BE QUIET! 

BN515 be quiet! Straight Power 12 - power supply - 850 Watt

Mfg Part Number:  BN515  
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Price: $283.49 + Free Shipping
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Last Updated: Aug 07, 2025
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80 PLUS® PLATINUM CERTIFIED | Highly efficient operation

Straight Power 12 850W is certified with 80 PLUS Platinum and an energy efficiency rating of up to 94%. This provides lots of benefits for your high-end system, including less power consumption and an overall cooler and quieter operation.

FUTURE-PROOF YOUR SYSTEM | Fulfills all ATX 3.0 specifications

Straight Power 12 850W is an ATX 3.0 PSU and comes with both native integration of the 12VHPWR connector for next-generation PCIe 5.0 graphics cards, and 4 PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for powerful systems of today and the ones to come.

THE NEW STANDARD OF POWER | For massive transient loads

Straight Power 12 offers 850W of continuous power with one massive 12V rail. Even if the graphics card demands excessive power for a short time: Straight Power 12 850W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards.

SILENT WINGS FAN | Provides virtually inaudible operation

The high-end Silent Wings fan delivers best-of-class airflow yet produces very little noise. This is thanks to its unique, optimized fan blade design along with an advanced fluid-dynamic bearing and 6-pole fan motor that largely eliminates operational noise, has a super-long life and minimal

FLAWLESS COOLING CONCEPT | For a longer lifespan

The funnel-shaped fan inlet of the Straight Power 12 850W increases airflow while reducing unwanted turbulence for a higher cooling performance. The wire-free design inside allows the cool air to reach all components which ultimately leads to a longer lifespan.

STATE-OF-THE-ART TECHNOLOGIES | Rock-steady signal stability and efficiency

With full bridge LLC Straight Power 12 850W offers advanced technologies, resulting in higher efficiency, better regulation and lower ripple noise for an incomparably stable operation.

JAPANESE 105° CAPACITORS | A testament to high quality

Only premium components are used in Straight Power 12 850W. That is why this PSU features exclusively high-quality Japanese capacitors. They are rated at 105°C for stability, reliability, and a long operating life.

CONVENIENCE AND CONNECTIVITY | Maximum utility

Modular, sleeved cables of up to 100cm in length simplify component installation and reduce annoying clutter. This results in increased airflow and improved cooling - even in the largest PC cases.

Main Specification
General Information
Manufacturer Listan GmbH & Co.
Manufacturer Part Number BN515
Manufacturer Website Address http://www.listan.de
Brand Name be quiet!
Product Line STRAIGHT POWER 12
Product Model Straight Power 12 850W
Product Name STRAIGHT POWER 12 850W Power Supply
Package Type Retail
Packaged Quantity 6
Product Type Power Supply
Technical Information
Specification Compliance ATX 3.0
Specification Compliance EPS12V v2.92
Efficiency 94%
Number of Fans 1
Fan Diameter 135 mm
Protection Type Short Circuit
Protection Type Under Voltage
Protection Type Over Voltage
Protection Type Surge
Protection Type Over Power
Protection Type Over Temperature
Protection Type Over Current
Protection Type Inrush Current
Modular Yes
Reliability
MTBF 100000 Hour
Power Description
Number of +12V Rails 1
Input Voltage 230 V AC
Input Voltage 120 V AC
Output Voltage -12 V DC
Output Voltage 12 V DC
Output Voltage 5 V SB
Output Voltage 5 V DC
Output Voltage 3.3 V DC
Output Voltage Detail 5 V SB @ 3 A
Output Voltage Detail -12 V DC @ 0.5 A
Output Voltage Detail 5 V DC @ 25 A
Output Voltage Detail 3.3 V DC @ 25 A
Output Voltage Detail 12 V DC @ 70.8 A
Output Power 850 W
Input Frequency 60Hz
Interfaces/Ports
Number of SATA Power Connectors 9
PCI Express Connector Yes
Number of (6+2 pin) PCI Express Power Connectors 4
Number of (4+4 pin) CPU Power Connectors 1
Environmental Conditions
Maximum Operating Temperature 104°F (40°C)
Physical Characteristics
Color Family Black
Product Color Black
Form Factor Internal
Height 3.4"
Width 5.9"
Weight (Approximate) 3.99 lb
Miscellaneous
Package Contents
  • STRAIGHT POWER 12 850W Power Supply
  • Thumb Screws
  • Screws
  • Cable Ties
  • Velcro Cable Ties
  • User Manual Languages
  • OCK Slot Bracket with Switch / OCK Jumper
  • SFX-to-ATX Adapter Bracket
Certifications & Standards
  • BSMI
  • CB
  • CCC
  • CE
  • cRUus
  • cTUVus
  • CU
  • FCC
  • RCM
  • TÜV
  • UKCA
Energy Star Yes
Energy Efficiency Certification ENERGY STAR 8.0
Energy Efficiency Certification 80 Plus Platinum
Energy Efficiency Compliance Energy-related Products Directive (ErP)
Environmental Compliance Waste Electrical and Electronic Equipment Directive (WEEE)
Environmental Compliance Restriction of Hazardous Substances (RoHS)
Warranty
Limited Warranty 10 Year
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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