Ever built a PC only to hear the PSU whine like a fan in a quiet room? You need power that stays out of the way and keeps your components safe. The be quiet! System Power 11 550W delivers quiet operation while protecting against over-current, voltage spikes and overheating. Its temperature-controlled 12 cm fan only spins when needed, so you get stable power without the noise.
be quiet! System Power 11 550W 80+ Bronze Fully Wired ATX 3.1 PSU, Power Supply
The be quiet! System Power 11 550W 80+ Bronze Fully Wired ATX 3.1 PSU, Power Supply is a non-modular unit designed for budget-friendly builds that still demand reliable protection. It supplies up to 550 W on a single +12 V rail, includes the essential connectors for CPU, GPU and storage, and meets ATX 3.1 standards.
Benefits
- Delivers quiet operation with temperature-controlled fan.
- Protects components with comprehensive over-current, voltage and surge safeguards.
- Provides 550 W on a single +12 V rail for modern GPUs.
- Supports ATX 3.1 for the latest motherboards and CPUs.
- Includes all necessary connectors without extra cables.
- Offers 89.7% efficiency to lower electricity costs.
Features
- 550 W continuous power output
- 80 PLUS Bronze certification
- 12 cm rifle bearing fan
- Non-modular fully wired cables
- Single +12 V rail, 45.83 A
- 24.2 dB maximum noise level
- be quiet! System Power 11 550W ATX 3.1
- 1.92 kg lightweight design
Specifications
| Power |
| Power protection features |
Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush, Under voltage |
| Efficiency |
89.7% |
| Hold time |
16.86 ms |
| Max output current (+5Vsb) |
3 A |
| Max output current (-12V) |
0.3 A |
| Max output current (+5V) |
20 A |
| Max output current (+12V1) |
45.83 A |
| Max output current (+3.3V) |
20 A |
| Combined power (+5Vsb) |
15 W |
| Combined power (-12V) |
3.6 W |
| Combined power (+5V) |
120 W |
| Combined power (+12V) |
550 W |
| Combined power (+3.3V) |
120 W |
| Number of +12V rail(s) |
1 |
| Power factor |
0.98 |
| Input current |
4 A |
| AC input frequency |
50 Hz |
| AC input voltage |
200 - 240 V |
| Total power |
550 W |
| Ports & interfaces |
| Cabling type |
Non-Modular |
| CPU power connector (4+4 pin) |
Yes |
| CPU P4 connector (4-pin) |
1 |
| PCI Express power connectors (12-pin) |
1 |
| PCI Express power connectors (6+2 pin) |
2 |
| Peripheral (Molex) power connectors (4-pin) |
1 |
| Number of SATA power connectors |
5 |
| Motherboard power connector |
20+4 pin ATX |
| Performance |
| Mean time between failures (MTBF) |
100000 h |
| Bearing technology |
Rifle |
| Noise level |
24.2 dB |
| EPS version |
2.92 |
| ATX version |
3.1 |
| 80 PLUS certification |
80 PLUS Bronze |
| Power supply unit (PSU) form factor |
ATX |
| Purpose |
PC |
| Design |
| On/off switch |
Yes |
| Fan speed |
0 - 1800 RPM |
| Number of fans |
1 fan(s) |
| Fan diameter |
12 cm |
| Cooling type |
Active |
| Product colour |
Black |
| Certificates |
| Compliance certificates |
CB, CE, RoHS, TÜV mark, UKCA, WEEE |
| Waste Electrical and Electronic Equipment (WEEE) compliance |
Yes |
| Weight & dimensions |
| Weight |
1.92 kg |
| Height |
140 mm |
| Depth |
86 mm |
| Width |
150 mm |
| Packaging data |
| Package type |
Box |
| Package weight |
2.3 kg |
| Package height |
97 mm |
| Package depth |
268 mm |
| Package width |
195 mm |
| Technical details |
| Sustainability certificates |
ENERGY STAR, ErP |
| Other features |
| Cable ties included |
Yes |
| Screws included |
Yes |
