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Be Quiet! 400W PSU - BN230 Straight Power 10 PSU, Fluid Dynamic Fan, 80+ Gold

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Be Quiet! Straight Power 10 400W PSU

World Class Quiet and Efficiency

be quiet! Straight Power 10 400W provides a new level of silent performance for systems that demand whisper-quiet operation without facing the slightest compromise in power quality. Our German team has updated and designed even more premium features into this generation of the Straight Power series, which make the Straight Power 10 400W more silent than ever and a clear ‘Best Choice’ for new systems and as a replacement in existing systems.
  • Virtually inaudible operation achieved through a broad array of meticulous optimizations, including use the of a be quiet! SilentWings® 3 135mm fan
  • SilentWings® 3 fan features an advanced fan frame, an airflow-optimized fan blade, fluid-dynamic bearing with copper core and a high-quality 6-pole motor for less vibration
  • The funnel-shaped fan opening of the PSU case is significant big and allows high airflow intake
  • 400 Watts of continuous power with stable four 12V-rail design
  • 80PLUS® Gold certification and up to 93% power conversion efficiency
  • Sleeved cable lengths for improved cooling and more attractive appearance
  • Product conception, design and quality control in Germany

• Advanced Multi-GPU gaming
• Extremely silent PC builds
• Multimedia systems and home theater
• Photo and video editing
Virtually Inaudible Operation
• Installed SilentWings® 3 135mm fan includes a wide array of electronic and mechanical optimizations for best-of-class airflow with very low noise production, including:
- unique airflow-optimized fan blade design reduces noise-generating fan turbulence
- advanced fluid-dynamic bearing with copper core provides for greatly reduced operating noise and super-long life
- 6-pole fan motor with high-quality IC controller reduces electrical noise, power consumption, and vibration. Lower starting voltage of the fan reduces significantly the starting fan speed and noise level at low load conditions
• Funnel-shaped fan opening of the PSU case is significant big and allows high airflow intake
• SilentWings® 3 fan is decoupled from the PSU body with special mount, further reducing transmission of vibration and noise
• Optimized PSU airflow design generates superior cooling at lower fan speeds and reduces turbulence around components, thus allowing even quieter operation
• Variable fan speed is optimally governed to strike the best balance between proper cooling and deep quietness
Energy Efficiency
• 80PLUS® Gold certification independently verifies the extremely high operating efficiency (up to 93%) of this design
• High efficiency means money savings, because your PC draws less power from the mains to do its work. This means less waste heat, less cooling required, and overall quieter operation
• Standby drain of less than 0.25 Watts (
• Meets Energy Star 6.0 guidelines
• Fulfills ErP 2014 guidelines
• Zero Load design supports Intel’s Deep Power Down C6 and C7 modes
• Fully Intel® Haswell compatible..
Product Description

Be Quiet! 400W PSU - BN230 Straight Power 10 PSU, Fluid Dynamic Fan, 80+ Gold


ATX 12V 2.4


400 W




1 x 20+4 Pin

SLI/CrossFire Support


Rail Design

Triple +12V

AC Input

AC 100-240 V


Active PFC

Fan Type

SilentWings 3 fan (fluid-dynamic bearing)


dB(A) at 20% load: 10.4


80 PLUS GOLD certified (up to 90%)


100,000 hours


Over current


Exceptionally quiet operation


2.02 kg

Package Weight

2.5900 kg


5 Years


Be Quiet! Straight Power 10