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Corsair · 850 W · ATX

CORSAIR RM850x Shift

ATX 3.0 · 80 PLUS Gold · Modular

Capability
77
Cap / price
55
Wattage value
48
Amazon
$141
CORSAIR RM850x Shift
View CORSAIR RM850x Shift Gallery in high resolution
$141
Available on Amazon Updated Aug 30, 2026 Prime FBA
Capability77.2
Capability / price54.6
Wattage value48.1
$141 on Amazon PSU table Compare this PSU

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Written analysis

CORSAIR RM850x Shift at a glance

The CORSAIR RM850x Shift is a 850 W ATX power supply built to the ATX 3.0 generation. Efficiency is listed as 80 PLUS Gold. Cables are modular. It supports fan-stop at low load.

The calculated capability score is 77.2, averaging the available wattage, recorded efficiency percentage, and warranty inputs against fixed references. Listed warranty is 10 years. +12V output is 71 A.

Best fit: Performance desktops whose calculated component load fits comfortably within a 750–999 W supply.

Platform and cooling

Dimensions are listed as 160mm x 150mm x 86mm. Cooling fan size is 140 mm. The unit uses 1 +12V rail at up to 71.00 A per rail. Certifications include 80 PLUS Gold.

Current value

At $141, price per kilowatt is $166.40. Capability / price is 54.6 and wattage value is 48.1. Compare nearby supplies below; wattage alone does not determine value.

Unit data

Full specifications

Wattage, efficiency, platform size, electrical outputs, connectors, cooling, and value in one technical sheet.

General

Manufacturer
Corsair
PSU
CORSAIR RM850x Shift
Launch price
—
Amazon price
$141
Amazon availability
Available
Price updated
Aug 30, 2026

Power & efficiency

Wattage
850 W
Efficiency
80 PLUS Gold
Recorded efficiency
91%
Warranty
10 years

Value

Amazon price
$141
Price / kW
$166.40
Capability
77.2
Capability / price
54.6
Wattage value
48.1

Platform & size

ATX generation
3.0
Form factor
ATX
Dimensions
160mm x 150mm x 86mm
Modular
Yes
Fanless
No

Electrical

Input voltage
100-240
+12V output
71 A
+5V output
20 A
+3.3V output
20 A
+12V rails
1
Max amps / rail
71.00 A

Cooling & build

Fan size
140 mm
Fan stop
Yes
Certifications
80 PLUS Gold

Additional information

Also listed as
RM850x Shift
Color
White

Amazon

Price history

Nearby capability

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

Innovative Easy-Access Connection Position: Modular connections on the side of the PSU mean easier access for your cables and simpler, cleaner cable management.

Fully Modular Micro-Fit PSU Connectors: CORSAIR Type 5 Gen 1 micro-fit PSU cables mean you only connect the cables your system needs while taking up less space.

140mm Fluid Dynamic Bearing Fan: Utilises a specially calculated fan curve for high performance, low noise, and superior reliability.

Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting the PCIe Gen 5.1 platform and resisting transient power spikes.

100% 105°C-Rated Japanese Electrolytic Capacitors: Premium internal components deliver unwavering power delivery and long-term reliability.

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