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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

Pros mentioned filter

Cons mentioned filter

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 27 Showing 521-540 of 1,846 reviews
  • Pros mentioned:
    Power

    Rated 5 out of 5 stars

    Great product.

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

    Great power supply. I was reluctant to buy it, because I didn't think it sourced enough power for my two 1080 ti GPU's. it does with room to spare. The price was great too.

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

    Rated 5 out of 5 stars

    Quality PSU!

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

    Strong quality PSU. I use it for mining and power 4 gpu's without a problem. I do wish they had more PCIE cables but it does what I need it to.

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

    Rated 5 out of 5 stars

    Plenty of Power and Works

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

    It came with many cables I didn’t need (not a bad thing), doesn’t seem to run the fan very much, and the cables themselves are very inoffensive if not a little boring.

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

    Rated 5 out of 5 stars

    Pure Power

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

    This thing is a beast. I got it for a great price at Best Buy. I would highly recommend this power supply. Comes well packaged with tons of cable options, even molex.

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

    Rated 5 out of 5 stars

    Great Power Supply

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

    This was my first fully modular power supply. Installation was straight forward. My case is large and the cords routed sufficiently in to the rear backspace and back to the main body.

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

    Rated 5 out of 5 stars

    Gold Standard

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

    Top Tier PSU at affordable price. Comes with 3 dual pci-e cables and the cpu / pci-e plugs are interchangeable. Handy when you need as many pci-e plugs as possible.

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

    Rated 5 out of 5 stars

    Great power supply for any build

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    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy to install and comes with more than enough cables. I have several left over after my install. Been using for around 6 months with no issues at all.

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

    Rated 5 out of 5 stars

    Very nice 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.

    I have 2 evga supernova 850w as well and gotta say. The fit and finish on this corsair psu is even better than them. Reliable, stable and nice looking psu

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

    Rated 4 out of 5 stars

    Fully modular 850x Corsair PSU

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

    Quiet and more than enough juice for a 10850k setup.

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

    Rated 5 out of 5 stars

    Power supply

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

    Really great and reliable powersupply. I currently have this ps in my pc and have had no issues for the past few years I have had it for.

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

    Rated 5 out of 5 stars

    Standby

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

    Have not used yet. Bought to have as standby. Have had failures with other brands including almost a fire. I believe Corsair is best and has silent mode on fan

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

    Rated 5 out of 5 stars

    Best 850Watt Unit Ever

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

    Corsair's Quality on Power supplies just keeps me shocked. They arent that much more or less than any others on the market but they keep your system up and going.

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

    Rated 5 out of 5 stars

    Corsair

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

    Ordered this to replace my power supply from 10 years ago. My old Corsair Psu didn’t die just thought maybe it’s time to upgrade everything all at once.

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

    Great Power Supply

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

    This fully modular power supply from Corsair is very quiet and efficient. Some of the 8-pin connectors split in half to create a 4-pin connectors, while other 8-pin connectors split into 6-pin connectors.

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

    Rated 5 out of 5 stars

    COSAIR RM 850X

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

    THIS IS ONE OF THE BEST PSU ON THE MARKET IN THIS PRICE POINT. IT'S QUIET POWERFUL AND RESERVE. IF YOU NEED A PSU IN THIS PRICE POINT YOU CAN'T GO WRONG WITH ONE OF THESE.

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

    Rated 5 out of 5 stars

    Good to go

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

    Awsome PSU. This provides ample power for my needs. Simple, clean installation. Like all the cables that came in custom Corsair bag/pouch. Made installation easy!

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

    Rated 5 out of 5 stars

    High Quality , low noise and runs well 850W PSU

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

    I bought this 850W Gold PSU to to future proof my PC, when and/or IF I can actually get a 3080 GPU. At the moment it can handle all the RGB, RAM and CPU power .

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

    Rated 5 out of 5 stars

    Great 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.

    Great power supply, all necessary cables are included in the box. A bag to hold all of the cables is also included. The silent fan makes the PSU not audible at all.

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

    Rated 5 out of 5 stars

    Easy to install modular PSU

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

    Love this modular PSU. Very quiet and included cables aren’t mustard colored. Now if only NVIDIA would get their crap together so I could fill this empty PCIE slot that.

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

    Modular design is a must have.

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

    The Corsair RMX 850W power supply was a direct replacement for my old Corsair 500W unit. Beyond simply increasing the power buffer for my computer, this new unit's modular build eliminated the obnoxious unused cords that infested my old pc. Paired with colored cable extenders (highly recommended for any pc build), this new power supply speaks for itself so far as robustness and practicality. To anyone looking to upgrade the power supply on their computer, I recommend two features that this power supply has which are a must have on any power supply: 1. Gold or Platinum certification. 2. Fully-modular cable units.

    I would recommend this to a friend