be quiet! System Power 11 550W 80+ Bronze Fully Wired ATX 3.1 PSU, Power Supply

Ever built a PC only to hear the PSU whine like a fan in a quiet room? You need a Power Supply that stays out of the way and keeps your components safe. The be quiet! System Power 11 550W 80+ Bronze Fully Wired ATX 3.1 PSU, Power Supply delivers stable, quiet power while protecting against over-current, voltage spikes and overheating, so you can focus on performance, not noise.

Usages of a 550W Power Supply

A 550W Power Supply fits perfectly in mid-range gaming rigs, home office PCs and budget-friendly workstations. It powers modern CPUs and a single high-end GPU without strain, letting you game, edit video or run multiple applications smoothly day after day.

Benefits of be quiet! Power Supply

• Quiet operation: The temperature-controlled 12 cm rifle bearing fan only spins when needed, so you enjoy a silent workspace.
• Comprehensive protection: Over-current, over-voltage, surge and short-circuit safeguards keep your components safe from electrical faults.
• Strong single rail: A single +12 V rail delivering 45.83 A provides reliable power for demanding graphics cards.
• Energy efficiency: 80 PLUS Bronze certification and 89.7 % efficiency lower your electricity bill.
• Lightweight design: Weighing just 1.92 kg, it is easy to install and reduces overall system weight.

be quiet! Power Supply

Choosing a be quiet! Power Supply means you get a unit built to ATX 3.1 standards, ready for the latest motherboards and CPUs. Its non-modular, fully wired cable set simplifies installation and reduces clutter, while the 24.2 dB maximum noise level ensures a calm environment. You also benefit from a solid 100 000 h MTBF, meaning the unit is designed to last for years of continuous use.

The PSU’s compact dimensions (140 mm × 86 mm × 150 mm) fit easily into most cases, and the included cable ties and screws make cable management a breeze. With a 20+4 pin ATX connector, 1 × 4-pin CPU connector, 2 × 6+2 pin PCIe connectors and 5 × SATA ports, you have all the connections you need without extra accessories.

Key Features of a 550W Power Supply

• Power output: 550 W continuous. Provides enough headroom for modern builds.
• Efficiency rating: 89.7 %. Keeps power waste low and saves on electricity costs.
• Fan type: 12 cm rifle bearing fan. Delivers quiet cooling with long-life bearings.
• Noise level: 24.2 dB max. Ensures the system remains whisper-quiet.
• Rail configuration: Single +12 V rail, 45.83 A. Supplies stable power to high-draw components.
• Certification: 80 PLUS Bronze. Confirms reliable performance and efficiency.
• Dimensions: 140 mm × 86 mm × 150 mm. Fits standard ATX cases without space issues.
• Weight: 1.92 kg. Easy to handle during installation.
• Protection features: Over-current, over-voltage, surge, overheating, short-circuit, inrush, under-voltage. Guards your hardware from electrical problems.
• Connectors: 1 × 4-pin CPU, 1 × 4-pin P4, 1 × 12-pin PCIe, 2 × 6+2-pin PCIe, 1 × Molex, 5 × SATA, 20+4 pin ATX. Covers all typical power needs.

Specifications