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The be quiet! Straight Power 11 modular power supply offers quiet operation without compromising on quality. Certified 80PLUS Platinum, it offers excellent energy efficiency. An ideal choice for quiet configurations, multi-GPU configurations, multimedia systems and systems for 3D photo/video applications.
Thanks to its fully modular management, the Straight Power 11 Platinum 's cables that serve no purpose in the system are left out. As a result, the system always looks 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.
The high-end SilentWings 3 fan delivers superior airflow with 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.
The be quiet! Straight Power 11 Platinum is 80+ Platinum certified, with a maximum efficiency of 93.7% to 94.1% depending on the model. The main advantages are low power consumption and better cooled, quieter operation.
The Straight Power 11 Platinum power supply operates wirelessly on the DC side inside the power supply unit. This results in improved cooling airflow and limited signal disruption due to the elimination of cables. This innovative design also results in longer component life.
Select your criteria
General information |
Product name |
be quiet! Straight Power 11 550W 80PLUS Platinum |
Brand |
be quiet ! | |
Model |
BN305 | |
Power and Efficiency |
Power |
550 W |
80 PLUS certification |
Yes | |
80 PLUS certification |
80 PLUS Platinum | |
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 |
None | |
Typical use |
Desktop computer | |
Physical characteristics |
Color |
Black |
LED RGB |
No | |
Height |
86 mm | |
Width |
150 mm | |
Length |
160 mm | |
Weight |
1.657 kg | |
Warranties |
Commercial warranty |
Seller 3 years |
Legal warranty |
See terms & conditions |
Product referenced on 22 Jan 2020
What can I say, except that the power supply card makes itself forgotten and provides the necessary current to the machine without noise. This model has served me well for all the time I didn't need more than 550W, over a little more than two years.
All good. The silence is finally there, you can hardly hear a little hum as 4 fans (from the same brand) are running: ventirad, input, extraction and power supply. I haven't yet tested any intensive work such as video rendering, but as I don't do much of that, it's not what matters most to me.
Working in silence without hearing the real blower that was my old PSU suits me perfectly.
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