be quiet! System Power B9 power supply unit 300 W 20+4 pin ATX ATX Grey
- 300 W 200 – 240 V 50 Hz
- Motherboard power connector: 20+4 pin ATX
- PC ATX 80 PLUS
- 12 cm
- Grey
Proven Reliability and Good Efficiency
Specially designed by be quiet! with the price-concious PC builder in mind: System Power B9 300W (bulk) offers renowned be quiet! performance and quietness and makes it possible for you to build cost-effective and reliable systems.
– Production-optimized bulk packaging
– Rock-solid stability with two strong 12V-rails
– Temperature-controlled 120mm fan reduces system noise
– Low stand-by drain of less than 0.13 watts
– Certified 80PLUS® efficiency (up to 87%)
– 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
| Power |
| Power protection features |
Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
| Hold time |
17 ms |
| Efficiency |
87% |
| Max output current (+5Vsb) |
2.5 A |
| Max output current (-12V) |
0.3 A |
| Max output current (+5V) |
15 A |
| Max output current (+12V2) |
14 A |
| Max output current (+12V1) |
18 A |
| Max output current (+3.3V) |
17 A |
| Combined power (+5Vsb) |
12.5 W |
| Combined power (-12V) |
3.6 W |
| Combined power (+5V) |
103 W |
| Combined power (+12V) |
276 W |
| Combined power (+3.3V) |
103 W |
| Power Factor Correction (PFC) type |
Active |
| Power factor |
0.95 |
| Input current |
2.5 A |
| AC input frequency |
50 Hz |
| AC input voltage |
200 – 240 V |
| Total power |
300 W |
| Ports & interfaces |
| Cabling type |
Non-Modular |
| CPU power cable length |
45 cm |
| CPU P4 connector (4-pin) |
1 |
| SATA power cable length |
400 mm |
| Number of PATA power connectors |
2 |
| Number of SATA power connectors |
4 |
| Motherboard power cable length |
45 cm |
| Motherboard power connector |
20+4 pin ATX |
| Performance |
| Silent mode |
Yes |
| ATX version |
2.4 |
| 80 PLUS certification |
80 PLUS |
| Power supply unit (PSU) form factor |
ATX |
| Purpose |
PC |
| Design |
| On/off switch |
Yes |
| Illumination |
No |
| Number of fans |
1 fan(s) |
| Fan diameter |
12 cm |
| Product colour |
Grey |
| Certificates |
| Certification |
CE, CB, TÜV, RCM, CU |
| Compliance certificates |
RoHS |
| Packaging content |
| Cables included |
AC |
| Weight & dimensions |
| Weight |
1.52 kg |
| Height |
86 mm |
| Depth |
140 mm |
| Width |
150 mm |
| Technical details |
| Sustainability certificates |
ENERGY STAR |
| Logistics data |
| Harmonized System (HS) code |
84733020 |
| Other features |
| Noise level (full-load mode, 100%) |
23.1 dB |
| Noise level (quiet mode, 50%) |
12.1 dB |
| Noise level (silent mode, |
11.6 dB |
