be quiet! Straight Power 11 power supply unit 550 W 20+4 pin ATX ATX Black
- Virtually inaudible operation thanks to a SilentWings® 3 135mm fan
- Big funnel-shaped fan opening of the PSU case for high airflow intake
- Wire-free on the DC side inside the PSU for enhanced cooling and longevity
- Full cable management for maximum build flexibility
- 80PLUS® Gold certification with an efficiency of up to 93%
- Advanced stability and voltage regulation thanks to LLC, SR and DC-to-DC
- Four high-performance 12V-rails
- Powerful multi-GPU support with two PCI-Express connectors
- Japanese 105°C-rated capacitors ensure stability and reliability
- Power signal stability unmatched in its class
- ErP and Energy Star 6.1 ready
- Product conception, design and quality control in Germany
World Class Quiet and Efficiency
be quiet! Straight Power 11 550W raises the bar for systems that demand virtually inaudible operation without power quality compromises. This PSU is clearly the best choice for super silent systems.
| Power |
| Power protection features |
Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
| Hold time |
18.9 ms |
| Efficiency |
93% |
| Max output current (+5Vsb) |
3 A |
| Max output current (-12V) |
0.3 A |
| Max output current (+5V) |
24 A |
| Max output current (+12V3) |
20 A |
| Max output current (+12V4) |
20 A |
| Max output current (+12V2) |
18 A |
| Max output current (+12V1) |
18 A |
| Max output current (+3.3V) |
24 A |
| Combined power (+5Vsb) |
15 W |
| Combined power (-12V) |
3.6 W |
| Combined power (+5V) |
130 W |
| Combined power (+12V) |
549.6 W |
| Combined power (+3.3V) |
130 W |
| Power Factor Correction (PFC) type |
Active |
| Power factor |
0.99 |
| Input current |
8 A |
| AC input frequency |
50 – 60 Hz |
| AC input voltage |
100 – 240 V |
| Peak power |
600 W |
| Total power |
550 W |
| Ports & interfaces |
| Cabling type |
Fully-Modular |
| Floppy disk drive connector |
Yes |
| CPU power cable length |
70 cm |
| CPU power connector (4+4 pin) |
Yes |
| PCI Express power cable length |
60 cm |
| PCI Express power connectors (6+2 pin) |
2 |
| SATA power cable length |
550 mm |
| Number of PATA power connectors |
3 |
| Number of SATA power connectors |
9 |
| Motherboard power cable length |
60 cm |
| Motherboard power connector |
20+4 pin ATX |
| Performance |
| Bearing technology |
FDB |
| Silent mode |
Yes |
| EPS version |
2.92 |
| ATX version |
2.4 |
| 80 PLUS certification |
80 PLUS Gold |
| Power supply unit (PSU) form factor |
ATX |
| Purpose |
PC |
| Design |
| On/off switch |
Yes |
| Illumination |
No |
| Number of fans |
1 fan(s) |
| Fan diameter |
13.5 cm |
| Product colour |
Black |
| Certificates |
| Certification |
CE, FCC, TÜV, cTUVus, RCM, BSMI, CU |
| Compliance certificates |
RoHS |
| Weight & dimensions |
| Weight |
1.51 kg |
| Height |
86 mm |
| Depth |
160 mm |
| Width |
150 mm |
| Packaging data |
| Package weight |
2.76 kg |
| Package height |
102 mm |
| Package depth |
328 mm |
| Package width |
248 mm |
| Manual |
Yes |
| Technical details |
| Sustainability certificates |
ENERGY STAR |
| Logistics data |
| Harmonized System (HS) code |
84733020 |
| Other features |
| Cable management |
Yes |
| Noise level (full-load mode, 100%) |
17.22 dB |
| Noise level (quiet mode, 50%) |
9.46 dB |
| Noise level (silent mode, |
9.02 dB |
| Cable ties included |
Yes |
| Screws included |
Yes |
