Tired of noisy, inefficient power bricks that waste electricity and raise your system’s temperature? The be quiet! Pure Power 11, 400W, 100 - 240 V, 50 - 60 Hz, 6 A, Power Supply delivers clean, reliable power while staying whisper-quiet, so your PC runs cooler and your energy bills stay low.
Benefits of be quiet! Power Supply
- Low electricity cost: 80 PLUS Gold efficiency up to 92 % reduces power waste.
- Quiet operation: fan noise as low as 10.5 dB in silent mode keeps your workspace peaceful.
- Stable performance: dual 12 V rails and active PFC maintain consistent voltage for demanding components.
- Comprehensive protection: safeguards against over-current, over-voltage, overheating and short circuits.
- Easy installation: high-quality sleeved cables and included ties speed up build time.
be quiet! Power Supply Experience
Using this unit feels effortless - the thermally controlled 120 mm fan only spins up when needed, delivering cool airflow without audible distraction. You’ll notice a steadier system under load, and the tidy, sleeved cabling gives your build a professional look while improving airflow inside the case.
Usages of a 400W Power Supply
Ideal for compact gaming rigs, quiet home PCs and multi-GPU setups that need reliable 400 W output, this supply fits ATX-compatible cases and supports modern processors and graphics cards without compromising silence.
Key Features of a 400W Power Supply
- Wattage: 400 W. Provides enough power for mid-range gaming and multimedia builds.
- Efficiency: 92 %. Ensures most of the drawn electricity is converted to usable power, lowering heat.
- Input voltage: 100 - 240 V. Works worldwide with any standard mains supply.
- Input frequency: 50 - 60 Hz. Compatible with regional power grid variations.
- Fan size: 12 cm. Small yet effective fan keeps the unit cool and quiet.
- Form factor: ATX. Fits standard PC cases and mounting points.
- Cable type: Non-Modular. Fixed cables simplify setup and reduce clutter.
- Connectors: 2 × 6+2 pin PCIe, 1 × 20+4 pin ATX, 5 × SATA, 2 × PATA. Supports multiple GPUs and storage devices.
- Weight: 1.93 kg. Light enough for easy handling but solidly built.
- Noise level (full load): 14.9 dB. Even at maximum output the unit remains barely audible.
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 |
