 750W version of this, which is what was recommended for my GPU but I think it likes to draw a bit more power than listed. This PSU is fantastic.

    I would recommend this to a friend
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    Solid power supply.

    |
    |
    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This psu has been with me through several setups and worked flawlessly the entire time. It’s a great power supply and it handles a 13900k and an rtx 3080 with no issues at all.

    I would recommend this to a friend
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    The PSU for You

    |
    |
    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Corsair is my go to for several components. I have not, nor my friends with the same product, yet had any issues with my Corsair PSU. Great product.

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    cosair

    |
    |
    Posted . Owned for 1 year when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    love it!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    I would recommend this to a friend
  • Pros mentioned:
    Modular

    Rated 5 out of 5 stars

    Awesome PSU

    |
    |
    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Awesome power supply. I previously had a regular non modular psu and was that thing terrible. The power output was decent but not being able to remove the cables was annoying. With this power supply you can use only what you need. Now I don’t have a ton of useless cables in my case!

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Works great

    |
    |
    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works great. Injection moldings are perfect with no deformities. Runs a 3900x and 2080ti without the fan turning on.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Absolutely worth it!

    |
    |
    Posted . Owned for 7 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this as a gift for my husband because his PC keeps on shutting down. He loves it! Working pretty good for it's price. It's absolutely worth it. There has been no problem with it so far.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Corsair RM850X psu

    |
    |
    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Late review. Corsair has always been an excellent produxt for me. I have always used corsiar since late 90s early 2000s, and always great product. The psu i purchased is well built no issues, powered up my pc with as much powered need to supply.

    I would recommend this to a friend
  • Pros mentioned:
    Modular

    Rated 5 out of 5 stars

    Great Power for cheep!

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Solid power supply, lots of cords to work with and it being gold lined (copper takes more power than used), it was relitevly cheep!

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    teehee

    |
    |
    Posted . Owned for 1 year when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    the power supply is so epic it makes me so happy make my pc so much better :>

    I would recommend this to a friend
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Worked for my Alienware Aurora R5

    |
    |
    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    worked great. My Alienware Aurora R5 power supply went bad and i got this to replace it. worked just fine. The only issue is that there is no micro sata power connection for the DVD drive. Guessing this is yet another Dell proprietary item since i never even knew it was a thing till i tryed to connect it.

    I would recommend this to a friend