Year-End SaleEnds 1/1/26. Limited quantities. No rainchecks.

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 1784 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 56 Showing 1,101-1,120 of 1,784 reviews
  • Rated 5 out of 5 stars

    Great value

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

    Great power supply, i like it. I wish the cables were a little longer and less thick but the power supply runs well and the cables are great quality. I am running 5800x, 64 gb 3600 MHZ ram, 2 m.2s, 2 sata SSDs, evga 3070 rtx and 9 fans. Works like a charm.

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

    Good choice for a reliable PSU

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

    Great PSU, tons of connectors in the box for all your power needs, the psu itself is a bit heavier then im used to but that tells me better build quality, Tested with a psu tester and its spot on. it does make a pretty audible CLICK when turning on or off. but for a gold supply its a good choice!

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

    Rated 4 out of 5 stars

    Good PSU

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

    Wish it had more standard cables instead of the propriety Corsair cables. Great psu overall no complaints. Little expensive for a 850w gold

    No, I would not recommend this to a friend
  • Rated 5 out of 5 stars

    Great power supply

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

    Working well so far, the quality seems good and this is a highly rated/reviewed PSU. This isn't really a negative for Corsair since every PSU manufacturer does it the same, but it would be great if the included cables didn't have merged terminals and were more like the cables from cablemod.

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

    Best power supply

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

    Work great with my new build !, Corsair is one of the best computer company’s for parts

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

    It works as intended

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

    I've read people's reviews on this complaining about fan noise but was not an issue with mine. No surprise on what wires or if a cable bag is included because it's pictured. Go watch a review online first. Powers 4x 3070s without any problems. But I only got this one because they didn't have any 1000 watt PSU's.

    I would recommend this to a friend
  • Best Buy Employee

    Rated 5 out of 5 stars

    Great PSU for a good price

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

    I either buy corsair PSUs or MSI PSUs and either one is a great psu. Bought this one because it was on sale and love it.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Worth the $$

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

    Giving this a 4 out of 5 since it was a replacement for the same model. This is the first of many corsair PSUs that I have owned that actually failed after 4 years. The newer one is significantly lighter and about an inch smaller than the one that failed. Super easy to swap out, Four screws and unplug/replug. Never had any problems with consistent power for the 12v for my gaming card, unlike other "top" brands. Still a definite recommend if you are looking to upgrade or just want a good PSU.

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

    Good psu

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

    Good psu don’t cheap out on psu it’s excellent wish price was a bit cheaper but the quality is good

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

    Rated 4 out of 5 stars

    Easy to install

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

    Power supply was easy to install and works very well.

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

    Amazing PSU

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

    I love the colour. Even though I have a shroud that covers my PSU, I felt guilty having an all-white build with a black PSU. Now everything is perfect down to the black accents. It is quiet and I opted for an 850w in hopes that one day GPU prices will come down and I can order a 3080.

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

    Perfect for gaming rigs!

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

    A good power bank for the price! Super reliable and has a impressive wattage capacity I would definitely recommend!

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

    Fantastic upgrade

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

    A nice upgrade for what I need now and in the future, was pretty easy to install and came with plenty of cords.

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

    It powers up

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

    Way better than the prebuilt one I had, entirely customizable and easy to figure out where power is meant to route, the brand seems good and fit perfectly in the case which was a worry

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

    Excellent PSU

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

    I had a CX600 PSU from Corsair that has lasted me since the AMD 8350 came out. I upgraded my cpu and gpu and needed more juice to handle it. So far this psu has been awesome and it fit perfectly in my Fractal Define R6 case with ease.

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

    Great bang for buck

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

    Had to buy more mounting screws, either lost or didnt include any. But has been running and manging my 800watt setup for 7 months with little no problem

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

    Ease of use product

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

    Easy to install and works great. also 5 stars for Best Buy order pick up

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

    Rated 4 out of 5 stars

    Very good

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

    If you’re using a a Ryzen 5000 series with an Nvidia 30 series, this is more than enough

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

    Works flawlessly

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

    Works perfectly, very quiet, just make sure you keep the spare cables in case you need them later while upgrading

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

    Corsair locally available saved the day

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

    The PSU was easily found and was exactly what I needed. It was on sale, so that was nice. It worked perfectly replacing my PSU that had failed in the system I used it in.

    I would recommend this to a friend