Tired of noisy, unreliable power units that waste electricity and limit your PC’s performance? The be quiet! Pure Power 11, 400W, 100 - 240 V, 50 - 60 Hz, 6 A, Power Supply delivers stable, efficient power while staying whisper-quiet, perfect for quiet builds, gaming rigs or upgrades.
Usages of a 400W Power Supply
A reliable 400W power supply fits seamlessly into everyday PC tasks.
- Building a compact, silent home office PC.
- Upgrading an existing desktop for smoother multitasking.
- Powering a dual-GPU gaming system without overheating.
- Supplying a workstation for video editing or 3D rendering.
- Running a media centre PC that stays cool during long movies.
Why Choose a be quiet! Power Supply
If you need a power source that combines quiet operation with solid performance, you’ll appreciate the balance this unit offers. Many builders struggle with noisy fans or insufficient power headroom, leading to instability or higher electricity bills. This power supply’s 80 PLUS Gold efficiency and advanced regulation give you the confidence that your system will run smoothly, stay cool and cost less to run.
Key Features of a 400W Power Supply
- 80 PLUS Gold certification: 92 % efficiency. High efficiency reduces power waste and heat.
- Active PFC: 0.99 power factor. Improves electrical stability and lowers consumption.
- Dual 12 V rails: 24 A and 20 A. Provides reliable power for CPUs and graphics cards.
- Synchronous rectifier: stable operation. Enhances voltage regulation under load.
- DC-to-DC conversion: tighter voltage control. Keeps components safe during heavy use.
- 120 mm be quiet! fan: 10.5 dB silent mode. Keeps noise to a minimum.
- Non-modular cabling: 5 SATA, 2 PATA, 2 PCI-e connectors. Simplifies installation.
- Dimensions: 86 mm × 150 mm × 150 mm. Fits standard ATX cases easily.
- Weight: 1.93 kg. Light enough for easy handling yet robust.
- Noise levels: 14.9 dB full load, 11.4 dB 50 % load. Guarantees a quiet environment.
Benefits of be quiet! Power Supply
You’ll save on electricity bills thanks to the high 92 % efficiency, while the quiet fan lets you work or game without distraction. The robust protection features guard your components from spikes and overloads, reducing the risk of costly damage. Its compact size fits most cases, making upgrades hassle-free, and the reliable voltage regulation ensures stable performance for demanding applications.
Specifications
| Power |
| Power protection features |
Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
| Efficiency |
92% |
| Hold time |
29 ms |
| Max output current (+5Vsb) |
3 A |
| Max output current (-12V) |
0.3 A |
| Max output current (+5V) |
15 A |
| Max output current (+12V2) |
20 A |
| Max output current (+12V1) |
24 A |
| Max output current (+3.3V) |
24 A |
| Combined power (+5Vsb) |
15 W |
| Combined power (-12V) |
3.6 W |
| Combined power (+5V) |
120 W |
| Combined power (+12V) |
384 W |
| Combined power (+3.3V) |
120 W |
| Power Factor Correction (PFC) type |
Active |
| Power factor |
0.99 |
| Input current |
6 A |
| AC input frequency |
50 - 60 Hz |
| AC input voltage |
100 - 240 V |
| Peak power |
450 W |
| Total power |
400 W |
| Ports & interfaces |
| Cabling type |
Non-Modular |
| Floppy disk drive connector |
Yes |
| CPU power cable length |
6 cm |
| CPU power connector (4+4 pin) |
Yes |
| PCI Express power cable length |
50 cm |
| PCI Express power connectors (6+2 pin) |
2 |
| Peripheral (Molex) power connectors (4-pin) |
0 |
| SATA power cable length |
450,600,750 mm |
| Number of PATA power connectors |
2 |
| Number of SATA power connectors |
5 |
| Motherboard power cable length |
45 cm |
| Motherboard power connector |
20+4 pin ATX |
| Performance |
| Bearing technology |
Rifle |
| ATX version |
2.4 |
| 80 PLUS certification |
80 PLUS Gold |
| Power supply unit (PSU) form factor |
ATX |
| Purpose |
PC |
| Design |
| Number of fans |
1 fan(s) |
| Fan diameter |
12 cm |
| Product colour |
Black |
| Certificates |
| Certification |
ErP, WEEE |
| Compliance certificates |
RoHS |
| Safety regulation & standards |
| Safety |
CE, CB, TÜV, FCC, cTUVus, RCM, BSMI, CU, CCC |
| Weight & dimensions |
| Weight |
1.93 kg |
| Height |
86 mm |
| Depth |
150 mm |
| Width |
150 mm |
| Packaging data |
| Package type |
Box |
| Package weight |
2.22 kg |
| Package height |
96 mm |
| Package depth |
240 mm |
| Package width |
210 mm |
| Manual |
Yes |
| Technical details |
| Sustainability certificates |
ENERGY STAR |
| Other features |
| Noise level (full-load mode, 100%) |
14.9 dB |
| Noise level (quiet mode, 50%) |
11.4 dB |
| Noise level (silent mode, <30%) |
10.5 dB |
| Cable ties included |
Yes |
| Screws included |
Yes |
