Corsair RM850X 850-Watt ATX Modular Power Supply

Model Number: CP-9020200-NA
Web Code: 15397408

Corsair RM850X 850-Watt ATX Modular Power Supply

Overview

Run your PC efficiently with the Corsair RM850X (2021) PSU 850-Watt modular power supply.This ATX power supply has fully modular design that allows you to easily build and upgrade your PC by letting you only connect the cables you need. Its Zero RPM mode provides almost silent operation at low and medium loads.
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Overview

Run your PC efficiently with the Corsair RM850X (2021) PSU 850-Watt modular power supply.This ATX power supply has fully modular design that allows you to easily build and upgrade your PC by letting you only connect the cables you need. Its Zero RPM mode provides almost silent operation at low and medium loads.
  • Fully modular design make PC builds and upgrades easy, as you need to only connect the cables that your system requires
  • 850-watt power supply works well for gaming heads who want a reliable and consistent power flow
  • ATX form factor permits simultaneous power supply to all the motherboard components while ensuring durable performance
  • 135mm magnetic levitation bearing fan and custom engineered rotors offer increased performance, low noise, and greater reliability
  • Resonant LLC topology with DC-to-DC conversion ensures clean and consistent power while lessening coil whine for hush operation, and also facilitates use of more energy efficient sleep states
  • Reliable 105 degrees Celsius rated, 100% industrial-grade Japanese capacitors produce constant power supply
  • Assists Modern Standby sleep mode for superfast wake-from-sleep times and improved load efficiency
  • Zero RPM fan mode provides virtually silent operation at low to medium loads
  • Two RMx Series EPS12V connectors permit new graphic cards and motherboards
  • 80 PLUS Gold certified efficiency makes it low on power consumption and noise while offering cooler temperatures
Power
850 W
80 PLUS Certification
80 PLUS Gold

Configuration

Power Supply Form Factor
ATX
Modular Cables
Yes
Modular or Non-Modular
Modular
Fan Size
135 mm

Electric

Input Voltage
100-240V
+3.3 V Rail
20 A
+5 V Rail
20 A
+12 V Rail
70.8 A
-12 V Rail
0.3 A
+5 V Standby
3 A

Connectors

Motherboard Connector
24-Pin
4-Pin/8-Pin EPS Connector
3
8-Pin PCI-E Connector
4
4-Pin Molex (Peripheral) Connector
4
SATA Power Connector
14

Physical Features

Special Features
Microsoft Modern Standby Support
OVP (Over Voltage Protection)
Yes
Overload Protection
No
RGB Lighting
No
Width
16 cm
Height
15 cm
Depth
8.6 cm
Weight
1.7 kg

Warranty

Manufacturer's Warranty - Parts
2 Years
  • RMX (2021) Series ATX Power Supply
  • Mounting Screws
  • AC Power Cord
  • DC Modular Cable Set
  • Cable Ties
  • Product Manual

There is no manufacturer content to show for this product. Explore the Details & Specs and Customer Reviews sections to learn more.

Rating Breakdown

5

133

4

13

3

5

2

1

1

9

Reviewer Recommendation

91%

Of the 161 reviewers who responded, 146 would recommend this product.

Key Considerations

Averages based on how reviewers feel this product performs.

Quality:
Value:
Ease of Use:

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  • it’s DANG loud.
    Verified BuyerReviewed by marie - October 6, 2021

    It works like a power supply should, but it’s unbearably loud—louder than all of my power supplies, louder than an ancient dell computer you’d see dime a dozen in elementary schools. the weird thing? It’s not heating up. Nothing seems to be wrong about it, the fans just go from super quiet in bios setup to maximum overdrive as soon as i get into windows. maybe i did something wrong? i used all the cords out of the box and tried as hard as i could to brute force all the power supply plugs as snugly as possible. If I’m doing something wrong, please give me your insight i just cant believe this power supply ended up sounding worse than my starter one from 2015.

    Review originally posted on bestbuy.com

    No, I would not recommend this to a friend.
    Quality:
    Value:
    Ease of Use:

  • Bad choice for 3080/3090/miners– 2PCIe cables.
    Verified BuyerReviewed by Hiyoriwoot - June 15, 2021

    Was going to give it a 3 or so but honestly I can’t even manage that. This series is so unbelievable to me. Many downgrades from the previous rm850 and it is at this point 20 or so dollars more. Returning mine and waiting for the old 850 to ship. Main complaint is noise and a very strange cable layout. Be careful as other reviews have pointed out. They are now shipping with 2!! PCIe daisy chained connectors vs the 4 that they originally shipped with. Although there are 5 8 pin connectors on the PSU you have to bug Corsair support if you want to run a 3x 8pin card with dedicated cables. Strangely they ship with 3 EPS/ATX 12v cables that I can’t come up with any reasonable use case for.

    Review originally posted on bestbuy.com

    No, I would not recommend this to a friend.
    Quality:
    Value:
    Ease of Use:

  • Had to buy this for my 3080ti
    Verified BuyerReviewed by scorcher64 - July 24, 2021

    This was an unexpected purchase. Everyone said a 750W P/S was enough for a 3080ti but that would depend on your overall system config, as well as whether you're OCing or not. When I bought my 3080ti, it tripped the OC protection on my old P/S, and had to upgrade to this one. The biggest downside is that the 2020 model only comes with two PCI-E cables (vs. the 2018 model with three), despite what the packaging and modular ports say. If you buy a GPU that needs three PCI-E connectors and you don't wish to use the pigtails, you'll have to buy more cables from Corsair.

    Review originally posted on bestbuy.com

    Yes, I would recommend this to a friend.
    Quality:
    Value:
    Ease of Use:


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