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Customer Ratings & Reviews

Your price for this item is $72.49
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The comparable value price is $144.99

Customer reviews

Rating 4.8 out of 5 stars with 1846 reviews

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Rating by feature

  • Value

    Rating 4.6 out of 5 stars

  • Quality

    Rating 4.8 out of 5 stars

  • Ease of Use

    Rating 4.7 out of 5 stars

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96%would recommend to a friend

Customers are saying

Customers are pleased with the RMx Series 850W power supply's ample power, modular design, and quiet operation. Many appreciate the high-quality components and easy installation. While some users reported an audible coil whine, the majority found the unit to run cool and efficiently. The positive feedback on quality and ease of use outweighs the relatively few negative comments.

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 33 Showing 641-660 of 1,846 reviews
  • Pros mentioned:
    Quality

    Rated 5 out of 5 stars

    Corsair!!!

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

    Works great with my rtx 3080, along with the rest of my system. Corsair makes quality products across the board. Can't go wrong

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

    Rated 5 out of 5 stars

    Good PSU

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

    Quiet, efficient and fully modular. What else do you need? No issues powering 5800x and 3080 TI.

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

    Best ever

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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.

    best power supply i have owned!! works with the corsair i cue program super easy to set up and dont need to have the unneeded cables!

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

    Rated 5 out of 5 stars

    Workhorse

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

    Workhorse of a power supply. Corsair continues to make an excellent product. Modular pretty much makes it fit everything.

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

    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.

    So far, so good. Powers all of my components and doesn't make any weird noises. Plenty of overhead for my 5800x/3090 build.

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

    Rated 5 out of 5 stars

    Excellent power supply - quiet fan

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

    Super quiet fan. All the modular cables you need and more with a nice storage pouch for the extras. Plenty of power for GPU heavy builds.

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

    Quality Modular Power Supply

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

    Used this in my first desktop build. Very happy with the modular cables and apparent quality of the power supply. In my research before purchase, the x series of Corsair seemed to always come up as highly rated. While I can't speak for the longevity of the power supply due to the time I've owned it, I can say the modular cables and setup have worked well during the build. The supply power of the 12V and 5V is consistent based on the benchmarks that I've done testing the new build. Overall I'm happy with the power supply and would buy again.

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

    Rated 5 out of 5 stars

    Great and solid 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.

    Excellent product! It is worth the extra money. I alsa recommend you to buy the 850 instead of the 750 since it is only 10 bucks more

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

    Rated 5 out of 5 stars

    great quality for your money

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

    Best bang for your buck, shipped promptly and arrived on time. They 850 gave me some wiggle room on my ratting. 10 out of 10 would buy again.

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

    Rated 5 out of 5 stars

    Solid modular 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.

    The power supply is a power supply. It does the job with no issues. I love the modularness as I was able to keep out cables I didn't use.

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

    Efficient, Quiet, and Stable

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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 RM850x is a solid choice for PSU. It is efficient, quiet, and stable. I used it with my overclocked 8086k + GTX 1080.

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

    Rated 5 out of 5 stars

    Excellent PSU!

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

    Premium power supply. I have had consistent, clean power delivered to an RTX Titan with no issues. Not too loud either!

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

    Rated 5 out of 5 stars

    works great

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

    probably more than I needed but works great. pc still gets a little warm, I just remove side panel for periods of time. good deal, good price

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

    Rated 5 out of 5 stars

    Great PSU

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

    Solid power supply with no issues. Power my system Ryzen 5900x, RTX 3700 FE, X570 Tomahahawk, and G.Skill Trident Neo 16gb.

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

    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.

    Great PSU especially for my new build which requires a lot of power. Corsair is known for good PSUs so this is a solid choice.

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

    Rated 5 out of 5 stars

    Great product

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

    Very stylish power supply, and quiet during idle . Highly recommend this modular power supply as it can help with cable management.

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

    Rated 5 out of 5 stars

    Corsair RMX 850

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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 power supply is really good running my 10900k and a 3070 very well would really recommend this to anyone building a pc

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

    Rated 5 out of 5 stars

    Quiet powerful psu

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

    Needed to upgrade my power supply for the RTX 3000 series graphics cards, and this one has worked and given me no problems so far.

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

    Rated 4 out of 5 stars

    Works great with video cards that demand high powe

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

    My son bought a PC to play video games. We upgraded the video card and the power supply that came with the PC was not keeping up with the power needed. The geek squad recommended replacing it with this product. It works great. Zero problems. I still have some extra power in case I want to update accessories.

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

    Rated 5 out of 5 stars

    Great product

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

    Great product love the fully modular part of this power supply simply to installs and keeps the cable management clean

    I would recommend this to a friend