Be quiet! SYSTEM POWER 11 550W
Be quiet! SYSTEM POWER 11 550W
The Be quiet! SYSTEM POWER 11 550W PC power supply is a reliable foundation for computer builds, combining quiet operation with stable power delivery. With a total output of 550W and a robust 12V rail, it efficiently powers processors and graphics cards. This power supply fully complies with the ATX 3.1 standard, and its DC-to-DC technology ensures precise voltage regulation. The 80 PLUS Bronze certification confirms a high efficiency of up to 89.7%, which contributes to lower energy consumption and less heat generation from components.
550W
Power
ATX
Format
80 PLUS Bronze
Certification
No
Modularity
Key technologies of the Be quiet! SYSTEM POWER 11 550W PC power supply
- Total power output of 550W
- Up to 89.7% efficiency with 80 PLUS Bronze certification
- Quiet operation thanks to a speed-controlled fan
- Meets the ATX 3.1 standard and supports PCIe 5.1
- Includes a 12V-2x6 connector to power graphics cards
- Offers two PCI-E 6+2 pin connectors for older GPUs
- DC-to-DC technology improves voltage stability
- Protection suite includes OVP, UVP, OCP, OPP, SCP, OTP, and SIP
Choosing a power supply
When choosing a suitable PC power supply, besides the format, the key parameter is its power output. This indicates the maximum number of Watts the power supply can continuously deliver to the computer's components. It is a good idea to use a web calculator to determine the optimal power output based on your chosen components.
Quiet operation and compatibility
The power supply uses a 120mm fan with a rifle bearing and a four-pole motor, with its speed automatically controlled by the current temperature. At 50% load, the noise level is just 11dB(A), and this thermal regulation keeps noise levels low even under higher system loads. At full power, the noise level does not exceed 24.2dB(A). It also includes 2 standard PCI-E 6+2 pin connectors. This setup maintains backward compatibility with a wide range of graphics cards that require traditional power. The power supply uses a topology with DC-to-DC technology, where the voltage on the 3.3V and 5V rails is generated directly from the main 12V rail.
80 PLUS Bronze efficiency with PCle 5.1 support
The 80 PLUS Bronze certification confirms the power supply's efficiency of up to 89.7% at 50% load on a 230V network. Higher efficiency leads to lower energy losses, resulting in a lower operating temperature and quieter fan operation. The fixed cabling includes a native 12V-2x6 connector that powers graphics cards. It also serves to directly power PCIe 5.1 standard components, eliminating the need for potentially unreliable adapters.
ATX 3.1 standard and 12V rail
This PC power supply complies with the ATX 3.1 standard, which defines stricter tolerances for voltage spikes and handling high transient loads. The power supply is capable of briefly handling up to double its rated power, which supports stable operation. The power supply uses a single strong 12V rail that delivers up to 45.83A. This design provides consistent and stable power for the most power-hungry components, such as processors and graphics cards.
Comprehensive protection
The protection system includes 7 features for safe operation. It protects connected components from potential damage due to overvoltage, undervoltage, overcurrent, overload, or short circuits. It also includes protection against overheating and inrush currents at start-up. All cables are permanently attached to the PC power supply. The main 24-pin motherboard cable is sleeved for increased durability. Flat cables simplify routing and organisation inside the case, as they bend more easily and take up less space.
Package contents
- PC power supply
- Screws
- Cable ties
- Power cable
- 1× ATX 24-pin
- 1× CPU 8-pin (4+4)
- 1× 12V-2x6 16-pin (12+4)
- 1× PCIe 8-pin (6+2)
- 5× SATA 15-pin
- 1× Molex 4-pin
80 Plus certification on the European market
80 Plus certification was created to objectively evaluate the efficiency of computer power supplies. This gives users a simple and clear way to compare different models. On the European market (which uses a 230V voltage), there are six levels of 80 Plus certification, each with specific requirements for computer power supplies. Higher energy efficiency primarily means lower energy consumption.
| PC power supply load | Efficiency at 20% load | Efficiency at 50% load | Efficiency at 100% load |
|---|---|---|---|
| 80 PLUS | 82% | 85% | 82% |
| 80 PLUS Bronze | 85% | 88% | 85% |
| 80 PLUS Silver | 87% | 90% | 87% |
| 80 PLUS Gold | 90% | 92% | 89% |
| 80 PLUS Platinum | 92% | 94% | 90% |
| 80 PLUS Titanium | 94% | 96% | 94% |
Specifications
Performance and format
Equipment
Efficiency
Connectors
Cooling system
Dimensions
| Code: | BNsp11a04 |
| Warranty: | 60 months |
| Links: | Producer's Website: |
| Manufacturer information |
Listan GmbH, Wilhelm-Bergner-Str. 11, 21509 Glinde, Germany [email protected] 
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