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be quiet! System Power 11 550W

PSU • be quiet! • $ 155.01

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Overview

Silent, Reliable, and Efficient Power for Your PC

The be quiet! System Power 11 550W is a testament to German engineering, delivering dependable power with whisper-quiet operation. Whether you're building a budget gaming rig, upgrading an office workstation, or creating a home server, this PSU offers the perfect balance of performance, safety, and affordability.

Key Features

80 PLUS Bronze Certification: Enjoy up to 89.7% efficiency at typical loads, reducing energy waste and heat generation.
Silent 120mm Fan: A temperature-controlled fan ensures near-silent operation under normal conditions, and only spins up when needed.
Full Protection Suite: OVP, OCP, UVP, SCP, OPP, OTP, and SIP safeguard your components from electrical anomalies.
Modern Connectors: Includes a 12V-2x6 (PCIe 5.1) connector for next-gen GPUs, plus multiple PCIe and SATA options.
Compact ATX Form Factor: At 140 x 150 x 86 mm, it fits easily into most cases, including smaller ATX builds.

Performance and Reliability

The single +12V rail design delivers stable power to your CPU and GPU, ensuring smooth operation even under heavy loads. With 550W of continuous output, it comfortably handles mid-range components, such as an RTX 4060 or Core i5 processor. The non-modular cable design keeps costs down while still providing all essential cables neatly organized.

Who Is It For?

This PSU is ideal for budget-conscious builders who refuse to compromise on quality. It's perfect for entry-level gaming PCs, office systems, and media centers. If you prioritize silence and reliability without breaking the bank, the System Power 11 is an excellent choice.

Why Choose be quiet!?

be quiet! is renowned for its quiet cooling solutions and power supplies. The System Power 11 continues this legacy, offering a 3-year manufacturer's warranty and a reputation for longevity. Trust in a brand that engineers products with precision and care.

Upgrade your system with the be quiet! System Power 11 550W and experience the difference that quality power delivery makes.

Key Specifications

Connector Type: ATX12V / EPS12V (non-modular)

Output Wattage: 550 Watts continuous (single +12 V rail)

Form Factor: ATX (140 × 150 × 86 mm)

Wattage: 550W

Cooling Method: Air-cooled, 120 mm temperature-controlled fan

Design: Non-Modular

Protections: OVP, OCP, UVP, SCP, OPP, OTP, SIP (surge/inrush)

Efficiency: 80 PLUS Bronze certified (up to ~89.7 % efficiency at typical load)

Cable Set: 1 × 24-pin ATX motherboard 1 × 8-pin (4+4) EPS12V CPU connector 1 × 12V-2×6 (PCIe 5.1) connector 2 × 6+2-pin PCIe connectors 5 × SATA 1 × 4-pin Peripheral (Molex)

Detailed Parameters

Rated Power Output in Watts:: 500
Form Factor:: ATX, EPS

Where to Buy

Amazon

Pros

Whisper-quiet 120mm fan with temperature control
80 PLUS Bronze efficiency (up to 89.7%)
Modern 12V-2x6 connector for next-gen GPUs
Comprehensive protection suite (OVP, OCP, etc.)
Compact ATX size fits most cases

Cons

Non-modular cables can clutter builds
Only 550W u2013 not for high-end multi-GPU setups
No RGB or aesthetic extras

Frequently Asked Questions

Is the be quiet! System Power 11 550W enough for an RTX 4060?

Yes, the 550W output is sufficient for an RTX 4060 (which typically requires a 450W PSU) and a mid-range CPU like an Intel Core i5. Ensure your total system draw stays under 500W for headroom.

Does this PSU support the latest ATX 3.0 motherboards?

It uses the standard ATX12V/EPS12V connectors, which are compatible with all ATX motherboards. It also includes a 12V-2x6 connector for PCIe 5.1 GPUs, but it is not ATX 3.0 certified.

How loud is the fan under load?

The 120mm fan is temperature-controlled and operates very quietly. Under typical loads, it remains nearly inaudible. Even under heavy load, noise levels stay low, thanks to be quiet!'s engineering.