Be quiet! SYSTEM POWER 11 650W
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Be quiet! SYSTEM POWER 11 650W
The Be quiet! SYSTEM POWER 11 650W PSU delivers stable and reliable power for modern PC builds. It meets ATX 3.1 standard specifications and uses DC-to-DC technology for precise voltage regulation. A 120mm fan takes care of cooling, with its speed automatically adjusting to the current temperature. The power supply's efficiency reaches up to 89.7%, as confirmed by its 80 PLUS Bronze certification. The PSU is equipped with a 12V-2x6 connector to power PCIe 5.1 standard graphics cards.
650W
Power
ATX
Form factor
80 PLUS Bronze
Certification
No
Modularity
Key features of the Be quiet! SYSTEM POWER 11 650W PSU
- Total power output of 650W
- Meets ATX 3.1 specification for modern builds
- Up to 89.7% efficiency confirmed by 80 PLUS Bronze certification
- 120mm fan with speed control for quiet operation
- Includes a 12V-2x6 connector for PCIe 5.1 standard graphics cards
- DC-to-DC technology for precise voltage regulation
- Integrates seven types of protection, including OVP, UVP and OCP
Choosing a power supply
When choosing a suitable PC power supply, the key parameter besides the form factor is its wattage. This indicates the maximum number of watts the power supply can continuously deliver to the components in your computer. It is a good idea to use a web-based calculator to work out the optimal wattage based on your chosen components.
PSU readiness and quiet operation
Full compliance with the ATX 3.1 standard defines its ability to handle the very high, short-term power spikes that occur with the latest graphics cards. This PSU handles short-term load jumps without any drop in power stability, supporting reliable component operation. A 120mm fan with a rifle-type bearing dissipates heat, ensuring quiet operation and a long lifespan. Its speed is controlled based on the PSU's internal temperature. This regulation system maintains low noise levels under low and medium loads, contributing to a quieter overall PC build during everyday work and relaxation. The fan's maximum speed is 2100 rpm.
Support for PCIe 5.1 graphics cards
The PSU includes a native 12V-2x6 connector that delivers up to 450W to power PCIe 5.1 standard graphics cards. The Be quiet! SYSTEM POWER 11 650W PSU also features two PCIe 6+2-pin connectors, which extend compatibility to older graphics accelerators. The integration of a modern connector simplifies cable management and contributes to a cleaner internal case layout. The 80 PLUS Bronze certification confirms high efficiency in converting electrical energy. At 50% load, the PSU's efficiency reaches a value of up to 89.7%. Higher efficiency means less waste heat generation and lower running costs.
Stable power with a comprehensive set of safety protections
The PSU uses a strong 12V rail that delivers up to 54.17A of current for the processor and graphics card. DC-to-DC technology provides precise voltage regulation on the secondary +3.3V and +5V rails. This design supports reliable and stable operation even when the computer faces an unexpectedly high load, and improves cross-load regulation. The power supply integrates a complete set of safety features to protect components against overvoltage, undervoltage, overcurrent, overload, short circuits, overheating, and inrush current. These mechanisms actively protect the connected hardware from damage and contribute to the long-term reliability of the entire system.
Topology and connector array
The internal design of this ATX 3.1 power supply is based on a Double Forward topology combined with DC-to-DC technology. The PSU's single strong 12V rail design enables reliable power delivery to high-performance components that require a stable and uninterrupted energy supply, especially under heavy load. In addition to the modern 12V-2x6 connector and two PCIe 6+2-pin connectors, the Be quiet! PSU offers five SATA connectors for hard drives and SSDs, one traditional Molex connector for older peripherals, and one EPS/CPU 4+4-pin connector to power the processor.
Fixed cabling and durability
The power supply has fixed cabling with sufficient length for installation in most standard cases. The main ATX 24-pin cable is sleeved for added protection. The flat design of the cables makes them easier to route behind the motherboard and helps maintain optimal airflow inside the PC case. The design of this quiet PSU allows for operation at an ambient temperature of up to 40°C. The mean time between failures (MTBF) exceeds 100000 hours when operating at a temperature of 25°C.
Package contents
- PSU
- Mounting screws
- Cable ties
- Power cable
- 1× ATX 24-pin
- 2× CPU 8-pin (4+4)
- 1× 12V-2x6 16-pin (12+4)
- 2× PCIe 8-pin (6+2)
- 5× SATA 15-pin
- 1× 4-pin Molex
80 PLUS certification in the European market
The 80 PLUS certification was created to objectively assess the efficiency of computer power supplies. This gives users a simple and clear way to compare different models. On the European market (where a 230V voltage is used), there are six levels of 80 PLUS certification with set 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
Listan GmbH, Wilhelm-Bergner-Str. 11, 21509 Glinde, Germany [email protected]
Specifications can be changed without notice. Images are for illustrative purposes only.
