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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 1785 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 59 Showing 1,161-1,180 of 1,785 reviews
  • Rated 5 out of 5 stars

    Great Value and Price

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

    Bought this since my old mother board died and I wasn't sure if it was the power supply or not. This power supply has a lot of outlets for different configurations of computer peripherals. This was a perfect match for my case.

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

    Corsair 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.

    It is a really nice product. It complete helped me to make my build easily.

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

    Price to performance king

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

    I only trust my systems to the best power supplies. This is one of the best. Corsair does not disappoint with their power ratings. This unit produces 850w of clean power and an efficiency rating of gold, it truly meets my performance to cost bar.

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

    Power support for computer

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

    Worked great definitely recommend, installed and got my computer back up and running

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

    Perfect

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

    Absolutely 0 issues with the perfect cable length on my Mid-sized case build.

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

    Survived A Surge

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

    My RGB controller decided to smoke itself, thankfully, this power supply remained stable and continues to run without issue after that blip. Will continue to monitor but I’m happy so far.

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

    Quality PSU.

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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.

    This is a solid PSU as usual from Corsairs RM(x) series PSUs. It also features a MagLev Fan which fingers crossed, should last a very long time. This was a big deciding factor in why I chose this PSU.

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

    Love this power supply and it's highly reviewed.

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

    One of the best reviewed/tested psu's out there. The fact they added the mag lev fan to it just made me switch from my old Seasonic to this and so far it hasn't disappointed. Fan hardly ever turns on unless your doing heavy work or gaming.

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

    Rated 4 out of 5 stars

    Corsair

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

    It works cause corsair works. It can power a 3080 for sure

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

    Great PC PSU!

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    Posted . Owned for 7 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great Power supply. Does the job that i need it to do. Just the right amount watts I need.

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

    Corsair isna great brand.

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

    Great Power Supply for your Gaming Pc! You cant go wrong with Corsair. Always great Products.

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

    Works fine

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

    Worked as expected. Bought to replace an under performing PSU.

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

    Rated 4 out of 5 stars

    Excellent 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.

    Great psu for the money, fits well, and you can trust Corsair.

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

    Computer gaming

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

    You guys are amazing thank you for everything you guys have done for me.

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

    Great PSU

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

    Extremely nice quality PSU, works wonderfully, couldn't be happier!

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

    Corsair power supplies awesome

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

    One of the best power supplies on the market, but a bit pricey. Thank you BB for putting it on sale.

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

    Love Corsair and their quality Products.

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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.

    Perfect. Powers my new build with no issues, Ryzen 7 5800x, Asus ROG Crosshair V III, Corsair H150 AIO, XFX amd Radeon RX 6700XT, and other peripherals. Cables are great quality and easy to run in my Corsair 5000D airflow.

    I would recommend this to a friend
  • Rated 3 out of 5 stars

    CABLES ARE A PAIN, but the PSU is great.

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

    Look, so far this thing is awesome. But... those reviews complaining about cables? Yeah the cables are not great and it's obvious why. I had no issues with length, but the capacitors built into the wires (I assume that's what they are, as prominent review sites complain about this) makes the wire ROCK SOLID IMPOSSIBLE TO FLEX/BEND a couple cm from the end. So it's REALLY an unneccessary struggle to wire your MB (CPU was THE WORST offender, though the 24pin to the MB was so fat it really fought me trying to fit it through a Corsair 5000D cable management port. Seriously, their own case could barely handle this.) Why is it obvious? Because for ONLY $110 you can buy their premium cables. Ugh. I'd highly recommend it though I have not. I replaced a DOA EVGA PSU which had 2 dedicated power cables for the GPU (this Corsair only has daisy-chained ones which makes wiring ugly) and all cables were far more manageable. The PSU would be a solid 5/5 if they didn't make intentionally brutal cables in order to sell premium cables for NEARLY THE COST OF THE PSU... ($130 for a PSU, then $110 to replace the cables? Ugh)

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

      Hi GAWDZIRRA,

      Thank you so much 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

    Would buy again.

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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.

    This is a great power supply works perfect I was only planning on using it for a few months but been going for years now.

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

    Awesome but...

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

    Great brand, always quality products. However, after a year and a half it quit working. When It comes to power supply units, just stick with thermaltake. I have a 1200w in a pc i built in 3012 still goong strong.

    I would recommend this to a friend