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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 1779 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 2 Showing 21-40 of 1,779 reviews
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    Power supply

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

    Perfect power supply. I have had zero issues with this power supply and I have had it for 2 years. I’m glad I don’t have to deal with any issues with power due to the fact that that’s what you need to work your pc

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

    Rated 5 out of 5 stars

    Most reliable and quite Power supply.

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

    Super quite fan and No power lagged. Power supply to motherboard is very fast.

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

    Rated 5 out of 5 stars

    Best price to performance 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.

    Honestly such a great product. My old power supply would give me issues but this one just works wonders!!!

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

    Rated 5 out of 5 stars

    3090 or bust

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

    This was a upgrade from a 6800xt. I’m happy to say while I like AMD product, their software isn’t the best. But nvidia man…this card just kicks the 6800xt to the curb. If you’re on the fence for a 3080ti or 3090. Do yourself a favor and spend the extra 200 for double the card. You won’t be upset.

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

    Rated 5 out of 5 stars

    easy psu upgrade

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

    First modular power supply even though I've been building PC's for close to 10 years. Install is easy and self explanatory, just use the cables you need!

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

    Rated 5 out of 5 stars

    No noise, no heat!

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

    You will not hear it! My new build is so quiet I can hear the silence ! My old psu was super loud and will run super hot so my room was like my sweat room, but not anymore!

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

    Rated 5 out of 5 stars

    So far so good

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

    Work well for me and everything I have stuffed into my gaming computer. I have a Asus ROG STRIX 3080 so I needed the 3 8pin connectors. https://pcpartpicker.com/b/zhPV3C

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

    Excellent PSU for my TrueNAS SCALE server build

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

    I purchased the RM850x for a new TrueNAS SCALE server build. It had all of the modular connectors I needed for the MOBO, PCIe GPU, 10 HDDs, 2 SSDs, and the fan header of the Fractal Design case. It's whisper quiet and even at moderate system loads I don't even think the PSU fan ever turns on. Other Corsair PSUs I have purchased have lasted for many years.

    I would recommend this to a friend
  • Best Buy Employee

    Rated 4 out of 5 stars

    Not my preferred still wonderful

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

    Welst not my preferred psu brand ive used this in a few budget/quick turn around builds and have had no issue with installation or its longevity i personally prefer seagate for its longer warranty

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

    ALWAYS buy Corsair PSU's

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

    Corsair is the gold standard for power supply. I've used Corsair exclusively for PSU since my first build a while back, never done me wrong, never had any issues at all, always had solid products. I've used the sf600, cx650m, rm750, rm850x white, rm850x in my recent builds and they've been great. No issues pushing my overclocked 3080 hybrid and overclocked 5600x and gives me room to upgrade to a 5900x and 3080ti.

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

    Rated 5 out of 5 stars

    The Corsair RMX850x80 PLUS Gold

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

    The Corsair RMX850x is an excellent power ! you won't be disappointed with this! worth !!!

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

    Solid PSU

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

    Great power supply makes my Desktop look cleaner and exceeds the power I needed.

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

    Rated 5 out of 5 stars

    Nice

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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 i owned super quiet. And do yourself a favor dont cut corners in a clean build.

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

    Rated 5 out of 5 stars

    Awesome power supply by Corsair

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

    This PSU worked great for me! It’s very silent and the wake-up speed is pretty good!

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

    Rated 5 out of 5 stars

    Great Power Supply for PC!

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

    Built a new PC and it works great! Would definitely buy again for another build

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

    Rated 5 out of 5 stars

    Excellence 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.

    Great item great power easy install all wires and power supply marked well

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

    Rated 5 out of 5 stars

    Excellent Product

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

    Excellent product works great, has little to no noising and does the job very well

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

    Rated 5 out of 5 stars

    The psu is the powerhouse of the pc

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

    Works great powering my pc havent had any issues! Great product.

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

    PC Builder

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

    Very excited to have purchased this for my sisters pc. Worked excellent and glad Best Buy had the product I needed in store, very likely to shop again. Helped power everything well inside her new pc

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

    Rated 5 out of 5 stars

    RM850x

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

    Excellent PSU! Been using Corsair for years. Absolute bedrock performance.

    I would recommend this to a friend