$269^.99

Free 15-day Returns

This product is available from Newegg.

Limit 99999 per customer.

Sold by Vertex Nano Technology

4.5 (326 seller ratings)

Shipped by Vertex Nano Technology

Price alert

Add to Wish List

Best Sellers

Newegg

$209^.99
+ FREE SHIPPING

iSanek

4.6 (916 total ratings)

$271^.86
+ FREE SHIPPING

Volume Discounts Available

Meet Your Seller

Vertex Nano Technology

See Seller Store

Get Educated

Make informed decisions with expert advice. Learn More

Main image of CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 2 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 3 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 4 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 5 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 6 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 7 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 8 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 9 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 10 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 11 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Alt view image 12 of 12 - CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Customer images

Shop All Corsair Products | Visit Vertex Nano Technology Store

CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

(1,058)(171) Write a Review

Options: ATX 3.1 80+ Gold (850W)

ATX 80+ Gold (750W)
ATX 3.1 80+ Gold (1000W)
ATX 3.1 80+ Gold (850W)
ATX 3.1 80+ Gold (750W)
ATX 3.1 80+ Gold (850W) Shift
ATX 3.1 80+ Gold (1000W) Shift
ATX 3.1 80+ Gold (1200W) Shift

Fully modular
Cybenetics Gold-certified
ATX 3.1 Compliant
Supports PCIe 5.1
Native 12V-2x6 connector
Ultra-flexible embossed cables with low-profile combs
Fan speed adjustment knob
100% Japanese 105°C-rated electrolytic capacitors
50°C Maximum operating temperature
Low-noise 140mm FDB fan
Zero RPM fan mode

Overview

Specs

Reviews (1,058)

RMX SERIES, RM850X, 850 WATT, ATX 3.1, CYBENETICS GOLD CERTIFIED, FULLY MODULAR

Best Seller Ranking	#5 in Power Supplies

General
Brand	CORSAIR
Series	RMx Series
Model	RM850x
Part Number	CP-9020270-NA

Details
Color	Black
Type	ATX 3.1 Compatible
Maximum Power	850 W
Fans	1 x 140 mm
Main Connector	24Pin
Max PSU Length	160 mm
Modular	Full Modular
Energy-Efficient	Cybenetics Gold
Input Voltage	100 - 240 V
Input Frequency Range	47 - 63 Hz
Input Current	+3.3V@20A, +5V@20A, +12V@70.8A, +5Vsb@3A
Connectors	1 x 12VHPWR (12+4) PCIe / 1 x 24 pin ATX / 2 x 8 pin (4+4) EPS (CPU) / 3 x 8 pin (6+2) PCIe / 3 x PATA / 8 x SATA
Cable Spec	1 x ATX CABLE 24-PIN (24), 610mm +/- 10mm 2 x EPS/ATX12V CABLE 8-PIN (4+4), 750mm +/- 10mm 3 x PCIe CABLE 8-PIN (6+2), 650mm +/- 10mm 1 x PCIe CABLE 12+4-PIN(12+4), 650mm +/- 10mm 2 x SATA CABLE (4 SATA - (Straight angle)), 850mm +/- 10mm 1 x PATA CABLE (4-PIN), 750mm +/- 10mm

Package
Package Content	RM850x Power Supply \| DC Cable Kit \| Power Cord \| Mounting Screws \| Cable Ties

Additional Information
First Listed on Newegg	July 31, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
Read full details
CONTACT

Return Policies

Return for refund within: 15 days
Return for replacement within: 30 days
This item is covered by Vertex Nano Technology Return Policy

Manufacturer Contact Info

For a directory of all our manufacturers, please click below.
Manufacturers Directory

Best Sellers

Meet Your Seller

CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Learn more about the Corsair RM850x

Customer Reviews of the Corsair RM850x

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: 9SIA9U1M3C8475

Best Sellers

Meet Your Seller

CORSAIR RMx Series RM850x ATX Power Supply - Fully Modular - ATX 3.1 - PCIe 5.1 - Cybenetics Gold - Low-Noise - Japanese Capacitors - 850 Watts

Learn more about the Corsair RM850x

Customer Reviews of the Corsair RM850x

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info