be quiet! System Power 11 450W 80PLUS Bronze Fully Wired ATX 3.1 PSU /
be quiet! System Power 11 450W is ATX 3.1 compliant and PCIe 5.1 compatible, 5-year manufacturer's warranty
Overall Rating: 3.9 / 5 (average from multiple review sources, as of 24 Jun 2026)
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be quiet! System Power 11 450W 80PLUS Bronze Fully Wired ATX 3.1 PSU /
Overall Rating: 4.8 / 5 (average from multiple review sources, as of 12 Jun 2026)
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be quiet! System Power 11 450W PSU 80 PLUS Bronze ATX3.1 PCIe 5.1 Power Supply - Black
Overall Rating: 4.3 / 5 (average from multiple review sources, as of 18 Jun 2026)
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be quiet! 450W System Power 11 Psu 80+ Bronze Fully Wired Temp-Controlled Fan At
Overall Rating: 1.4 / 5 (average from multiple review sources, as of 12 Jun 2026)
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Be Quiet System Power 11 450W Is Atx 3.1 Compliant And Pcie 5.1 Compatible 5-Ye
Overall Rating: 1.2 / 5 (average from multiple review sources, as of 22 Jun 2026)
Based on a total of 23,194 customer reviews from independent review platforms.
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be quiet! 450W System Power 11 Psu 80+ Bronze Fully Wired Temp-Controlled Fan At
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be quiet! 450W System Power 11 Psu 80+ Bronze Fully Wired Temp-Controlled Fan At
Overall Rating: 1.4 / 5 (average from multiple review sources, as of 12 Jun 2026)
Based on a total of 63 customer reviews from independent review platforms.
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be quiet! 450W System Power 11 Psu 80+ Bronze Fully Wired Temp-Controlled Fan At
Overall Rating: 1.4 / 5 (average from multiple review sources, as of 12 Jun 2026)
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The be quiet! System Power 11 450W (MPN BP009EU) is a reliable, entry-level internal power supply unit (PSU) ideal for mid-range desktop PCs. Certified 80 PLUS Bronze, it delivers stable 450?W output with ATX 3.1 compatibility and support for PCIe 5.1 GPUs via two 6+2-pin connectors. Its non-modular design with flat cables provides hassle-free installation and dependable performance. Key Features Power Output: 450?W continuous Certification: 80 PLUS Bronze (up to 89% efficiency at 230?V) Compliance: ATX 3.1, EPS 12V v2.92 PCIe Support: Supports PCIe 5.1 GPUs via 2 x 6+2-pin connectors Cooling: Temperature-controlled 120?mm rifle-bearing fan Protection Features: OCP, OVP, UVP, OPP, OTP, SCP, surge and inrush protection Cabling: Fully wired (non-modular) flat black cables Warranty: 5-year manufacturer’s warranty Full Technical Specification Model / MPN: System Power 11 450?W (BP009EU) Form Factor: ATX Compliance: ATX 3.1, EPS 12V v2.92 Power Output: 450?W continuous Efficiency Certificat
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Product Information
Weight & dimensions
| Weight | 1.7 kg |
| Height | 140 mm |
| Depth | 86 mm |
| Width | 150 mm |
Technical details
| Sustainability certificates | ENERGY STAR, ErP |
Packaging data
| Package width | 195 mm |
| Package depth | 268 mm |
| Package height | 97 mm |
| Package weight | 2.1 kg |
| Package type | Box |
Logistics data
| Shipping (inner) case length | 55.6 cm |
| Shipping (inner) case width | 31.1 cm |
| Shipping (inner) case height | 21.8 cm |
| Products per shipping (inner) case | 6 pc(s) |
| Shipping (inner) case gross weight | 13.6 kg |
Other features
| Cable ties included | Yes |
| Screws included | Yes |
Certificates
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
| Compliance certificates | CB, CE, RoHS, TÜV mark, UKCA, WEEE |
Design
| On/off switch | Yes |
| Fan speed | 0 - 1800 RPM |
| Number of fans | 1 fan(s) |
| Fan diameter | 12 cm |
| Cooling type | Active |
| Product colour | Black |
| Illumination | No |
Performance
| Mean time between failures (MTBF) | 100000 h |
| Bearing technology | Rifle |
| Noise level | 19.1 dB |
| 80 PLUS certification | 80 PLUS Bronze |
| EPS version | 2.92 |
| ATX version | 3.1 |
| Power supply unit (PSU) form factor | ATX |
| Purpose | PC |
Ports & interfaces
| Cabling type | Non-Modular |
| PCI Express connector | Yes |
| Motherboard power connector | 20+4 pin ATX |
| CPU power connector (4+4 pin) | Yes |
| PCI Express power connectors (6+2 pin) | 2 |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| Number of SATA power connectors | 5 |
Power
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush, Under voltage |
| Hold time | 16.86 ms |
| Efficiency | 89% |
| AC input voltage | 200 - 240 V |
| Total power | 450 W |
| Max output current (+5Vsb) | 3 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5V) | 20 A |
| Max output current (+12V1) | 37.5 A |
| Max output current (+3.3V) | 20 A |
| Combined power (+5Vsb) | 15 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5V) | 110 W |
| Combined power (+12V) | 450 W |
| Combined power (+3.3V) | 110 W |
| Number of +12V rail(s) | 1 |
| Power factor | 0.98 |
| Input current | 4 A |
| AC input frequency | 50 Hz |
Product information
At a glance
- Efficient power supply with 90% efficiency rating
- Compact design for easy installation and airflow
- Enhanced safety features for component protection
Note: This text was created with the help of AI.
Power Your PC with Confidence!
If you’re in the market for a reliable power supply unit (PSUs) that combines performance, efficiency, and quiet operation, then the be quiet! System Power 11 ATX 3.1 450W is perfect for you. This unit is designed for gamers, PC builders, and anyone who values a stable power supply while keeping their system noise to a minimum. Whether you're crafting a robust gaming rig or a work-from-home PC, this power supply offers the ideal balance of power and tranquillity, meeting the needs of various users across the board. For more options, check out our selection of PSUs.
Cutting-Edge Features for Optimal Performance
The be quiet! System Power 11 ATX 3.1 450W is packed with features that cater to modern computing demands. With its high efficiency rating of up to 90% (80 PLUS Bronze certified), you can enjoy reduced energy costs without sacrificing performance. The power supply comes with a robust 12V rail that provides stable power to your components, ensuring they perform at their best, even under heavy loads. Plus, the inclusion of a 120mm fan with a low-noise operation guarantees that your system runs cool and quiet, even during intense gaming sessions.
A Design Built for Efficiency and Aesthetics
This power supply unit doesn't just perform well—it looks great too! The be quiet! System Power 11 features a sleek, matte black finish that integrates seamlessly with any build aesthetic. Its compact design allows for easy installation in any standard ATX case, while the flat, black cables help reduce clutter and improve airflow within your system. The thoughtful design extends to its mounting options, providing flexibility to users setting up their systems in various configurations.
Safety and Reliability You Can Trust
Your components deserve the best protection, and the be quiet! System Power 11 ATX 3.1 450W offers just that. With built-in overvoltage, overcurrent, and short-circuit protection, you can rest easy knowing your investment is safeguarded against potential electrical issues. Additionally, it comes with a 3-year warranty, ensuring you have peace of mind as you power your systems. This power supply is not just a purchase; it’s an investment in the longevity and reliability of your PC.
Note: This text was created with the help of AI.
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