be quiet! Straight Power 11
550 WProduct details
The Straight Power 11 sets new standards for whisper-quiet systems without making even the slightest compromise in power supply. In developing this series generation, the German be quiet! team placed particular emphasis on noise-optimized features and high-quality equipment. All this makes the Straight Power 11 Series quieter than ever and the best choice for building new systems or upgrading existing ones. Straight Power 11 is the first choice among premium power supplies.
Almost inaudible SilentWings 3 135mm fan. Funnel-shaped air inlet on the power supply housing increases the airflow rate. Cordless design in the power supply unit on the DC side increases cooling and longevity. Fully modular cable management for maximum flexibility. 80PLUS Gold efficiency of up to 93%. Two PCI Express connectors for powerful multi-GPU systems. Japanese 105°C capacitors ensure stable, reliable operation. Meets ErP and Energy Star 6.1 guidelines. Five years manufacturer's warranty. Product conception, design, and quality control in Germany.
80 PLUS certificate | Gold |
Power protection features | EIA, OCP, OPP, OTP, OVP, SCP |
Form factor | ATX |
Internal connection options | 15-pin S-ATA (9x), 20+4 PIN ATX power connector (1x), 3-pin (3x), 4-pin floppy (1x), 4-pin Molex (3x), 4+4-pin 12V (1x), 6+2-pin PCI Express (2x) |
Modularity | Modular cable management |
Item number | 7478584 |
Manufacturer | be quiet! |
Category | Power Supply PC |
Manufacturer no. | BN281 |
Release date | 23.1.2018 |
Colour | Black |
Exact colour description | Black |
Form factor | ATX |
Efficiency | 91% |
80 PLUS certificate | Gold |
Modularity | Modular cable management |
Internal connection options | 15-pin S-ATA (9x), 20+4 PIN ATX power connector (1x), 3-pin (3x), 4-pin floppy (1x), 4-pin Molex (3x), 4+4-pin 12V (1x), 6+2-pin PCI Express (2x) |
Cooling method | Active cooling |
Number of fans | 1x |
Fan diameter | 135 mm |
LED colour | without LED |
Power protection features | EIA, OCP, OPP, OTP, OVP, SCP |
Power | 550 W |
CO₂-Emission | |
Climate contribution |
Scope of delivery | Power cable - 1.5 m |
Length | 16 cm |
Width | 15 cm |
Height | 8.60 cm |
Weight | 1510 g |
Product Safety |
Length | 34 cm |
Width | 26 cm |
Height | 12 cm |
Weight | 2.90 kg |
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Reviews & Ratings
Statutory warranty score
How often does a product of this brand in the «Power Supply PC» category have a defect within the first 24 months?
Source: Galaxus- 1.HP0,3 %
- 2.be quiet!1 %
- 2.Corsair1 %
- 4.Fortron1,1 %
- 4.Seasonic1,1 %
Statutory warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Galaxus- 9.Lian-Li3 days
- 9.NZXT3 days
- 11.be quiet!4 days
- 12.ASUS7 days
- 12.Seasonic7 days
Return rate
How often is a product of this brand in the «Power Supply PC» category returned?
Source: Galaxus- 1.Cooler Master2,5 %
- 2.MSI3,3 %
- 3.be quiet!3,7 %
- 3.Noctua3,7 %
- 5.Gigabyte3,8 %