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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 1783 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

Pros mentioned filter

Cons mentioned filter

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 50 Showing 981-1,000 of 1,783 reviews
  • Pros mentioned:
    Power supply

    Rated 4 out of 5 stars

    Very good

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

    Power supply works great but you may need to buy additional cords depending on what graphics card you have.

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

    Rated 5 out of 5 stars

    Love it and it works perfectly!

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

    Love it works as advertised and would definitely purchase again on future build.

    I would recommend this to a friend
  • Cons mentioned:
    Size

    Rated 4 out of 5 stars

    Corsair Rm850x

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

    Straightforward and simple to install however was slightly smaller than most power supply’s I’ve used in the past.

    I would recommend this to a friend
  • 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.

    High-quality Corsair PSU. Fan runs very quiet - based on some reviews I'd seen I was expecting to be able to hear it. The cables are of decent quality although I think it's worth upgrading the ATX cable if you are looking to route it cleanly.

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

    Has Zero RPM Fan Mode

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

    At low and medium loads the cooling fan switches off entirely for near-silent operation, but once the action picks up, the fan activates, ensuring critical component temps stay in check. The chart on the Corasir site looks like it operates in this mode until your output is 340W, so don't start an RMA for it because you don't see the fan spinning!

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 4 out of 5 stars

    Works good, a little loud.

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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, pretty easy to instal. It didn’t come with a directional manual like some do, but I was able to figure it out.

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

    Rated 5 out of 5 stars

    PERFECT

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

    Power house unit! Definitely worth the extra 40$ I upgraded from the 750

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

    Rated 5 out of 5 stars

    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.

    Reliable product, requires a good size PC box for the cables.

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

    Dependable power supply

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

    I run a 3080 with ease on this power supply. No cons that I can think of

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

    Rated 5 out of 5 stars

    Great

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

    Love it, works great and looks great. One of my best purchase

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

    solid power

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

    I'm building a new pc and running a 3070 with the i9 10900k and my 450 PSU is not gonna be enough so I got this one and it's running great no major issues just the GPU power wires are kinda bulky with the piggyback wires since the GPU takes 2 connectors and won't work with just one wire and the piggyback i gotta runn 2 seperete wires and no so clean wire mangement

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

    Quality 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.

    Quality power supply. Good value for the money, and good wattage. Efficient unit too. Enough for an EVGA RTX 3080 FTW 3 Ultra with the 450W vBIOS, so it would be enough for even the new RTX 3090Ti. Only downside is that there's only 2 independent PCI-e power connectors coming out of the back, but EVGA and ASUS both say it's ok for their graphics cards with 3x PCI-e 8 pin connectors.

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

    Rated 5 out of 5 stars

    Powers a 3090 (barely)

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

    Powerful enough to handle a 3090 playing @ 4k144hz in accordance with an i7!

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

    Rated 5 out of 5 stars

    Great choice for mid to high end builds

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

    First powesupply bought for a custom pc build and so far its great!

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

    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.

    These are great power supplies. Have 2 of them and they work perfectly as expected.

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

    Rated 5 out of 5 stars

    powerful

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

    Very good quiet efficient power supply gives the 3080 ti all the juice it needs

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

    Rated 5 out of 5 stars

    Great Product!

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

    Amazing product did exactly what I needed it to super great!

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

    Rated 5 out of 5 stars

    Good buy for the wattage

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

    Excellent power supply! Very quiet. Easy to follow instructions. No issues yet.

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

    Rated 5 out of 5 stars

    Nice PSU

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

    Works flawlessly. Good quality power supply, I also like that it's fully modular.

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

    Rated 5 out of 5 stars

    Power

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

    Made this purchase when I upgraded to a 3080. Works great so far!

    I would recommend this to a friend