Last-Minute SavingsLimited quantities.Shop now

Skip to content
Gift Ideas
Main Content

Customer Ratings & Reviews

No content
  • Front. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 11. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 12. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 13. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 14. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 15. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 16. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 17. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 18. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 19. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 20. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 21. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 22. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 23. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 24. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 25. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 26. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 27. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 28. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Alt View 29. CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black.
  • Step-by-Step Instructions to Build a PC video 6 minutes 35 seconds
  • CORSAIR How to Build a PC - How To Video video 1 minutes 34 seconds

CORSAIR - RMx Series RM850x 80 PLUS Gold Fully Modular ATX Power Supply - Black

Model:
CP-9020200-NA
SKU:
6459244
Highly rated by customers for:
Your price for this item is $149.99

Customer reviews

Rating 4.8 out of 5 stars with 1783 reviews

Rating Filter

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 30 Showing 581-600 of 1,783 reviews
  • Pros mentioned:
    Performance

    Great power

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

    Does the job, running a b450m, zotac gpu, ryzen 7 3700x no issues

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

    A work horse

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

    Wonderful Power Supply, suits needs, and has been running for a while, no issues

    I would recommend this to a friend

  • Worth it!

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

    All i needed and more to grow. Great price too. Well packaged with all cables needed.

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

    Reliable, quality power

    |
    |
    Posted . Owned for 11 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Reliable, quality power. Self built pc using this pc hardly ever giving me problems. Recommended.

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

    Power Supply Corsair

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

    Great power supply period it does the job and does it well.

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

    CORSAIR PSU

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

    Quietest PSU I’ve ever had. Super reliable and good price to proformace

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

    Great PSU

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

    Great PSU, I love the fact that it is fully modular even the mobo cable. I have used several Corsair PSUs and never been disappointed.

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

    Clean Power.

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

    Needed extra power for my overclocked i7-3970x and 980 ti Classified. These are very power hungry components compared to more modern CPUs and graphics cards. This fit well in my case and has plenty of power.

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

    Good for me

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

    Awesome power supply, enough for my 7900xtx and has enough ports so I don’t have to daisy-chain it.

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

    Working as it should

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

    Nothing to complain. Put it into the machine and everything is good.

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

    Great Power Supply

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

    Got this power supply in anticipation for whenever I can get an RTX 3080 or 3090. The gold is perfect to get the power you need and not waste a lot of energy. I don't think you need to go higher than gold.

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

    Needed modular psu for saving space

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

    Comes with everything needed for running 3090 ftw3 even under full load the fan is quite as well.

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

    much needed for high end graphics cards

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

    made a big differance with my gameing machine so my system was not starved

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

    Awesome psu

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

    great psu works great for runnngn a decent gpu and any cpu u can throw at it and its modular and has a zero-rpm fan

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

    High Quality & Quiet

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

    Extremely quiet. Had to upgrade due to replacing my 1660ti with a 3070ti and while my 750w could handle the card it had to spin its fans up really loud.

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

    Good power supply

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

    Great power supply for the money runs my pc excellent and will run almost everything!

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

    Corsair Power

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

    Easy install, plenty of cables to connect everything and Works great!! Very Quite!!

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

    RM850 Power Supply

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

    Excellent quality and runs quietly, I expected nothing less from Corsair!

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

    SUPPLY

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

    GREAT POWER SUPPLY, EASY TO INSTALL NO ISSUES. ALWAYS A GOOD CHOICE WHEN USING CORSAIR PRODUCTS.

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

    Quality psu

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

    I always buy Corsair psu’s because of the outstanding quality. Compared to other brands with exploding power supplies, I’m glad I don’t have to worry about that with this company.

    I would recommend this to a friend
Page 30, Showing 581-600 of 1,783 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2025 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.