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be quiet! BK021 Dark Rock 4 - CPU Cooler - 200W TDP Intel: LGA 1150 / 1151 / 1155 / 1156 / 1366 / 2011(-3) Square ILM / 2066 AMD: AM2(+) / AM3(+) / AM4 / FM1 / FM2(+)

Package: RETAIL
Ma Labs List#: 89423
Ma Labs SKU#: FAN-BK021
Mfr#: BK021

Mfr Warranty: 3 YEARS

  • Mfr Part Number: BK021
  • Features:
    • Virtually inaudible Silent Wings 135mm PWM fan
    • Achieves only 21.4dB(A) at maximum fan speed
    • Six high-performance copper heat pipes
    • Airflow-optimized, wave-contoured cooling fins
    • Easily installable black installation kit can be mounted from above
    • Supports an additional 120mm fan; clips are included in scope of delivery
    • Brushed aluminum top cover with diamond cut finish
    • German product conception, design and quality control 
  • Socket Type:
    • Intel: LGA 1150 / 1151 / 1155 / 1156 / 1366 / 2011(-3) Square ILM / 2066
    • AMD: Socket AM2(+) / AM3(+) / AM4 / FM1 / FM2(+)
  • Fan:
    • Model: Silent Wings 135mm PWM
    • Speed: 1400 RPM @ 100% PWM
    • Noise Level: 50% RPM - 10.5 dBA, 75% RPM - 15.6 dBA, 100% RPM - 21.4 dBA
    • Rated Voltage: 12 V
    • Input Current: 0.11 A
    • Input Power: 1.32 W
    • Bearing Type: Fluid Dynamic Bearing
    • Motor: 6-pole Fan Motor
    • Connector: 4 Pin PWM
    • Cable Length: 220 mm
    • Life Expectancy: 300,000 hours @ 25°C
    • Dimensions: 135.0 x 135.0 x 22.0 mm
  • Heatsink:
    • Heat Pipes Number / Diameter: 6x ø6 mm
    • Material: Copper Base / Aluminum Fins
    • Number of Fins: 51
    • CPU Contact Surface: CNC machined
    • Surface Treatment: Aluminum / black ceramic spray painted
    • Dimensions(W x L x H): 136.0 x 159.4 x 74.3 mm
  • Thermal Design Power: 200 W
  • Dimensions (WxLxH): 136.0 x 159.4 x 96.3 mm (Overall) (w/o mounting material)
  • Weight: 0.92 kg

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