Proven Reliability and Good Efficiency
Specially designed by be quiet! with the price-concious PC builder in mind: System Power U9 400W offers renowned be quiet! performance and quietness and makes it possible for you to build cost-effective and reliable systems.
- Rock-solid stability with two strong 12V-rails
- Equipped with DC-to-DC technology for tight voltage regulation
- Two PCIe connectors for support of powerful GPUs
- Temperature-controlled 120mm fan reduces system noise
- Low stand-by drain of less than 0.1 watts
- 80 PLUS® Bronze efficiency of up to 89%
- High-grade black cables
- Complete suite of top safety features
- Meets latest Intel® C6/C7, ErP and Energy Star 6.1 guidelines
- Supports latest Intel® and AMD™ processors
- 3-year manufacturer’s warranty
- Product conception, design and quality control in Germany
| Model | System Power U9 400W |
| Continuous power (W) | 400 |
| Peak power (W) | – |
| Form factor ATX 12V | Version 2.4 |
| Form factor EPS 12V | Version 2.92 |
| Modular cable management | – |
| Topology | DC/DC |
| Wire-free design (DC-side) | – |
| Voltage (Vac) | 100 – 240 |
| Frequency (Hz) | 50 – 60 |
| Input current (A) | 8 / 4 |
| PFC | active |
| Power factor at 100% load | >0.95 |
| Compliant to Intel C6/C7 | ✓ |
| Power consumption in standby (W) | <0.1 |
| Average life time (h / 25°C) | 100,000 |
| Operating temperature up to (°C) | 40 |
| 12V rails (multi-rail operation) | 2 |
| 12V single rail operation | – |
| Overclocking key | – |
| +3.3V (A) | 24 |
| +5V (A) | 15 |
| +12V1 (A) | 22 |
| +12V2 (A) | 18 |
| +12V3 (A) | – |
| +12V4 (A) | – |
| +12V5 (A) | – |
| +12V6 (A) | – |
| -12V (A) | 0.3 |
| +5Vsb (A) | 3 |
| Max. combined power 12V (W) | 384 |
| Max. combined power 3.3V + 5V (W) | 103 |
| Hold-up time at 100% load (ms) | 17 (@75% load) |
| Power good signal | 100 – 500ms |
| Fan type | High quality fan |
| +SilentWings | – |
| Motor technology | 4-pole fan motor |
| Bearing technology | Sleeve |
| Fan size (mm) | 120 |
| Max. fan speed (rpm), temperature-dependent | 2100 |
| Temperature control for case fans | – |
| dB(A) at 20% load | 13.71 |
| dB(A) at 50% load | 14.56 |
| dB(A) at 100% load | 19.63 |
| OCP (over current protection) | ✓ |
| OVP (over voltage protection) | ✓ |
| UVP (under voltage protection) | ✓ |
| SCP (short circuit protection) | ✓ |
| OTP (over temperature protection) | ✓ |
| OPP (over power protection) | ✓ |
| CE | ✓ |
| CB | ✓ |
| TÜV | ✓ |
| FCC | ✓ |
| cRUus | – |
| cTUVus | ✓ |
| RCM (Australia) | ✓ |
| BSMI | ✓ |
| CU (Russia) | – |
| CCC | ✓ |
| 80 PLUS certification | Bronze |
| Efficiency (%) at 230V, 20% load | 88 |
| Efficiency (%) at 230V, 50% load | 89 |
| Efficiency (%) at 230V, 100% load | 86 |
| ENERGY STAR | 6.1 |
| ErP | ✓ |
| WEEE | ✓ |
| RoHS | ✓ |
| Nvidia® SLI (RTX 3090) ready | – |
| Cable management | Fixed |
| Sleeved cables | Sleeved cables |
| Flat cables | P4+4 / PCIe / drives |
| Cable length to mainboard (cm) | 45 |
| Cable length to first connector (cm) | 35 |
| Maximum cable length (cm) | 91 |
| All-in-one cable (SATA/PATA/FDD) | – |
| No. of cables | 5 |
| ATX-Motherboard (20+4-pin) | 1 |
| P8 (CPU) | – |
| P4+4 (CPU) | 1 |
| P4 (CPU) | – |
| PCI-E 6-pin (GPU) | – |
| PCI-E 6+2-pin (GPU) | 2 |
| PATA | 2 |
| SATA | 5 |
| FDD (Floppy) | – |
| External fan connectors | – |
| Dimensions without cable (L x W x D), (mm) | 140 x 150 x 86 |
| Weight (kg) | 1.9 |
| Color | Black |
| Thumb screws | – |
| Screws | ✓ |
| Cable ties | – |
| Velcro cable ties | – |
| Box/Bag for PSU/Cables | – |
| User manual languages | CN, DE, EN, FR, JP, TW |
| OCK slot bracket with switch / OCK jumper | – |
| SFX-to-ATX adapter bracket | – |
| Article number | BN286 |
| EAN code | 4260052186206 |
| Dimensions, package (L x W x H), (mm) | 268 x 97 x 195 |
| Gross weight, package (kg) | 2.22 |
| Pieces per packaging unit | 6 |
| Dimensions, shipping box (L x W x H), (mm) | 215 x 311 x 556 |
| Gross weight, shipping box (kg) | 13.32 |
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