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Customer Ratings & Reviews

Your price for this item is $149.99

Customer reviews

Rating 4.8 out of 5 stars with 1782 reviews

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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

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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 25 Showing 481-500 of 1,782 reviews
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Best Power supply around

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

    I picked it up awhile back and this has been the best power supply I have bought to this day, I’ve had 0 issues with it. Great purchase

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

    Rated 5 out of 5 stars

    It works well.

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

    I used it to replace dead power supply in my Alienware pc tower, it fits in there perfectly. Works great , love it.

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

    Rated 5 out of 5 stars

    Needed to upgrade for new gpu

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

    The psu works great so far. Needed to uprade my power supply for the 3rd pcle power cable. No daisy chaining a 4080! Cant hear any audible noise when playing games maxed out.

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

    Rated 5 out of 5 stars

    Nice Modular Power Supply running 6 months strong.

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Nice modular power supply no issues building with it and been running for about 6 months now with no issues.

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

    Rated 5 out of 5 stars

    Power supply

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

    Includes all the wiring needed for an essential upgrade and then some. Perfect for rtx 3060-4080 gpus. It’s very efficient and delivers power as advertised. Highly recommended!

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

    Rated 5 out of 5 stars

    Great power supply

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

    Corsair always makes good psu's works great with 13900k and a 4090 also ton of rgb in my case plenty of power

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

    Rated 5 out of 5 stars

    Powerful PSU for almost every need

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

    I installed this PSU in my computer to power my I5 10600K and Geforce 3060. I was coming from a rather old gaming computer that was aging really fast. This PSU gives my components the power they need to get me my Fortnite and Warzone victories :D

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

    Rated 5 out of 5 stars

    Best PSU for the price

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

    Best Power Supply for the cost, 850W is sufficient for any rig unless you are that hardcore gamer then you might need a bit more wattage.I just installed this in my brothers Corsair 4000D airflow case and it was so easy to install.

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

    Rated 5 out of 5 stars

    Easy plug ins

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

    Very easy to install into my case. Got perfectly, wired control was easier as well.

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

    :)

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

    Good name brand battery, all cables are fully labled and come with zipties for management. I have been using for a few weeks and it runs very quiet.

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

    Rated 5 out of 5 stars

    Solid PSU

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

    So far it’s performing perfectly. Been Corsair user for years. Always considered their products to be highly reliable.

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

    Rated 5 out of 5 stars

    These never die.

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

    I've used Corsair power supplies for years and have never had a defect or one die on me yet. Hight recommend their modular units.

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

    Rated 5 out of 5 stars

    Corsair RMx Series RM850x 80

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

    I bought the Corsair - RMX Series RM850x 80 Plus to replace my failing power supply. This was a much better replacement for the one I had. My computer is running better then ever. I would buy it again if I were to build another computer.

    I would recommend this to a friend
  • Pros mentioned:
    Noise level

    Rated 5 out of 5 stars

    PSU

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

    Purchased this for a build that uses a RTX 3080. It is a quite psu. Being modular you only need to use the cables required for your build which helps with cable management.

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

    Rated 5 out of 5 stars

    Great power supply

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

    This is the third Corair RMx power supply I have used in builds. I have never had a problem with them, they have always performed great for me.

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

    Rated 5 out of 5 stars

    Aweosme as usual

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

    Got this a few months back havent has any issues what so ever ive owned corsair products since i started building PC’s and they have not let me down.

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

    Rated 5 out of 5 stars

    Powerful

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

    Bought for my 4080 Super and is more than enough power for todays gpus and games

    I would recommend this to a friend
  • Pros mentioned:
    Noise level
    Best Buy Employee

    Rated 5 out of 5 stars

    Good PSU!

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

    Corsair always makes some really good PSUs, first PC had a Corsair PSU and now this second one does as well. No complaining about this PSU and it's quiet as well.

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

    Rated 5 out of 5 stars

    Buy it you can find it.

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

    This is a truly modular power supply and not one of those where they advertise it is but the cable to the motherboard is hard wired into the ps. It's quiet. The individual cables are neatly wrapped and everything is labeled.

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

    Rated 5 out of 5 stars

    Great power supply

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

    Best of a power supply, I've been using it for almost a year now and it takes any new parts i throw at it.

    I would recommend this to a friend