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Cooler Master · 850 W · ATX

Cooler Master X Silent Edge Platinum 850 Fanless

ATX 3.1 · 80 PLUS Platinum · Modular

Capability: 91
Cap / price: 15
Wattage value: 11
Amazon: $631

View Cooler Master X Silent Edge Platinum 850 Fanless Gallery in high resolution

Not currently available Updated May 17, 2026

Capability91.5

Capability / price14.5

Wattage value10.8

$631 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

Cooler Master X Silent Edge Platinum 850 Fanless at a glance

The Cooler Master X Silent Edge Platinum 850 Fanless is a 850 W ATX power supply built to the ATX 3.1 generation. Efficiency is listed as 80 PLUS Platinum. Cables are modular. This unit is fanless.

The calculated capability score is 91.5, averaging the available wattage, recorded efficiency percentage, and warranty inputs against fixed references. Listed warranty is 15 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 180 x 150 x 86 mm. The unit uses 1 +12V rail at up to 71.00 A per rail. Certifications include 80 PLUS® Platinum.

Current value

At $631, price per kilowatt is $741.92. Capability / price is 14.5 and wattage value is 10.8. 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: Cooler Master
PSU: Cooler Master X Silent Edge Platinum 850 Fanless
Launch price: —
Amazon price: $631
Amazon availability: Not currently available
Price updated: May 17, 2026

Power & efficiency

Wattage: 850 W
Efficiency: 80 PLUS Platinum
Recorded efficiency: 92%
Warranty: 15 years

Value

Amazon price: $631
Price / kW: $741.92
Capability: 91.5
Capability / price: 14.5
Wattage value: 10.8

Platform & size

ATX generation: 3.1
Form factor: ATX
Dimensions: 180 x 150 x 86 mm
Modular: Yes
Fanless: Yes

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: —
Fan stop: Yes
Certifications: 80 PLUS® Platinum

Additional information

Also listed as: X Silent Edge Platinum 850 Fanless
Color: Black

Amazon

Price history

Nearby capability

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Cooler Master Cooler Master X Silent Edge Platinum 850 Fanless This PSU

91.5

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Thermaltake Thermaltake Toughpower GF3 1650W 1650 W · ATX · Modular

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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.

No Fan, No Dust: A fanless design with an innovative heat pipe and modular thermal structure, ensuring ultra-quiet operation and low temperatures for key components.

Innovative Heat Pipe Technology: Our innovative heat pipe with superconductive composite technology uniformly regulates temperature.

Patented Copper-Aluminum Heat Dissipation: Our Patented Aluminum Thermal Mold efficiently dissipates heat, ensuring superior thermal control, and longevity in demanding environments.

Active Bridge Rectifier Boosts Efficiency 2%: Equipped with Infineon CoolMOS, , conserving electricity and reducing power loss compared to traditional bridge diodes, ideal for high-efficiency and eco-friendly users. Featuring Infineon CoolMOS, it conserves electricity and reduces power loss compared to traditional bridge diodes, making it ideal for high-efficiency and eco-friendly applications.

PMBus Port Support: Server-level standard port monitors efficiency, fan speed, temperatures, current load, and overall performance.

Cooler Master X Silent Edge Platinum 850 Fanless 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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