Key Specifications
Choose one or multiple features to search for items that have the same specifications.| Technical details | |
| Sustainability certificates | ENERGY STAR |
| Ports & interfaces | |
| Motherboard power connector | 20+4 pin ATX |
| Floppy drive power connector | 1 |
| Number of SATA power connectors | 6 |
| CPU power connector (4+4 pin) | ![]() |
| PCI Express power connectors (6+2 pin) | 2 |
| Cabling type | Semi-Modular |
| Number of PATA power connectors | 2 |
| Motherboard power cable length | 55 cm |
| SATA power cable length | 550,670 mm |
| CPU power cable length | 60 cm |
| PCI Express power cable length | 50 cm |
| Weight & dimensions | |
| Weight | 1.56 kg |
| Height | 86 mm |
| Width | 150 mm |
| Depth | 140 mm |
| Energy management | |
| Input current | 4 A |
| Nominal power | 500 W |
| Efficiency | 89% |
| Hold time | 17 ms |
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
| Power factor | 0.95 |
| Power Factor Correction (PFC) type | Active |
| Combined power (+3.3V) | 110 W |
| Combined power (+12V) | 456 W |
| Combined power (+5V) | 110 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 24 A |
| Max output current (+5V) | 15 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| AC input frequency | 50 Hz |
| AC input voltage | 200 - 240 V |
| Max output current (+12V2) | 20 A |
| Max output current (+12V1) | 24 A |
| Total power | 500 W |
| Packaging data | |
| Package weight | 2.22 kg |
| Package depth | 268 mm |
| Package height | 195 mm |
| Package width | 97 mm |
| Manual | ![]() |
| Package type | Box |
| Certificates | |
| Certification | CE, CB, TÜV, RCM, CU |
| 80 PLUS certification | 80 PLUS Bronze |
| Compliance certificates | RoHS |
| Packaging content | |
| Cables included | PCIe, SATA |
| Other features | |
| Screws included | ![]() |
| Noise level (quiet mode, 50%) | 11.5 dB |
| Noise level (full-load mode, 100%) | 24.4 dB |
| Noise level (silent mode, <30%) | 9.7 dB |
| Design | |
| Product colour | Black |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Fan diameter | 12 cm |
| Performance | |
| Compatible products | Intel C6/C7 |
| Purpose | PC |
| Bearing technology | Sleeve |
| ATX version | 2.51 |
| Power supply unit (PSU) form factor | ATX |
| Logistics data | |
| Master (outer) case height | 556 mm |
| Master (outer) case width | 311 mm |
| Master (outer) case gross weight | 14 kg |
| Master (outer) case length | 215 mm |
| Products per master (outer) case | 6 pc(s) |
| Harmonized System (HS) code | 84733020 |
| EAN | 4260052187227 |
| Warranty | 3 years |
The be quiet! System Power 9 Semi 500W PSU offers renowned be quiet! reliability and quietness for price-conscious PC builders. This power supply provides stable and dependable power for your CPU and GPU, making it suitable for entry-level gaming systems and multimedia PCs. It features rock-solid stability with two strong 12V rails and DC-to-DC technology for tight voltage regulation, even under heavy cross-loading conditions, ensuring reliable operation and making it ready for the next generation of processors and graphics cards.
Equipped with a temperature-controlled 120mm fan, the System Power 9 500W delivers the low noise operation that be quiet! is famous for. The 80 PLUS Bronze certification is convincing evidence of this PSU’s efficient and power-saving operation, realizing an efficiency rating of up to 89%. It also comes with high-quality black sleeved cables that add a touch of class to any PC system and a complete suite of top safety features, including OCP, OVP, OPP, OTP UVP and SCP, which provide the ultimate in secure operation.
Key Features- 500W Continuous Power
- 80 PLUS Bronze certified for up to 89% efficiency
- Semi-modular design with high-quality black sleeved cables
- Two PCIe connectors for powerful GPUs
- Equipped with a temperature-controlled 120mm fan for quiet operation
- DC-to-DC technology for tight voltage regulation under heavy cross-loading
- Two strong 12V rails
- Comprehensive protection features: OCP, OVP, OPP, OTP, UVP, and SCP
- Meets latest Intel C6/C7, ErP and Energy Star 6.1 guidelines
- Stand-by drain of less than 0.15 watts
- 3-year manufacturer’s warranty
- Product conception, design and quality control in Germany
- Power supply unit
- Modular cables
- Power cord
- Mounting screws
- User manual
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- leaflet (English)

