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MONTECH · 850 W · ATX

MONTECH Century II 850W

ATX 3.1 · 80 PLUS Gold · Modular

Capability: 78
Cap / price: 86
Wattage value: 76
Amazon: $90

Available on Amazon Updated Aug 30, 2026

Capability77.6

Capability / price86.3

Wattage value75.6

$90 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

MONTECH Century II 850W at a glance

The MONTECH Century II 850W 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 77.6, averaging the available wattage, recorded efficiency percentage, and warranty inputs against fixed references. Listed warranty is 10 years. +12V output is 70 A.

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

Platform and cooling

Dimensions are listed as 140 x 150 x 86. Cooling fan size is 135 mm. The unit uses 1 +12V rail at up to 70.80 A per rail. Certifications include 80 PLUS Gold.

Current value

At $90, price per kilowatt is $105.76. Capability / price is 86.3 and wattage value is 75.6. 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: MONTECH
PSU: MONTECH Century II 850W
Launch price: —
Amazon price: $90
Amazon availability: Available
Price updated: Aug 30, 2026

Power & efficiency

Wattage: 850 W
Efficiency: 80 PLUS Gold
Recorded efficiency: 92%
Warranty: 10 years

Value

Amazon price: $90
Price / kW: $105.76
Capability: 77.6
Capability / price: 86.3
Wattage value: 75.6

Platform & size

ATX generation: 3.1
Form factor: ATX
Dimensions: 140 x 150 x 86
Modular: Yes
Fanless: No

Electrical

Input voltage: 100-240
+12V output: 70 A
+5V output: 20 A
+3.3V output: 20 A
+12V rails: 1
Max amps / rail: 70.80 A

Cooling & build

Fan size: 135 mm
Fan stop: Yes
Certifications: 80 PLUS Gold

Additional information

Note: ATX 3.1 PSU: Compatible with PCIe 5.1 GPUs

Amazon

Price history

Nearby capability

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MONTECH MONTECH Century II 850W This PSU

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MONTECH Century II 850W at a glance

Platform and cooling

Current value

General

Power & efficiency

Value

Platform & size

Electrical

Cooling & build

Additional information

Price history

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