Be quiet! SYSTEM POWER 11 450W
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Be quiet! SYSTEM POWER 11 450W
The Be quiet! SYSTEM POWER 11 450W power supply unit powers the components in PC builds that require reliability and quiet operation. With a total output of 450W, it provides a solid foundation for office and less demanding gaming computers. It meets the modern ATX 3.1 standard and uses DC-to-DC technology for a stable voltage supply to key system components. A 120mm temperature-controlled fan provides effective cooling, keeping noise levels low even under load. The core is a strong 12V rail, which reliably powers the processor and graphics card, while a complete set of seven safety features actively prevents hardware damage. The 80 PLUS Bronze certification confirms an energy conversion efficiency of up to 89%, which reduces both running costs and waste heat generation.
450W
Power
ATX
Form factor
80 PLUS Bronze
Certification
No
Modularity
Key technologies of the Be quiet! SYSTEM POWER 11 450W power supply unit
- Total power output of 450W
- Standard ATX form factor
- 80 PLUS Bronze certified efficiency
- Cables are fixed to the PSU
- DC-to-DC technology for stable voltage delivery
- Fan blade design for quiet operation
- Powerful 12V rail
Choosing a power supply
When choosing a suitable PC power supply, power is a key parameter in addition to the form factor. This indicates the maximum number of Watts the PSU can continuously supply to the components in the computer. It is a good idea to use a web calculator to determine the optimal power based on your chosen components.
Quiet operation and compatibility
The PSU uses a 120mm fan with a blade design that ensures quiet and efficient airflow. Integrated temperature control automatically adjusts the fan speed to the current load, which keeps noise to a minimum during normal work and only increases cooling performance when needed. At 50% load, the noise level is just 10.8dB(A). Thanks to its 80 PLUS Bronze certification, the PSU converts electrical energy from the mains into usable power with an efficiency of up to 89%. This power supply unit meets the ATX 3.1 standard specifications, which is designed to handle high, short-term component power spikes.
12V rail and PSU stability
The PSU provides a stable and strong 12V rail capable of delivering up to 37.5A. This approach supplies enough power for the processor and graphics card, even during demanding computational tasks or gaming. A single strong rail eliminates the need to distribute the load across multiple weaker rails and provides direct power where it's needed most. DC-to-DC technology derives voltages directly from the main 12V rail, significantly improving stability under load when different components draw different amounts of power. The result is precise and consistent power delivery for all connected components, including sensitive hard drives and the motherboard.
Graphics card power
The unit includes two PCIe 6+2 pin connectors for powering graphics cards. This connector setup supports the connection of most mid-range graphics cards that require one or two external power sources. The flexible 6+2 pin design of the connectors expands compatibility with various graphics card models and provides them with the stable power supply needed for their full performance. The PSU's design focuses on a long service life, evidenced by a mean time between failures of over 100000 operating hours at a temperature of 25°C.
Comprehensive component protection
The PSU integrates a complete set of seven safety features. These protection circuits actively monitor electrical values and protect connected components from damage due to overvoltage, undervoltage, overcurrent, overload, short circuits, or overheating. The protection system acts as a reliable barrier against instability in the electrical grid and prevents hardware failure. The PSU uses fixed, black-sleeved cabling, which simplifies installation and contributes to a tidy case interior. The main ATX cable is sleeved for a better appearance, while the other cables are flat, making them easier to route behind the motherboard. This solution promotes better airflow inside the PC case. For connecting storage devices such as hard drives and SSDs, there are five SATA connectors. A single Molex connector covers the power needs for older components, fans, or various expansion cards and accessories.
Package contents
- Power supply unit
- Power cable
- Screws
- Cable ties
- 1× ATX 24-pin
- 1× CPU 8-pin (4+4)
- 1× PCIe 8-pin (6+2)
- 5× SATA 15-pin
- 1× Molex 4-pin
80 Plus certification in the European market
The 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. In the European market (where a 230V voltage is used), there are six levels of 80 Plus certification with set requirements for PC 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
Listan GmbH, Wilhelm-Bergner-Str. 11, 21509 Glinde, Germany [email protected]
Specifications can be changed without notice. Images are for illustrative purposes only.
