% £-47.95
Be Quiet! 550W System Power 11 PSU, 80+ Bronze, Fully Wired, Temp-Controlled Fan, ATX 3.1, PCIe 5.1
Be Quiet! 550W System Power 11 PSU, 80+ Bronze, Fully Wired, Temp-Controlled Fan, ATX 3.1, PCIe 5.1
Be Quiet! 550W System Power 11 PSU, 80+ Bronze, Fully Wired, Temp-Controlled Fan, ATX 3.1, PCIe 5.1
Be Quiet! 550W System Power 11 PSU, 80+ Bronze, Fully Wired, Temp-Controlled Fan, ATX 3.1, PCIe 5.1
BEQUIET

Be Quiet! 550W System Power 11 PSU, 80+ Bronze, Fully Wired, Temp-Controlled Fan, ATX 3.1, PCIe 5.1

Product SKU: PSU-550BQSP11
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Proven Reliability, Quiet Operation

System Power 11 550W has been built with value-oriented users in mind that do not want to pass on reliability and quietness. Elaborated features such as ATX 3.1 compatibility and a temperature-controlled fan underline the value System Power 11 550W offers even at entry-level.
 
  • 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%)
 

 
 
 
Future-Proof Your System

Fulfills all ATX 3.1 specifications
System Power 11 550W is an ATX 3.1 PSU and comes with both native integration of the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, and PCIe 6+2-pin connectors for support of current-gen GPUs. It handles power excursions up to double its rated power with ease. This makes the PSU versatile and the perfect choice for systems of today and the ones to come.
 




 
Very Quiet Operation

High-quality fan for low noise
System Power 11 550W is equipped with a temperature-controlled 120mm quality fan. It provides the low noise operation that be quiet! is famous for, offering remarkable quietness at this price-level.
 




 
High Performance For Your System

Proven reliability for CPU and GPU
System Power 11 550W provides stable and dependable power for CPU and GPU. This ensures a steady and reliable operation even when your PC meets an unexpectedly heavy load.
 




 
80 PLUS® Bronze Certification

Efficient operation
The 80 PLUS® Bronze certification of System Power 11 550W Bronze with an efficiency rating of up to 89.7% is convincing evidence of this PSU’s power saving operation.
 




 
Strong 12V Rail

For a stable PCIe graphics support
System Power 11 550W provides enough power for demanding graphics cards. Safety protections defend against overcurrents, over- and undervoltages, overtemperature, short circuits and overloads, thus keeping your valuable components safe.
 

 

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

Delivery & Shipping Policy

Last updated: 19/09/2025

At Tech Direct UK, we aim to get your order to you as quickly and efficiently as possible. Please see below for our delivery terms.

1. Delivery Options & Costs

  • Free Delivery – Orders over £50 qualify for free UK standard delivery.

  • Standard Delivery – Orders under £50 are charged at £4.99.

2. Delivery Times

  • Next Day Delivery – The majority of items are shipped via next day courier if ordered before 2:00pm (Monday–Friday).

  • Orders placed after 2:00pm, on weekends, or bank holidays will be processed the next working day.

  • Larger or Heavy Items – Certain products (e.g., heavy furniture, oversized goods) may take 2–5 working days for delivery. Estimated times will be displayed at checkout.

3. Delivery Areas

  • We deliver to all mainland UK addresses.

  • Deliveries to remote areas (e.g., Highlands, Islands, Northern Ireland) may take longer or incur additional charges — these will be shown at checkout before confirming your order.

4. Tracking Your Order

  • Once dispatched, you will receive an email confirmation with tracking details (where available).

  • You can track your delivery via the courier’s website.

5. Missed Deliveries

  • If you are not available at the time of delivery, the courier will leave a card or attempt redelivery.

  • Repeated failed delivery attempts may result in the parcel being returned to us. In this case, re-delivery charges may apply.

6. Risk of Loss

  • Risk of loss or damage to the goods passes to you once they are delivered.

  • Please inspect your order upon receipt and notify us of any issues within 48 hours.

7. Contact Us

If you have any questions about delivery, please contact us:
📧 Email: support@techdirectuk.com

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