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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

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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 09, 2026

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

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Customer Reviews of the Corsair RM850x

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Manufacturer Contact Info

Item#: 9SIAH2MM125089

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