400W PSU - BE QUIET! System Power 9 - 80+ Bronze (Mid Gaming)
| Power Rating | 400W |
| Cooling | 120mm Fan |
| SATA Connectors | 6 |
| Molex Connectors | 2 |
| PCI-E Power | 2 x 6+2-Pin |
| CE Approved | Yes |
| Voltage Range | 200 - 240V |
SYSTEM POWER 9
500WProven Reliability and Good Efficiency
be quiet! System Power 9 400W offers renowned be quiet! reliability and quietness for price-conscious PC builders.
- Rock-solid stability with two strong 12V-rails
- DC-to-DC technology for tight voltage regulation
- Multi-GPU support with two PCIe connectors
- Temperature-controlled 120mm fan reduces system noise
- Stand-by drain of less than 0.15 watts
- 80PLUS® Bronze efficiency (up to 89%)
- Attractive black sleeved cables
- Complete suite of top safety features
- Meets latest Intel® C6/C7, ErP and Energy Star 6.1 guidelines
- 3-year manufacturer’s warranty
- Product conception, design and quality control in Germany
General data
| Model | System Power 9 | 400W |
| Continuous power (W) | 400 |
| Peak power (W) | - |
| Form factor ATX 12V | Version 2.4 |
| Form factor EPS 12V | - |
| Modular cable management | - |
| Topology | DC-DC |
| Wire-free design (DC-side) | - |
| Voltage (Vac) | 200-240 |
| Frequency (Hz) | 50 |
| Input current (A) | 4 |
| PFC | active |
| Power factor at 100% load | >0.95 |
| Compliant to Intel C6/C7 | ✓ |
| Power consumption in standby (W) | <0.15 |
| Average life time (h / 25°C) | 100.000 |
| Operating temperature up to (°C) | 40 |
Infographics
Output
| 12V rails (multi-rail operation) | 2 |
| 12V single rail operation | - |
| Overclocking key | - |
| +3.3V (A) | 24 |
| +5V (A) | 15 |
| +12V1 (A) | 24 |
| +12V2 (A) | 20 |
| +12V3 (A) | - |
| +12V4 (A) | - |
| +12V5 (A) | - |
| +12V6 (A) | - |
| -12V (A) | 0.3 |
| +5Vsb (A) | 3 |
| Max. combined power 12V (W) | 456 |
| Max. combined power 3.3V + 5V (W) | 110 |
| Hold-up time (ms @ 100%) | 17 @ 75% load |
Fan / Cooling technology
| 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 | 2,100 |
| Temperature control for case fans | - |
| dB(A) at 20% load | 11.1 |
| dB(A) at 50% load | 13.6 |
| dB(A) at 100% load | 28.2 |
Protection
| OCP (over current protection) | ✓ |
| OVP (over voltage protection) | ✓ |
| UVP (under voltage protection) | ✓ |
| SCP (short circuit protection) | ✓ |
| OTP (over temperature protection) | ✓ |
| OPP (over power protection) | ✓ |
