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100% modular cable managementThanks to fully modular cable management, cables that are not needed in the system are left out. As a result, the system always appears very tidy. Due to the less cluttered layout of the system, the air flow is more fluid, which means less noise and heat inside the housing. In addition, installation is much easier. |
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SilentWings 3 fanThe high-end SilentWings 3 fan delivers superior airflow while producing very little noise. Thanks to its unique and optimised blade design, durable dynamic fluid bearing system and 6-pole motor, this fan eliminates operating noise, with the added bonus of minimal energy consumption and a very long service life. In addition, the funnel-shaped fan opening allows for increased airflow resulting in higher cooling performance. |
80PLUS Gold CertificationThe be quiet! Straight Power 11 550W is 80PLUS Gold certified, with an efficiency of up to 93%. The main advantages are low power consumption and better, quieter cooling. |
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Wireless design inside the power supplyThe Straight Power 11 550W operates wirelessly on the DC side inside the power supply. This results in improved cooling airflow and limited signal disturbance due to the elimination of cables. This innovative design also results in longer component life. |
Innovative technologies and maximum compatibility for future systemsThe use of LLC and Synchronous Rectifier (SR) technology provides improved operating stability and voltage regulation. The power supply is equipped with a DC/DC converter that significantly improves voltage quality and stability at high loads. These technologies ensure safe operation for the next generation of processors and graphics cards. |
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Select your criteria
General information |
Product name |
be quiet! Straight Power 11 550W 80PLUS Gold |
Brand |
be quiet! | |
Model |
BN281 | |
Power and Efficiency |
Power |
550 W |
80 PLUS certification |
Yes | |
80 PLUS certification |
80 PLUS Gold | |
Connectivity |
Modular |
Yes |
Modularity |
100% modular | |
Power connector(s) |
1 X +12V (Power supply P8 - 2 x P4) | |
| 9 X Serial ATA power supply | ||
| 1 X ATX 20 + 4 Pin | ||
| 3 X Molex (4 Pin) Female | ||
| 2 X PCI Express 6 + 2 Pin | ||
Configurator |
PSU-CM compatibility |
+12V P4 |
| +12V P8 | ||
Cooling |
Fan size |
135mm |
Silent |
Yes | |
Power supply type (PC) |
Active | |
Design |
Power format |
ATX/EPS |
Power supply standard |
EPS12V | |
| ATX12V | ||
ATX 3.0 |
No | |
Multi-GPU |
SLI | |
| CrossFireX | ||
Typical use |
Desktop computer | |
Physical characteristics |
Color |
Black |
LED RGB |
No | |
Height |
86 mm | |
Width |
150 mm | |
Length |
160 mm | |
Weight |
2 kg | |
Warranties |
Commercial warranty |
Seller 3 years |
Legal warranty |
See terms & conditions |
See all be quiet! products
Product referenced on 23 Jan 2018
As said in another comment, lack of cable, I made a basic configuration and I can tell you that I don't have much cable left.
I've done a basic setup and I can tell you that I don't have a lot of cable left over, so it's hard to install them properly and make a good management cable.
If not, the power supply is silent.
I should have read the datasheet better for a modular power supply, it is too limited and clearly not modular (even my old fixed power supply has more choice in wiring), just the number of connections for a PC.
If you want to add a second graphics card forget it, no room on the PSU for a second cable, same for HDDs and other drives, I have 2 HDDs I had to use the same cable to power both.
For a few euros more you will find a version of this power supply that is much more flexible.
