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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 1786 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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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 85 Showing 1,681-1,700 of 1,786 reviews
  • Rated 1 out of 5 stars

    Instant Return

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

    Was looking forward to this as it’s a refresh of the series, however the fan made a horrible noise as soon as it started spinning when in a game. Took it out to make sure nothing snuck in during install that could cause the sound, but everything looked fine. Used some air to spin the fan manually and low and behold, there was the a sound. Definitely seems like a faulty bearing, so it is being returned for a Seasonic GX-850.

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

    Great modular options

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    Posted . Owned for 8 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great little unit. Great value for the money. This is in a small rig of mine. Love the modular setup.

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

    Quality PSU

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

    A quality power supply is critical for any system and a corsair won’t let you down in this regard.

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    Awesome piece

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

    It gets the job done on my pc I would recommend it to anyone that needs to upgrade there power supply

    I would recommend this to a friend
    • Brand response from Corsair
      Posted .

      Hello Steve,

      What seems to be the problem? Please contact our team directly on our site at any time for assistance.

      -Art CorsairGaming

  • Rated 2 out of 5 stars

    Blew up on power-on

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

    Bad unit from factory blew up on power-on. Store had no replacements in stock. Since we were in a hurry, we accepted store credit on an upgrade which has worked perfectly. Good overall experience despite flawed product (from an otherwise excellent brand).

    I would recommend this to a friend
    • Brand response from Corsair Art
      Posted .

      Hi dirtnrocks,

      Sorry to hear that the PSU had issues out of the box, we'd like to help! Please reach out to our support team so we can work with you directly: support.corsair.com

      -Brian CorsairGaming

  • Rated 3 out of 5 stars

    Ju2je

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

    Not enough cables. Jejjrjjdjiejjrjtjkrokjrkorjrk Ok

    No, I would not recommend this to a friend
    • Brand response from Corsair Art
      Posted .

      Hi Jens,

      The PSU should come with all the necessary cables, which ones were you missing? Please reach out to our support team so we can work with you directly: support.corsair.com

      -Brian CorsairGaming

  • Rated 1 out of 5 stars

    DO NOT BUY THIS POWER SUPPLY!

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

    I’ve purchased two and should’ve learned my lesson the first time. I legitimately hate this PSU. Not because of its functionality - it works fine, but because the wires are absolute trash. This is a PREMIUM priced psu but contains the cheapest modular wire set you can possibly get. It’s like a kid getting a D in a class but still passing. They work but they’re horrible. They’re stiff and hard to work with and the PCIE connectors are monstrous looking. I spent an extra $45 on Amazon to get a set of 3 cablemod 8 pin pcie wires which fixes the problem, but my point is, at $150, there shouldn’t have been a problem to fix to begin with.

    No, I would not recommend this to a friend
    • Brand response from Corsair
      Posted .

      Hi,

      Sorry to hear about your experience. Your feedback is appreciated as we are always striving to improve our products. We also carry individually sleeved cable kits that provide a smoother experience, whilst being aesthetically pleasing. If you have any questions or concerns, please feel free to reach out: support.corsair.com

      -Albert CorsairGaming

  • Rated 2 out of 5 stars

    Does the job but flexibility of cord is terrible

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

    Only thing I bought for my build that I was disappointed with. They work as intended I suppose, but there is an awful still rubber wrap that they put about 1 inch away from the connector causing me to hardly be able to bend the cable.

    I would recommend this to a friend
    • Brand response from Corsair Art
      Posted .

      Hi Ramrod,

      Thanks for the feedback, if you have any further questions about the power supply, please feel free to contact our support team: support.corsair.com

      -Brian CorsairGaming

  • Rated 5 out of 5 stars

    THe best

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

    This works like wonders and I definitely brought two on the same day.

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

    A Real Powerhouse Power Supply

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

    Easy to set up and install with their flexible wiring harness.

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

    Great Product

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

    So far so good, would recommend for the 3080ti graphics card

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Many Downgrades, Higher Price

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

    Some of the connectors don't click in. It feels like a mushy connection. The selection of cables are a downgrade from the previous iteration. 2x CPU->3x CPU but 6x 8pin->4x 8pin, and 10x SATA->14x but 8x molex->4x molex. The quality of the box and packaging have been significantly downgraded. Flimsy box, less foam packaging for the PSU unit, and no reusable/resealable bag for the modular cables. And now it costs $5 more.

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

    Awesome PSU for the money

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

    2nd time buying an 850W. Using with my 3070 and no issues!

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Died within 6 months

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

    1st issue I have is the cpu cables being break apart 8 pin. My X570 board requires an 8 pin and 4 pin for CPU, and the way this power supply is set up you split apart one of the 8 pins, and because there's literally no slack or extra cable, the extra 4 pin just dangles there looking ugly. Second, it just died within a few months. With no warning. Went to power on the PC, and nothing. Just dead. Had to drive out to get a replacement so could use the PC. I'm not a hardcore gamer, nor does my PC get abused or overworked. No storms or surges. It just died.

    No, I would not recommend this to a friend
    • Brand response from Corsair
      Posted .

      Hi,

      Sorry to hear about your experience. The 8-pin CPU cable does not have to be split apart - though since it is already, you should be able to tuck it behind your motherboard tray and out of visibility. Considering our RMx PSUs carry a 10-year warranty, please get in touch with us - we'd be happy to get you a replacement: support.corsair.com

      -Albert CorsairGaming

  • Rated 5 out of 5 stars

    Good PSU.

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

    Great PSU. Love the modular design. No complaints.

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

    Rated 1 out of 5 stars

    Defective. Returned.

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

    Had to return product because it was defective. The only other option to not purchase the same product was the RM1000x, which is working well so far.

    No, I would not recommend this to a friend
    • Brand response from Corsair
      Posted .

      Hi RichiePoo,

      Our sincere apologies that the PSU was not working properly when you purchased it, we hope that the replacement is working without issue. If you have any issues that arise hereafter with the power supply, please don't hesitate to reach out to our support team, we'd be happy to assist in any way we can: support.corsair.com

      -Brian CorsairGaming

  • Rated 5 out of 5 stars

    Pc

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

    Excellent product and quality everything is perfect

    I would recommend this to a friend
  • 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.

    Great Power Supply and I Love the Power Out Put Co

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    3 cpu cables… why?

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

    Comes with three power cables for cpu but only 2 cables for pcie, my gpu requires 3 ports wanted to use three separate cables per plug but cannot with this power supply

    No, I would not recommend this to a friend
    • Brand response from Corsair
      Posted .

      Hi CoreyB,

      Thank you for your feedback. If you would like an additional 8-pin (6+2) PCIe cable, please feel free to get in touch with us, we'd be happy to help: support.corsair.com

      -Albert CorsairGaming

  • Rated 1 out of 5 stars

    Arrived dead

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

    Mine arrived dead. I hooked up my old supply and the computer fired right up. After searching the internet I learned this is pretty common with these, so I am going with a different brand.

    No, I would not recommend this to a friend
    • Brand response from Corsair
      Posted .

      Hello,

      This isn't very common with any of our units, please effect an exchange for a solution!

      -Art CorsairGaming