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 18 Showing 341-360 of 1,782 reviews
  • Rated 5 out of 5 stars

    Smooth Power delivery.

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

    2 years and still going strong. Quality of cables and connectors are excellent. Stays cool and delivers smooth consistent power. Hassle free.

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

    Rated 4 out of 5 stars

    It's a corsair PSU

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

    A good PSU from a company known for making good PSUs. My one-and-only complaint is the included cables are the typical fish-net one-size-fits-all kind. I've got power connectors coming off my GPU I'm not using and the the 24-pin took a little more bending than I would've liked to keep pressure on the motherboard down. I would've liked to either paid less for just the unit and got cables separate, or paid a little more and got their black custom cables included instead. But by no means is it a deal-breaker, the included cables work.

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

    Rated 5 out of 5 stars

    corsair 850 gold power supply

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

    More than a enough power if you are gaming on mining. The price is ok you get what you pay for and nothing less. I game for 10 hours sometimes and no overheating. I have had this power supply for over a year now. I can recommend.

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

    Rated 5 out of 5 stars

    Great

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

    Great highly recommended works amazing highly recommend

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

    Rated 5 out of 5 stars

    850Watt

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

    Good psu, easy to install and comes with quality cables that are easy to work with.

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

    Modular Corsair Power Supply

    |
    |
    Posted . Owned for 10 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This power supply makes cable management so much easier because you can plug wires in as you go. Way better than having a bunch of cables all over the place.

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

    Rated 5 out of 5 stars

    Ultra reliable = Corsair

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

    Good reliable power source. Whenever i buy a new computer, the first thing i always replace is the power source. Never fails.....for me, that the factory installed power source in every new computer that I've ever purchased as died within 6 months to a year. I currently have a 9 year old Dell computer that is still running like a champ on the Corsair power source that i installed years ago.

    I would recommend this to a friend
  • Pros mentioned:
    Noise level, Performance, Power supply

    Rated 5 out of 5 stars

    Exactly as described

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

    This is exactly the psu I was looking for. High power, quiet, reliable, sturdy. The premium pro kit to use with this psu is nice, but I had no problem with the cables reaching through my pc

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

    Rated 5 out of 5 stars

    Good power supply

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

    Works great easy to cable manage. Powers a R7 3800 and msi 2070S no problem

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

    Rated 5 out of 5 stars

    Good Part - quick- from Best Buy

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

    Very good power supply. I am very happy that BestBuy stocks this part. My power supply went bad due to my experimenting, so getting the computer up and running with a new part as fast as possible was easy with BestBuy!!! Thank you

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

    Rated 5 out of 5 stars

    Solid PSU. Highly recommended.

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

    Corsair makes solid power supplies, and this one is no outlier. I do wish the included cables were more flexible, but I still highly recommend this one if you're not willing to pay for one of the fancy new ATX 3.0 PSUs.

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

    Rated 5 out of 5 stars

    Good modular power supply

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

    This power supply cable was pretty easy to install and the modular aspect of it was nice as well. I got this for $129.99 which seemed like a pretty good deal for a modular power supply of this level.

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

    Rated 5 out of 5 stars

    Title

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

    Works great easy install took 45 mins to do. Haven’t had a issue yet

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

    Rated 5 out of 5 stars

    Great PSU

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

    Amazing power supply at an amazing value. I got this on sale as a deal of the day promotion and decided to give it a try since I just upgraded from an RTX 3060 to an RTX 3070 Ti. It was delivered the same day which was nice. The power supply unit (PSU) was wrapped and outfitted with a plastic covering. The PSU is fully modular has a good size.

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

    Rated 5 out of 5 stars

    I like it

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

    It’s good. It powers computer. I want the gift card. I compel you to give me the gift card. This review will explode in 6 seconds

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

    Rated 4 out of 5 stars

    Works as intended

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

    Works as intended, no issues with it. Decent price for higher end simple pc setups

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

    Rated 5 out of 5 stars

    Great overall PSU

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

    Great fully modular power supply for general PC-powering needs. Good mid-ground for most systems, enough overhead to meet that best efficiency around 80% usage.

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

    Rated 5 out of 5 stars

    Would def buy for future builds.

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

    Nice modular, plenty of power, only use the wires you need.

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

    Rated 5 out of 5 stars

    Highly recommended by me.

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

    Great power supply unit to have, gives the confidence knowing that you don’t have to worry about having enough juice to power your PC.

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

    Rated 5 out of 5 stars

    Gotta grab corshairs psu

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

    Great performance. Was having problems with an old power supply and looked to pick this one up, and fixed the problem right up. Great performance, and amazing quality. Definitely recommend!

    I would recommend this to a friend