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CORSAIR RM Series (2021), White, RM850, 850 Watt, 80 Plus Gold Certified, Fully Modular Power Supply

4.8 4.8 out of 5 stars 1,627 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Computer Power Supplies by Corsair

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White
850 Watt
RM

Purchase options and add-ons


About this item

  • Fully modular, so you only connect the cables your system needs.
  • Triple EPS12V connectors for full compatibility with modern graphics cards and motherboards.
  • A 140mm rifle bearing fan with a specially calculated fan curve ensures that fan noise is kept to a minimum, even at full load.
  • Zero RPM fan mode for near-silent operation at low to medium loads.
  • Industrial-grade, 105°C-rated capacitors deliver solid electrical performance and reliability.
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CORSAIR RM Series (2021), White, RM850, 850 Watt, 80 Plus Gold Certified, Fully Modular Power Supply
CORSAIR RM Series (2021), White, RM850, 850 Watt, 80 Plus Gold Certified, Fully Modular Power Supply
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Price$139.99$249.66$221.90$191.00-14% $119.95
List:$139.99
Delivery
Get it as soon as Monday, Apr 1
Get it Apr 1 - 3
Get it Apr 1 - 3
Get it Mar 29 - Apr 2
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to install
4.5
4.5
4.5
4.5
4.4
Noise level
4.4
4.6
4.6
4.6
4.5
Energy efficiency
4.3
4.6
4.6
4.6
4.5
Value for money
4.3
3.6
3.6
4.3
4.2
Quality of material
4.1
4.3
4.2
Sold By
Amazon.com
NoodleTech (SN recorded)
NoodleTech (SN recorded)
GeekTown (Daily Expedited Shipping) ✅
Amazon.com
power supply design
Full Modular
Full Modular
Full Modular
Full Modular
Full Modular
connector type
PCI Express
ATX
ATX
PCI Express
EPS
form factor
EPS12V
ATX
ATX
ATX
cooling method
Air
Air
Air
Air
Air
system bus connector
8 Pin
4 Pin
4 Pin
fan count
1
1
1
1
1

From the manufacturer

GOLD-CERTIFIED QUIET POWER

CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies with multiple EPS12V connectors deliver consistent 80 PLUS Gold efficient power to your PC and have all the connections needed to power today’s most demanding PC upgrades.

AVAILABLE IN BLACK OR WHITE

Going for a stealthy look or modern minimalism? RM Series PSUs are available in black or white variants to fit your build style.

TUNED FOR LOW NOISE OPERATION

A 140mm rifle bearing fan with a specially calculated fan curve ensures that fan noise is kept to a minimum, even at full load.

HIGH EFFICIENCY

With upwards of 90% peak efficiency, RM produces less noise and less heat, which means less time worrying and more time gaming.

FULLY MODULAR WITH MULTIPLE EPS12V CONNECTORS

Completely modular cables means you only connect the cables your system needs, and the wide range of included cables adds broad compatibility with modern graphics cards and motherboards.

Also compatible with the CORSAIR 12-pin GPU power cable for the hottest new GPUs.

ZERO RPM FAN MODE

At low and medium loads the cooling fan switches off entirely for near-silent operation. Once the action picks up, the fan activates, ensuring critical component temps stay in check.

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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CORSAIR

CORSAIR RM Series (2021), White, RM850, 850 Watt, 80 Plus Gold Certified, Fully Modular Power Supply


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Product Description

CORSAIR RM Series Fully Modular Ultra-Low Noise Power Supplies deliver consistent 80 PLUS Gold efficient power to your PC. With triple/dual EPS12V cables and four PCIe 8-pin power connectors, RM PSUs have all the connections needed to power today’s most demanding PC upgrades. Industrial-grade, 105°C-rated capacitors deliver superb electrical performance and reliability, backed by a ten-year warranty.

Customer reviews

4.8 out of 5 stars
4.8 out of 5
1,627 global ratings

Customers say

Customers like the quality, appearance and noise of the system power device. For example, they mention it's extremely well built, looks really good and is virtually silent. That said, some are happy with cables and ease of installation. That being said, opinions are mixed on performance and power supply.

AI-generated from the text of customer reviews

24 customers mention24 positive0 negative

Customers are satisfied with the quality of the power supply. They mention it's well-built, has good cables, and is reliable. Some say that the solid construction and the fact that it'll fit their build make it a great product.

"...Super quiet and great quality!" Read more

"...The unit is completely modular, extremely well-built and completely silent...." Read more

"...with plenty of cables that also look really good in my build, very high quality and you’ll probably only top them if you opt for custom cables...." Read more

"I like the high-quality cables and has good power with no problems." Read more

21 customers mention18 positive3 negative

Customers like the appearance of the system power device. They say the cables look nice and the power supply works well. Some say that the color is nice and it fits nicely in their case. Overall, most are satisfied with the appearance and functionality of the product.

"...It's absolutely gorgeous and fit well with my build...." Read more

"...Came with plenty of cables that also look really good in my build, very high quality and you’ll probably only top them if you opt for custom cables...." Read more

"fits nice and cozy in my airflow 4000. only issue i had was my hard drive being in the way, but luckily i have an ssd...." Read more

"Looks and works fine but I am slowly going insane. There is a frequent buzzing coming from the power supply...." Read more

21 customers mention16 positive5 negative

Customers like the cables provided with the system power device. They say the cables look good, are of high quality, and match the power supply. The fact that it is modular does away with unnecessary cables. Customers also appreciate the white connectors provided and say it makes cable management a breeze.

"...There were more than enough cables for my ITX build and had I used an ATX case, I would have had plenty to connect all of the components...." Read more

"...Came with plenty of cables that also look really good in my build, very high quality and you’ll probably only top them if you opt for custom cables...." Read more

"...design means you only install the cables you need which greatly simplifies cable management...." Read more

"Excellent PSU that has white connectors provided. Cant go wrong with Corsair PSU." Read more

21 customers mention19 positive2 negative

Customers are happy with the noise level of the power supply. They say it's super quiet, has virtually silent operation, and works well.

"...It was my first time building a PC and it was pretty easy to do. Super quiet and great quality!" Read more

"...The unit is completely modular, extremely well-built and completely silent...." Read more

"Power Supply has worked well since installing. It is very quiet as well. Just what I was looking for" Read more

"The power supply is quiet, no noise at all. We use with a Corsair 4000 case. There are plenty of extra modular cables...." Read more

10 customers mention10 positive0 negative

Customers find the installation process of the system power device to be easy. They mention that it is quiet and easy to install.

"Was super easy to set up in my PC build. It was my first time building a PC and it was pretty easy to do. Super quiet and great quality!" Read more

"...Easy to use, works great 4 months in no issues. the cables looked so nice I used them instead of cable extenders in my build...." Read more

"...It has virtually silent operation, easy installation, and gorgeous white cables to fit your build aesthetic. The only downside is the price...." Read more

"...Psu works great and fully module helps to easily install, but make sure your system has the cables you need." Read more

5 customers mention5 positive0 negative

Customers appreciate the modularity of the power supply. They mention that it is completely modular, extremely well built, and completely silent. They also love the modular utility of it, and mention that the modular plug design means they only install the cables they need.

"...The unit is completely modular, extremely well-built and completely silent...." Read more

"...Its modular plug design means you only install the cables you need which greatly simplifies cable management...." Read more

"I love the modular utility of it. I didn't want a bunch of extra cables that I wasn't going to use gettin the way...." Read more

"...And of course the fact that it is modular, it does away with unnecessary cables that a lesser PSU would have." Read more

32 customers mention22 positive10 negative

Customers are mixed about the performance of the power supply. Some mention that it works great, while others say that it wouldn't turn on.

"This power supply does its job, does it well, and looks really good...." Read more

"Its a great PSU, I just wish I would have gone for the 750 version" Read more

"...Sadly, I was unable to use the unit for my build since I needed at lease 3 PCIe cables...." Read more

"...The CPU and RAM were doing fine, it was only the GPU.Eventually, I just said I'll deal with it for a bit...." Read more

20 customers mention13 positive7 negative

Customers are mixed about the power supply. Some mention it's great, reliable, and has enough power for their i7. However, others say that it arrived dead, died only after 8 months, and started to fail. Some say that the fan started to fails, and it had issues with delivering power to the GPU reliably.

"I like the high-quality cables and has good power with no problems." Read more

"...TLDR; my PSU was underpowering my GPU and had to replace due to numerous crashes and affecting productivity...." Read more

"...in about 30 PCs I have built in the past year runs quiet and plenty of power unless you go up to 3090 I have a 3080ti EVGA and it doesn't flinch" Read more

"This psu matches my case and has enough power for my i7 ! I also can't even hear it!" Read more

Works perfectly in my new PC build
5 Stars
Works perfectly in my new PC build
Was super easy to set up in my PC build. It was my first time building a PC and it was pretty easy to do. Super quiet and great quality!
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Top reviews from the United States

Reviewed in the United States on March 10, 2024
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
Customer image
5.0 out of 5 stars Works perfectly in my new PC build
Reviewed in the United States on March 10, 2024
Was super easy to set up in my PC build. It was my first time building a PC and it was pretty easy to do. Super quiet and great quality!
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Customer image
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Reviewed in the United States on February 2, 2024
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
Reviewed in the United States on August 3, 2023
Color: WhiteSize: 750 WattStyle: RMVerified Purchase
9 people found this helpful
Report
Reviewed in the United States on May 15, 2023
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
2 people found this helpful
Report
Reviewed in the United States on February 21, 2024
Color: BlackSize: 650 WattStyle: RMVerified Purchase
Reviewed in the United States on March 15, 2024
Color: WhiteSize: 750 WattStyle: RMVerified Purchase
Reviewed in the United States on January 19, 2024
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
Reviewed in the United States on January 24, 2024
Color: WhiteSize: 750 WattStyle: RMVerified Purchase

Top reviews from other countries

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Fobos
5.0 out of 5 stars Muy buena, alta gama
Reviewed in Mexico on November 24, 2023
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
K
5.0 out of 5 stars Great PSU, great cables
Reviewed in Singapore on July 1, 2023
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
Fani
5.0 out of 5 stars muy buen productr
Reviewed in Mexico on August 4, 2023
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
One person found this helpful
Report
Aldo Alfaro
5.0 out of 5 stars Bastante fácil de instalar
Reviewed in Mexico on January 14, 2024
Color: WhiteSize: 750 WattStyle: RMVerified Purchase
Fernando
5.0 out of 5 stars Funciona muy bien
Reviewed in Mexico on January 7, 2024
Color: WhiteSize: 850 WattStyle: RMVerified Purchase
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Fernando
5.0 out of 5 stars Funciona muy bien
Reviewed in Mexico on January 7, 2024
La fuente de poder funciona muy bien, solo que cuando me llego estaba la caja muy golpeada y un cable pcie no funcionaba
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