Buy new:
To see product details, add this item to your cart.
FREE Returns
Ships from: Amazon.com
Sold by: Amazon.com
To see product details, add this item to your cart. You can always remove it later.
FREE Returns
To see product details, add this item to your cart. You can always remove it later.
Added to

Sorry, there was a problem.

There was an error retrieving your Wish Lists. Please try again.

Sorry, there was a problem.

List unavailable.

Corsair RM850x (2021) Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - Black

4.7 4.7 out of 5 stars 9,313 ratings

To see product details, add this item to your cart. You can always remove it later.
FREE Returns
Available at a lower price from other sellers that may not offer free Prime shipping.
RMx
Black
850W

Purchase options and add-ons


About this item

  • Fully Modular: Only connect the cables your system needs, making clean and tidy builds easier.
  • 135mm Magnetic Levitation Fan: Utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior reliability.
  • EPS12V Connector: For wide compatibility with modern graphics cards and motherboards.
  • 100% All Japanese 105°C Capacitors: Premium internal components ensure unwavering power delivery and long-term reliability.
  • Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
  • 80 PLUS Gold Certified: High efficiency operation for lower power consumption, less noise, and cooler temperatures.

Frequently bought together

$134.99
Get it as soon as Monday, Mar 25
In Stock
Ships from and sold by Amazon.com.
+
$369.00
In Stock
Ships from and sold by Amazon.com.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
Choose items to buy together.

WARNING:

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

From the brand

Compare with similar items

This Item
Corsair RM850x (2021) Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - Black
Corsair RM850x (2021) Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - Black
Recommendations
Corsair RM1000x (2021) Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - Black
dummy
CORSAIR CX750M 80 PLUS Bronze Semi-Modular Low-Noise ATX 750 Watt Power Supply - NA - Black
dummy
Corsair RM750, RM Series, 80 Plus Gold Certified, 750 W Fully Modular ATX Power Supply - Black
dummy
CORSAIR RM750x Shift Fully Modular ATX Power Supply - Modular Side Interface - ATX 3.0 & PCIe 5.0 Compliant - Zero RPM Fan Mode - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Black
dummy
Corsair RM1000x Shift Fully Modular ATX Power Supply - Modular Side Interface - ATX 3.0 & PCIe 5.0 Compliant - Zero RPM Fan Mode - 105°C-Rated Capacitors - 80 Plus Gold Efficiency - Black
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Price-10% $134.99
List:$149.99
-14% $162.99
List:$189.99
-17% $74.99
List:$89.99
$249.66-31% $89.99
List:$129.99
-11% $187.71
List:$209.99
Delivery
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Get it Mar 26 - 28
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Customer Ratings
Energy efficiency
4.5
4.5
4.0
4.6
4.5
4.5
Noise level
4.5
4.5
4.4
4.6
4.5
4.5
Easy to install
4.4
4.4
4.7
4.5
4.4
4.4
Value for money
4.2
4.2
4.3
3.6
4.2
4.2
Quality of material
4.2
4.2
4.2
4.2
Sold By
Amazon.com
Amazon.com
Amazon.com
QualityPcParts․com [Expedited] ⓐVerified Seller ✅
Amazon.com
Amazon.com
power supply design
Full Modular
Full Modular
Semi-Modular
Full Modular
Full Modular
Full Modular
connector type
ATX
ATX
PCI Express
ATX
ATX, EPS
ATX, EPS
form factor
ATX
ATX
ATX
ATX
ATX
cooling method
Air
Air
Air
Air
Air
fan count
1
1
1
1
1
1
wattage
850 watts
1000 watts
750 watts
750 watts
750 watts
1000 watts

From the manufacturer

MAGNETIC LEVITATION COOLING MEETS HIGH EFFICIENCY

CORSAIR RMx Series fully modular power supplies are built with the highest quality components to deliver 80 PLUS Gold efficient power to your PC with the cooling power of potent Magnetic Levitation fans.

135MM MAGNETIC LEVITATION FAN

Utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low bearing noise, and superior reliability.

HIGH EFFICIENCY

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

FULLY MODULAR WITH DUAL 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 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, but once the action picks up, the fan activates, ensuring critical component temps stay in check.

TECHNOLOGY AND RELIABILITY

For consistent, reliable power and superb electrical performance, each RMx Series power supply features a robust resonant LLC topology with DC-DC conversion, and 105°C rated 100% Japanese capacitors.

Looking for specific info?

Product information

Technical Details

Collapse all

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.
Product Warranty: For warranty information about this product, please click here. [PDF ]

Feedback

Corsair RM850x (2021) Fully Modular ATX Power Supply - 80 PLUS Gold - Low-Noise Fan - Zero RPM - Black


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

URL:
Price: ($)
Shipping cost: ($)
Date of the price:
/
/

Store name:
City:
State:
Price: ($)
Date of the price:
/
/


Please sign in to provide feedback.

Product Description

The product is multiple voltage compatible, that voltage arrange is 100-240V.

Product guides and documents

Customer reviews

4.7 out of 5 stars
4.7 out of 5
9,313 global ratings

Customers say

Customers like the ease of installation, value, and performance of the power supply. For example, they mention it's easy to install, provides efficient power delivery, and runs everything just fine. Some appreciate noise, and modularity. That said, opinions are mixed on quality and connectivity.

AI-generated from the text of customer reviews

189 customers mention151 positive38 negative

Customers like the performance of the power supply. They say it works as a top-line power supply should, and runs everything just fine. Some customers also mention that their computer is performing like new again, and that they haven't had any issues with it.

"...The PSU's zero RPM fan mode ensures silent operation during low to medium loads, as the fan only spins up when required, keeping noise levels at a..." Read more

"...well-known reputable company, a PSU with great modularity and great performance, and frankly a good value...." Read more

"...So far I’m very pleased with the power supply and have no complaints on its performance. The power supply is quiet and was easy to install...." Read more

"...The zero RPM fan mode is particularly useful during idle or low-load scenarios, ensuring silent operation and minimizing unnecessary noise...." Read more

173 customers mention141 positive32 negative

Customers like the noise of the system power device. They mention that it runs quietly and has no coil whine.

"...Its 750 Watt power output, 80 Plus Gold certification, and silent operation make it the ideal choice for powering high-performance gaming systems...." Read more

"...The power supply is quiet and was easy to install. The cables seem to be high quality and were not overly stiff...." Read more

"...is particularly useful during idle or low-load scenarios, ensuring silent operation and minimizing unnecessary noise...." Read more

"...The fan is quiet and only on when it needs to be. The black finish matches my case nicely and the warranty is stellar...." Read more

125 customers mention112 positive13 negative

Customers like the power supply. For example, they say it offers efficient power delivery, exceptional cable management options, and silent operation. Some say it provides high-quality clean power and has a reasonable price. That said, most are happy with their purchase and recommend it to others.

"...Its 750 Watt power output, 80 Plus Gold certification, and silent operation make it the ideal choice for powering high-performance gaming systems...." Read more

"...With a whopping 1000 watts of power, it effortlessly handles the demands of my system, including multiple graphics cards, high-end processors, and..." Read more

"Needed a new PSU for a RTX4080 and this came in just lots of power and the hookups on the side made everything very convenient...." Read more

"...The voltage readings are now very stable.The 12VHPWR cable on this PSU easily clears the case...." Read more

116 customers mention96 positive20 negative

Customers find the installation process of the system power device to be easy. They mention that it makes no noise, has zero hassle, and works great out of the box. Customers also appreciate the modular design, which makes installation a breeze. They say the cable routing is clean, simple, and convenient. They also mention that the cables make it easy to add new devices.

"...providing stable and consistent power delivery while offering a convenient and tidy cable management solution...." Read more

"...The power supply is quiet and was easy to install. The cables seem to be high quality and were not overly stiff...." Read more

"...The fully modular cables provide excellent flexibility and ease of cable management...." Read more

"...I appreciate the low noise level, ease of install (most are), and the cabling is good for what it is...." Read more

63 customers mention46 positive17 negative

Customers like the value of the system power device. They say it's worth the investment, and a solid investment. Some say that it saves them power cost.

"...a PSU with great modularity and great performance, and frankly a good value...." Read more

"...The price point on this power supply is a fantastic value." Read more

"They do work perfectly fine as a PSU, but they are not as good as other options. The cables are the main issue I have with it...." Read more

"...Check there first. I went with the Corsair 5000D. It is a great case at a reasonable price." Read more

56 customers mention56 positive0 negative

Customers appreciate the modularity of the power supply. They mention that it has a fully modular design, with lots of cables. Customers also appreciate the exceptional cable management options and silent operation. Overall, customers are satisfied with the product's modularity.

"...power supply unit that offers stable power delivery and a modular design for easy cable management...." Read more

"...quality product from well-known reputable company, a PSU with great modularity and great performance, and frankly a good value...." Read more

"...Another notable feature of the RM1000x is its modular design. The fully modular cables provide excellent flexibility and ease of cable management...." Read more

"...Comes with all the things you need. Modular cabling design, cable ties, high-quality box to protect in shipping...." Read more

263 customers mention179 positive84 negative

Customers are mixed about the quality of the power supply. Some mention that it seems like good quality, rock solid, and extremely reliable. However, others say that it was faulty and caused random system crashes.

"...In conclusion, the Corsair RMX Series (2021) RM750x is a reliable and efficient power supply unit that offers stable power delivery and a modular..." Read more

"This is a great quality product from well-known reputable company, a PSU with great modularity and great performance, and frankly a good value...." Read more

"...The door would press into the cable and was causing random system crashes. The voltage readings are now very stable...." Read more

"...The power supply is quiet and was easy to install. The cables seem to be high quality and were not overly stiff...." Read more

198 customers mention73 positive125 negative

Customers are mixed about the connectivity of the system power device. Some mention that it allows them to connect only the necessary cables, minimizing clutter and maximizing airflow inside their computer. They appreciate the modular cabling design, cable ties, and high-quality box to protect it. However, others say that the cables are stiff, rigid, and rough.

"...that what makes installation a little difficult is that the cables are somewhat rigid." Read more

"...It allows me to connect only the necessary cables, minimizing clutter and maximizing airflow inside my PC case...." Read more

"...The cables that are provided are stiff and the 12vhp is only 450w and not 600w...." Read more

"...The worst part though is that there was no power cable to even connect the PSU to the surge protector or wall...." Read more

Worth it
5 Stars
Worth it
Needed a new PSU for a RTX4080 and this came in just lots of power and the hookups on the side made everything very convenient. I did overbuild my system in some sense but if you can why not?Make sure your case and fit this with the side hook up you will need a case wide enough. Corsair has a list of cases that will work with this on their site. Check there first. I went with the Corsair 5000D. It is a great case at a reasonable price.
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on July 14, 2023
Style: RMxColor: BlackSize: 850WVerified Purchase
14 people found this helpful
Report
Reviewed in the United States on August 3, 2023
Style: RMxColor: BlackSize: 750WVerified Purchase
14 people found this helpful
Report

Top reviews from other countries

Translate all reviews to English
Muy buenos
5.0 out of 5 stars Excelente
Reviewed in Mexico on March 10, 2024
Style: RMx Shift (ATX 3.0 & PCIe 5.0)Color: BlackSize: 1000WVerified Purchase
anon7691
5.0 out of 5 stars Nice & Quiet
Reviewed in Canada on March 9, 2024
Style: RMxColor: BlackSize: 850WVerified Purchase
Ricardo Zamora
5.0 out of 5 stars Buena calidad/precio
Reviewed in Mexico on January 10, 2024
Style: RMxColor: BlackSize: 850WVerified Purchase
One person found this helpful
Report
Lucas R.
5.0 out of 5 stars Boa fonte e envio
Reviewed in Brazil on April 10, 2023
Style: RMxColor: BlackSize: 1000WVerified Purchase
FirD'aus
5.0 out of 5 stars Solid built!
Reviewed in Singapore on February 6, 2024
Style: RMxColor: BlackSize: 850WVerified Purchase