Be Quiet! System Power 11 550W - Reliable Power for Modern PC Builds

The Be Quiet! System Power 11 550W delivers proven reliability and quiet operation for value-oriented PC builders. This ATX 3.1 compliant power supply combines modern connectivity standards with efficient performance, making it suitable for current and next-generation systems.

ATX 3.1 and PCIe 5.1 Compatibility

This PSU meets full ATX 3.1 specifications with native 12V-2x6 connector support for PCIe 5.1 graphics cards. The unit handles power excursions up to double its rated capacity, ensuring stable operation during GPU load spikes. Two PCIe 6+2-pin connectors provide backward compatibility with current-generation graphics cards.

Temperature-Controlled 120mm Fan

A rifle bearing 120mm fan adjusts speed based on thermal requirements, maintaining low noise levels across different load conditions. Noise output ranges from 10.4 dB(A) at 10% load to 24.2 dB(A) at full load, providing quiet operation during typical usage scenarios.

80 PLUS Bronze Efficiency

The power supply achieves 80 PLUS Bronze certification with efficiency up to 89.7% at 50% load. DC-to-DC voltage regulation technology ensures tight voltage control and stable power delivery to system components. Standby power consumption remains below 0.15 watts.

Strong Single 12V Rail Design

A robust single 12V rail provides consistent power for demanding CPUs and GPUs. Comprehensive protection circuitry includes over-temperature, over-current, over-power, short circuit, over-voltage, under-voltage, and surge protection, safeguarding connected components.

Complete Connectivity

The fully wired design includes: 1x ATX 20+4-pin motherboard connector, 1x P4+4 CPU connector, 1x P4 CPU connector, 1x 12V-2x6 cable for PCIe 5.1 GPUs, 2x PCIe 6+2-pin connectors, 5x SATA connectors, and 1x PATA connector. This configuration supports a wide range of system configurations.

Build Quality and Warranty

With a rated MTBF of 100,000 hours and a 5-year warranty, the System Power 11 550W is built for long-term reliability. The compact dimensions of 150 x 86 x 140 mm and weight of 1.92 kg fit standard ATX cases. The package includes mounting screws, cable ties, and user manual.

Proven Reliability, Quiet Operation

• ATX 3.1 PSU with support for PCIe 5.1 GPUs and GPUs with 6+2 pin connectors
• Temperature-controlled 120mm quality fan reduces system noise
• Rock-solid stability with a strong 12V-rail
• Tight voltage regulation using DC-to-DC technology
• One PCIe 5.1 12V-2x6 300W and 2 PCIe 6-2 connectors
• Stand-by drain of less than 0.15 watts
• 80 PLUS® Bronze efficiency (up to 89.7%)

Description

Specification

• Form Factor: ATX
• Series: Be Quiet! System Power 11
• Wattage: 550 W
• Modular: Fully Wired
• Compatibility: ATX 3.1
  PCIe 5.1
  EPS 12V v2.92
  
• #Hide#Wattage Range: 450 - 560W
• Connectors: 1 x ATX-Motherboard (20+4-pin)
  1 x P4+4 (CPU)
  1 x P4 (CPU)
  1 x 12V-2x6 cables
  2 x PCI-e 6+2-pin (GPU)
  5 x SATA
  1 x PATA
• Rail Design: Single Strong 12V-rail
• AC Input: 200-240 Vac
• Fan Type: Temperature-controlled 120mm Quality Fan
• Fan Bearing: Rifle Bearing
• Noise: 10% load: 10.4 dB(A)
  20% load: 10.8 dB(A)
  50% load: 11.0 dB(A)
  100% load: 24.2 dB(A)
• Max Certification: Bronze
• Efficiency: "80+ Bronze
  230V, 2% load: 64.4%
  230V, 10% load: 84.4%
  230V, 20% load: 88.6%
  230V, 50% load: 89.7%
  230V, 100% load: 86.6%"
• MTBF: "100,000 hours"
• Protection: OTP (over temperature protection)
  OCP (over current protection)
  OPP (over power protection)
  SCP (short circuit protection)
  OVP (over Voltage protection)
  UVP (under Voltage protection)
  SIP (Surge & Inrush protection)
• Additional Features: See Overview
• Package Contents: Power Supply
  Screws
  Cable Ties
  User Manual
• Weight/Dimensions: 1.92 kg
  (LxWxH) 86 x 150 x 140 mm
• Package Weight: 2.3000 kg
• Warranty: 5 Years
• #Hide#ATX 3.1/3.0: ATX 3.1