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Customer reviews

Rating 4.8 out of 5 stars with 318 reviews

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  • Value

    Rating 4.6 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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95%would recommend to a friend

Customers are saying

Customers enjoy the RMx Series RM850x power supply for its overall performance and quiet operation, with many appreciating the zero fan mode. The fully modular cables also make cable management easier, and the installation process is straightforward. With its adjustable fan and good modularity, this power supply is a popular choice for those needing ample power.

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 4 Showing 61-80 of 318 reviews
  • Pros mentioned:
    Noise level

    Rated 5 out of 5 stars

    Nice power supply

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

    So far, so good. I've used Corsair power supplies in the past and had good luck with them. I was happy to see the size of the fan as the larger fan is much quieter. The build that I used this in for reference is an asus main board with a Ryzen 7 9700x paired with an rtx 3080. I was able to add 7 140mm fans to the case for good airflow. Result is a system that is very quite and is really only noticable when gaming, and even then not as loud as the PC my son has. Overall I'm happy with the power supply and would recommend. If you want to run more than a single video card you may need a larger power supply. There are websites that you can use to virtually build your system and get an idea whether it will adequately support your planned system to both number of connections and wattage wise. A word of warning though for modular power supplies. Bag and tag your extra cables and mark for power supply. Some older Corsair cables that fit the slots are wired differently and can fry equipment if you use them

    I would recommend this to a friend
  • Pros mentioned:
    Cable management, Overall performance

    Rated 5 out of 5 stars

    For the new pc builder

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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 . Easy install for a new pc builder! Modular so you use what you need. Good fir cable management!

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

    Rated 5 out of 5 stars

    Great PSU and Great company

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

    Very nice power supply rates extremely well for protection on your computer from brown outs and consistency. 850w is more than I'll ever need. Corsair is a great company that stands behind their product as well. I had an old version that I had to RMA it was 6 years old and no question asked they sent a replacement. I really like this brand

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease

    Rated 5 out of 5 stars

    Pc upgrade must have

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy to install and fully modular, easy for anyone who hasn’t installed a modular before.

    I would recommend this to a friend
  • Pros mentioned:
    Overall performance

    Rated 5 out of 5 stars

    Great top tier PSU

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

    Great PSU after doing research I found this was a highly rated power supply. I really like the adjustable fan knob I put it at lowest setting so it's always running. It's replacing only a 3 year old EVGA PSU that went bad and was causing my PC to crash. After I installed the Corsair no more crashes!

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease, Noise level, Overall performance

    Rated 5 out of 5 stars

    It works

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

    Quiet, easy to install, no issues and best of all; it works

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

    Rated 5 out of 5 stars

    Great quiet 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. The manual fan knob is an interesting feature but if placement of the tower doeant make that accessible, its not very usable. The cable management is great with the fully modular design. Very quiet as well.

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

    Rated 5 out of 5 stars

    Great solid and quiet.

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

    I have been a corsair power supply guy for several years now. I was initially a EVGA guy but made the jump over and so far haven't gone wrong. I end up buying this unit for the new nvidia power connection. Stored the previous RM850e I had as a backup or for when I upgrade the wife pc in the future. This power supply is powering a 7800x3d, 32gb of ddr5 on a Asus B650e board, asus tuf 5700ti and all the other usual stuff.

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

    Rated 5 out of 5 stars

    solid power

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

    ATX 3.1 power standard from Intel, RMx PSUs have the connections needed to power today’s demanding PC hardware including a native 12V-2x6 connector. 100% Japanese 105°C-rated electrolytic capacitors deliver fantastic electrical performance, while a 140mm FDB fan provides low noise cooling. Backed by a ten-year warranty, RMx PSUs are the gold standard for many years to come.

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

    Rated 5 out of 5 stars

    Power Supply unit

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

    Was having trouble with my desk top crashing all the time. Then i bought a new graphics card and had Bestbuy install it. They advised me I needed a new power supply unit to support the new graphics card. I agreed it was necessary to run my new Cinema 4d app. They installed itand I have not had a single crash since that. Very happy guy today

    I would recommend this to a friend
  • Pros mentioned:
    Cable management, Overall performance

    Rated 5 out of 5 stars

    Very nice PSU.

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

    Very nice PSU. Like the nicely finished cables with separators. Had a little "new" smell with first use under power, but that went away quickly. All in all, I can recommend this PSU.

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

    Rated 5 out of 5 stars

    Power Flex!!

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

    This thing is a beast. It is crucial for my pc, which is fully decked out with Corsair. I have 10 Corsair fans, 128 GB of Corsair RAM, and a Corsair AIO cooler. Other Corsair peripherals that I have are a Corsair XL Extended mouse pad, a Corsair wireless charging pad, which is used to charge my Corsair mouse! This PSU is a must-have!! Try it out for yourself! Corsair never disappoints!

    I would recommend this to a friend
  • Pros mentioned:
    Cable management

    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.

    Got this unit for a new PC build. I have used Corsair products before and never had any issues. This new power supply is great as it is totally modular and you can use only the cables that you need leading to a cleaner look and easier cable management. Would definitely buy again.

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

    Rated 5 out of 5 stars

    Absolute beast

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

    After adding all my peripherals and other drives my original PSU was having a hard time. Picked this up and installed it super easily and ive had 0 issues with it so far and even upgraded my gpu and still haven't noticed any issues

    I would recommend this to a friend
  • Pros mentioned:
    Cable management, Overall performance

    Rated 5 out of 5 stars

    Quality 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.

    Running a RTX 3060 video card and this run its beautifuly. Also really like the clean look of the wiring. Makes it easy to route and manage.

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

    Rated 5 out of 5 stars

    Good quiet clean PSU

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

    Extremely quiet, runs good with no visible issues. The fan knob is a little pointless as 99.9% of the time you will just leave it on automatic and it will only turn on when it's hot.

    I would recommend this to a friend
  • Pros mentioned:
    Cable management, Overall performance

    Rated 5 out of 5 stars

    Works great. Makes setup much easier.

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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. No issues keeping my custom pc running and the modular cables made putting my pc together much easier. No complaints so far.

    I would recommend this to a friend
  • Pros mentioned:
    Installation ease, Overall performance

    Rated 5 out of 5 stars

    Reliable

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

    it’s been running pretty well so far :) and was easy to install

    I would recommend this to a friend
  • Pros mentioned:
    Cable management

    Rated 5 out of 5 stars

    Very nice

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

    Easy to setup. Nice modular PSU & nicely labled cables. Wish there was a manual to explain what is what and where is for why.

    I would recommend this to a friend
  • Pros mentioned:
    Cable management

    Rated 5 out of 5 stars

    Reliable 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.

    The included cables are a cleaner design than older versions. The adjustable fan option is fine if you're worried about wear on the bearings with starting and stopping. Well tested and reviewed unit.

    I would recommend this to a friend
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