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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 1782 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

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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 20 Showing 381-400 of 1,782 reviews
  • Pros mentioned:
    Power supply

    Rated 5 out of 5 stars

    Great power supply for the cost

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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 a very good power supply, it is the second I have purchased. I am still using my original, this one was for another computer build for my son. Quiet and efficient.

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

    Purchased this 850w PSU to upgrade from a 650w. This 850w PSU was completely silent, had a better power and efficiency rating, and I would recommend this power supply for any new builds using a 3080 or lower GPU. If you have a 3090 TI, I would recommend getting a larger PSU from Corsair.

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

    Rated 5 out of 5 stars

    Great product!

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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 to install getting my bang for the bucks

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

    Easy to install

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

    I thought it was going to be hard to install but not to bad the price is good but theres no instruction manual in the box don’t really need one because it’s all labeled

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

    It’s a Corsair Psu, you can’t go wrong.

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

    My first PSU and I hope this last me for years. I got in on sale for about $110. It’s pretty plug and play and in my case it’s pretty hidden. I’ve noticed it’s a bit bigger than some ATX power supply and while that’s a bit of a non issue for me (I plan to use my case for the next 5 years) it could be an issue on any future builds you want to do. Overall I like this PSU and hope that it last me for a good while

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

    Rated 5 out of 5 stars

    Outstanding

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

    Works wonders I highly recommend. No issue install was easy as pie.

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

    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.

    Had a bit of trouble with my old Power Supply it would keep turning off on me because it was too low but this one is perfect it was it to install and had no issues I wish I’d have started out with this one !

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

    Rated 5 out of 5 stars

    Cosair is great.

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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.

    What can I say? Corsair is great. This is a good value and should provide all the headroom you need for those new power-hungry graphics cards.

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

    Rated 5 out of 5 stars

    Corsair 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.

    Standard Corsair quality. As with most power supplies these days, easy to install. More than enough cords supplied to meet my builds needs.

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

    Rated 5 out of 5 stars

    Amazing PSU

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

    Works excellent for my new set up. I recently had to upgrade from a 600w power supply because it was giving me problems. This one works beautifully. I couldn’t be happier with my purchase

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

    Rated 5 out of 5 stars

    Great purchase!

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

    Bought this for our sons gaming computer. They have worked well for his games.

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

    Rated 5 out of 5 stars

    Always purchase a reputable power sp brand

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

    Great product no looking back, i had to upgrade to 1000 watts and kept same brand. These new gpus and cpus are power hungry, and other devices/ storages need multiple satas. So, the more power wattage i can invest in or add and extra 200 watts to have sufficient power delivery. A slight overpriced.

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

    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.

    After my new computer died due to a factory mistake, I was forced to replace my power supply - among other parts. This one came recommended, and has been fantastic so far!

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

    Rated 5 out of 5 stars

    Good PSU price and specs

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

    This battery supply works well with my newly built PC with my 3060 ti GPU and 2 32gb Ram, I find running games and other demanding applications not hard at all.

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

    Rated 5 out of 5 stars

    Great PSU

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

    I bought this for my Ryzen 7 build. Not a whole lot to say about it, which I think is good for a psu. It is fully modular which I think is a requirement these days. I have aftermarket cable extensions on it and they work flawlessly with it. I’ve had Corsair psu’s going back 14 years and have never had an issue. Would recommend!

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

    Great go to PSU

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

    Great build quality, reasonable price, and high in the PSU cultist list. However, I do wish that this PSU was less than 140mm in lenght so it could used in SFF cases with full sized 300mm and up GPUs.

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

    Rated 4 out of 5 stars

    Good PSU

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

    Never had any issues with this power supply. Couldn't even hear the fan at load.

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

    Rated 5 out of 5 stars

    Great PSU

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

    All of my pc builds that have used a Corsair power supply have never had any issues with them. I will alway recommend a Corsair psu for your build!

    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.

    Corsair is a great PSU vendor. I recently made a new PC build, so I went with them again. If you are upgrading an existing build most cables will be compatible, just keep an eye out on the motherboard / CPU power connectors as those might not be. Works great for a 6800 XT

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

    Rated 4 out of 5 stars

    Read before you pair with EVGA 3080ti FTW3

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

    I’m new to the PC world. I upgraded my 2060 to 3080ti. Needed to upgrade my PSU because it was only 500W. This product is great overall, but the 2021 version removed the 3rd PCIE cable. That made it difficult for me in particular because my 3080ti FTW3 needs 3x8 pins PCIE. I could have bought another one but couldn’t find a standalone 8 pin connector from Corsair. I also received advice to not buy a different brand PCIE cable than the PSU. I decided to return this product and go for Seasonic Focus GX-850W, it came with everything.

    I would recommend this to a friend