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Exc. VAT : £ 54.52
Inc. VAT : £ 65.42

Be Quiet! 550W FM Pure Power 11 PSU, Fully Modular, Rifle Bearing Fan, 80+ Gold, Cont. Power

Exc. VAT : £ 54.52
Inc. VAT : £ 65.42
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Exceptional Quiet, Superior Features

Pure Power 11 FM 550W offers peerless dependability and best-in-class features such as modular cable management. Whether you are assembling a very quiet system, upgrading your PC, or building a gaming system with a powerful high-end GPU_ Pure Power 11 FM 550W offers the best combination of features at a very popular price.

  • 80 PLUS® Gold efficiency (up to 93.5%)
  • Modular cables for maximum build flexibility
  • Two strong 12V-rails
  • Silence-optimized 120mm be quiet! fan
  • Advanced stability and voltage regulation thanks to LLC, SR and DC-to-DC
  • Full suite of top safety features
  • Five-year manufacturer’s warranty

80 Plus® Gold Certification

Pure Power 11 FM 550W is certified 80 PLUS Gold with an efficiency rating of up to 93.5% – a truly outstanding level for this class of PSU. The most compelling benefit_ lower power consumption and consequently lower costs, and cooler, quieter operation.

Modular Cables

Thanks to the modular cables, all cables that serve no purpose in the system are left out. For this reason, systems always appear very tidy. At the same time installation is performed much more conveniently. A smoother airflow results from the uncluttered layout of the system, which means lower noise and temperatures prevail inside the case.

Power And Compatibility for your system

Pure Power 11 FM offers 550W of continuous power with two independent 12V rails for signal stability and two PCI express connectors to support powerful graphics cards. Whether you are building a very quiet system or gaming system_ Pure Power 11 FM 550W is always the correct choice!

Exceptionally Silent Operation
The silence-optimized 120mm be quiet! fan is thermally governed to strike the best balance between effective cooling and quietness. Airflow-optimized fan blades reduce turbulence, enabling best-in-class quiet functionality and the almost inaudible operation that be quiet! is famous for.

High-Class Technologies
The use of LLC and Synchronous Rectifier (SR) provides very stable operation and enhanced voltage regulation. The PSU is equipped with DC-to-DC conversion for tight voltage regulation even under heavy cross-loading conditions. This ensures reliable operation with the next generation of processors and graphics cards.


Package Contents
80+ Gold
230V, 20% load_ 89.8% 230V, 50% load_ 93.5% 230V, 100% load_ 92%
100,000 hours
Over current Over voltage Under voltage Short circuit Over temperature Over power
See Overview
PSU Screws Cable ties Manual
dB(A) at 20% load_ 8.8 dB(A) at 50% load_ 9 dB(A) at 100% load_ 18.1
1.45 kg 160 x 150 x 86 mm
Package Weight
1.4500 kg
5 Years

80+ Certification
Form Factor
550 W
Be Quiet! Pure Power 11
Fully Modular
ATX 12V 2.4 & EPS 12V 2.92
#Hide#Wattage Range
450 - 560W
Rifle Bearing
1 x ATX-Motherboard (20+4-pin) 1 x P4+4 (CPU) 2 x PCI-e 6+2-pin (GPU) 2 x PATA 9 x SATA 1 x FDD (Floppy)
Rail Design
Dual +12V
AC Input
AC 100-240 V
Active PFC
Fan Type
120mm Silence-optimized be quiet! fan
Fan Bearing