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Corsair · 850 W · ATX

Corsair RM850e

ATX 3.1 · 80 PLUS Gold · Modular

Capability: 69
Cap / price: 58
Wattage value: 57
Amazon: $119

View Corsair RM850e Gallery in high resolution

Available on Amazon Updated Aug 30, 2026

Capability68.5

Capability / price57.6

Wattage value57.1

$119 on Amazon PSU table Compare this PSU

Size this PSU for a complete buildThe Builder unlocks PSU choices after it knows the CPU, GPU, case format, and estimated demand. Calculate build power first

Written analysis

Corsair RM850e at a glance

The Corsair RM850e is a 850 W ATX power supply built to the ATX 3.1 generation. Efficiency is listed as 80 PLUS Gold. Cables are modular. It supports fan-stop at low load.

The calculated capability score is 68.5, averaging the available wattage, recorded efficiency percentage, and warranty inputs against fixed references. Listed warranty is 7 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 140x150x86. 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 $119, price per kilowatt is $140.00. Capability / price is 57.6 and wattage value is 57.1. 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 RM850e
Launch price: —
Amazon price: $119
Amazon availability: Available
Price updated: Aug 30, 2026

Power & efficiency

Wattage: 850 W
Efficiency: 80 PLUS Gold
Recorded efficiency: 90%
Warranty: 7 years

Value

Amazon price: $119
Price / kW: $140.00
Capability: 68.5
Capability / price: 57.6
Wattage value: 57.1

Platform & size

ATX generation: 3.1
Form factor: ATX
Dimensions: 140x150x86
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: RM850e
Color: Black

Amazon

Price history

Nearby capability

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Corsair Corsair RM750e 750 W · ATX · Modular

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Corsair Corsair RM850e This PSU

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Seasonic SEASONIC CORE V2 GX-850 850 W · ATX · Modular

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ASUS ASUS Prime 750W Gold 750 W · ATX · Modular

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ASUS ASUS ROG Strix 550W Gold 550 W · ATX · Modular

71.2

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ASUS ASUS Prime 850W Gold 850 W · ATX · Modular

71.3

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Corsair Corsair RM1000e 1000 W · ATX · Modular

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be quiet! be quiet! Pure Power 13 M 550W 550 W · ATX · Modular

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Compare these in the PSU table

Discussion

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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.

Fully Modular PSU: Reliable and efficient, low-noise power supply with fully modular cabling, so you only have to connect the cables your system build needs.

Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting PCIe 5.1 platform withstands 2x transient power excursions from the GPU.

Keeps Quiet: A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.

105°C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.

Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.