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be quiet! · 550 W · ATX

be quiet! System Power 11 550W

ATX 3.1 · 80 PLUS Bronze · Fixed cables

Capability: 57
Cap / price: 34
Wattage value: 27
Amazon: $165

View be quiet! System Power 11 550W Gallery in high resolution

Available on Amazon Updated Aug 30, 2026

Capability56.6

Capability / price34.3

Wattage value26.7

$165 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

be quiet! System Power 11 550W at a glance

The be quiet! System Power 11 550W is a 550 W ATX power supply built to the ATX 3.1 generation. Efficiency is listed as 80 PLUS Bronze. Cables are fixed.

The calculated capability score is 56.6, averaging the available wattage, recorded efficiency percentage, and warranty inputs against fixed references. Listed warranty is 5 years. +12V output is 45 A.

Best fit: Mainstream gaming and productivity builds where efficiency and cable management matter.

Platform and cooling

Dimensions are listed as 150 x 140 x 86 mm. Cooling fan size is 120 mm. The unit uses 1 +12V rail at up to 45.83 A per rail. Certifications include 80 PLUS Bronze.

Current value

At $165, price per kilowatt is $300.02. Capability / price is 34.3 and wattage value is 26.7. 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: be quiet!
PSU: be quiet! System Power 11 550W
Launch price: —
Amazon price: $165
Amazon availability: Available
Price updated: Aug 30, 2026

Power & efficiency

Wattage: 550 W
Efficiency: 80 PLUS Bronze
Recorded efficiency: 89%
Warranty: 5 years

Value

Amazon price: $165
Price / kW: $300.02
Capability: 56.6
Capability / price: 34.3
Wattage value: 26.7

Platform & size

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

Electrical

Input voltage: 200-240
+12V output: 45 A
+5V output: 20 A
+3.3V output: 20 A
+12V rails: 1
Max amps / rail: 45.83 A

Cooling & build

Fan size: 120 mm
Fan stop: No
Certifications: 80 PLUS Bronze

Additional information

Also listed as: System Power 11 550W

Amazon

Price history

Nearby capability

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be quiet! be quiet! System Power 11 550W This PSU

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Thermaltake Thermaltake Smart BM3 650W 80Plus Bronze ATX 3.0 & PCIE 5.0 650 W · ATX · Modular

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Thermaltake Thermaltake Smart BX1 650W Bronze 650 W · ATX · Modular

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Thermaltake Thermaltake Smart BX3 650W 80Plus Bronze ATX 3.1 650 W · ATX · Fixed

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ASUS ASUS TUF GAMING 550W Bronze 550 W · ATX · Fixed

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Amazon listing details

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

W129160788

be quiet! System Power 11 550W at a glance

Platform and cooling

Current value

General

Power & efficiency

Value

Platform & size

Electrical

Cooling & build

Additional information

Price history

Similar PSUs

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