be quiet! System Power 9 400W CM Power Supply Unit

be quiet! System Power 9 400W CM Power Supply Unit

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technextday
Free delivery

£5115

£5115 Delivery included

Be Quiet! System Power 9 CM 400W Semi-Modular 80 Bronze PSU

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Price updated on August 6, 2025 at 5:56 PM

backtotheoffice
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£5120

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be quiet! System Power 9 400W CM

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Price updated on May 24, 2025 at 2:21 PM

quzo
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£5148

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be quiet! System Power 9 400W CM 400 W 200 - 240 V 50 Hz 4 A Active 103 W

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Price updated on September 2, 2025 at 2:48 PM

computersdeal
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£5672

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be quiet! System Power 9 400W CM

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Price updated on September 4, 2025 at 6:57 PM

itsupplies
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£5672

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be quiet! System Power 9 400W CM

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Price updated on September 2, 2025 at 5:41 PM

amazon
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£5999

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be quiet! BN300 System Power 9 400W CM, modular, 80 PLUS Bronze, power supply,Black

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Price updated on April 17, 2025 at 1:14 PM

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 Product Specifications


Brand

BE QUIET!

Category

PC Power Supply

Product listed on

April 9, 2025

EAN Code

4260052187210



The be quiet! System Power 9 400W CM is an exceptional power supply unit designed for users who demand reliability and efficiency in their computer systems. With its robust 400W capacity, this power supply is ideal for a wide variety of setups, from basic office machines to more demanding gaming rigs.

One of the standout features of the System Power 9 is its impressive energy efficiency. With an 80 PLUS Bronze certification, you can trust that this unit operates with minimal energy waste, translating to lower electricity bills and a reduced carbon footprint. This efficiency not only benefits the environment but also ensures that your computer runs cooler and quieter.

The semi-modular design of the be quiet! System Power 9 allows for easy cable management and improves airflow within your case. Unlike fully modular power supplies, this unit includes the essential cables pre-installed, while giving you the flexibility to add only the cables you need for your specific components. This means you can create a cleaner build with reduced clutter, enhancing both aesthetics and airflow.

Safety is paramount when it comes to powering your computer, and the System Power 9 does not disappoint. It features multiple protection mechanisms, including Over Voltage Protection (OVP), Under Voltage Protection (UVP), Short Circuit Protection (SCP), and Over Temperature Protection (OTP). These safeguards ensure that your valuable components are protected from electrical mishaps, providing peace of mind as you use your PC for gaming, work, or creative projects.

Installation is straightforward, making it suitable for both seasoned PC builders and novices alike. The included user manual guides you through the setup process, ensuring that you can get your system up and running with minimal hassle.

Furthermore, the 120mm fan incorporated in the design operates quietly, delivering efficient cooling without adding unnecessary noise to your environment. Whether you’re working late into the night or enjoying a gaming session, the System Power 9 ensures that your system runs smoothly and silently.

In summary, the be quiet! System Power 9 400W CM is more than just a power supply; it’s a reliable partner for your computing needs. With its combination of efficiency, safety features, and user-friendly design, this power supply unit is a smart investment for anyone looking to build or upgrade their PC. Explore the potential of your system with the be quiet! System Power 9 and experience the difference in performance and reliability it brings to your computing experience.



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