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45575 Dulles Eastern Plz
Ste 188
Sterling, VA 20166
Opens at 9 am
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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 1 Showing 1-20 of 1,846 reviews
  • Pros mentioned:
    Modular, Noise level

    Rated 5 out of 5 stars

    Quiet and powerful

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

    Installation was quick and trouble free. The fan on the PSU is whisper quiet and sometimes completely silent. Modular design makes cable management much easier and frees up valuable case room.

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

    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.

    Fully modular power supply for a high end build. The psu cables are very study and well built. Make sure to bend the cables according to your case before plugging in. Ample pcie connectors and dual cpu connectors for overclocking

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

    Rated 5 out of 5 stars

    amazing 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, reliable, silent. Other than the fact that it is a bit overkill for my system, it is amazing. Have had it for a few days, no issues so far :) and the 10 year warranty, makes me believe it will stay the same.

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

    Rated 5 out of 5 stars

    Great Power Supply

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

    Great power supply, quiet. The modular cables make for a clutter free case. i want to build a second system now. Plenty of power to run our 2070 Super RTX.

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

    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.

    Amazing product. Put this in my brand new build, great quality, figment, the cables are really nice.

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

    Rated 5 out of 5 stars

    Excellent power very quiet

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

    I upgraded my machine and bought this Power Supply I have no complaint looks good runs even better quiet and plenty of power

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

    Rated 5 out of 5 stars

    Great PSU

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

    Great PSU. I have it for my ryzen 7 3700x and my EVGA RTX 3080 ftw3. The fan is very quiet, it provides enough power to my system. I would totally recommend this product, solid build, and high quality product.

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

    Rated 5 out of 5 stars

    What a power house...

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

    Plenty of power for the new pc build. Ryzen 7 3700x, Corsair vengeance 3600 32gigs, 2 TB Samsung EVO 980 SSD, 8 TB seagate barracuda HDD, plus all the RGB one gamer can handle. I’ll let you know how it handles all that plus the RTX 3080 once bestbuy figures out how to stop the bots from buying up all the limited stock.

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

    Rated 5 out of 5 stars

    Good, Modular PSU

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

    Solid PSU overall. Only thing I wish it had was a silent mode switch, but I don’t think the fans have ever really come on and even if they did, my CPU fan and case fans likely were louder so it wouldn’t even matter. Otherwise, it’s a good PSU and the fully modular aspect is great. Case is a Corsair 4000D Airflow for size and fitment reference in the photo.

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

    excellent

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

    i got this to power a moderate system no cd/dvd drives and no standard HDD either just an i7 9700k, Gigabyte aorus pro wifi, 16gb Vengeance DDR4 3200, dual samsung 970evo plus NVME m.2 500gb ea with a MSI RTX 2070 in the gorgeous Cougar Panzer EVO RGB runs everything with out breaking a sweat

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

    Great PSU

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

    Unless you’re running multiple gpu’s or something extraordinary this is the bes psu for the price, a little high wattage sure, but if you’re planning to overclock is perfect, also you’re future proofing in case you update your pc you wouldn’t need a new psu.

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

    Rated 5 out of 5 stars

    Corsair is top quality!

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

    Installation was a breeze. No issues whatsoever. Very quiet while running. Very high build quality.

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

    Rated 5 out of 5 stars

    Nice PSU

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

    Very happy with this product. Feels and looks like a premium power supply.

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

    Quiet, solid, meh cables.

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

    Quiet, high quality, would prefer if it came with braided cables but I had some from a different Corsair PSU that work. Runs a 10850k, 3070, and 4 dimms of ram all Overclocked without issue.

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

    Good 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 install, can’t wait to use it in my new pc as it will be used really nicely with my new gpu

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

    Fantastic

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

    This thing is an absolute unit and with the my best buy pricing it brings the price to lower than some other competitors. You get the Corsair quality and their great warranty. I bought it to use with my new 3080 and it came well packaged and with a nice bag for all the included cables.

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

    Power without the cost of Sound

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

    Bought this to power my i9 900k, RTX 2070 Super gaming rig. Have yet to have any hiccups as Corsair is a trusted and very established brand. Quiet too.

    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.

    I’m a PC builder since 2004 and I will recommend this power supply! I run i9 10900k now and RTX3080 and and 32gb 3600 works amazing

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

    Rated 4 out of 5 stars

    Got it when it was on high price

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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.

    I have been using it for 2 years now. This PSU works great with a little issue to the one I got lol. But overall it’s a great PSU I upgraded from a 650w to this 850w for my 3080ti

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

    Can handle a lot

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

    So far this thing has been a beast that has handled all my high-end parts perfectly. My PC specs include Ryzen 9 5950x and RTX 3090 Gigabyte OC Vision.

    I would recommend this to a friend
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