be quiet! DARK ROCK 4 BK021 135mm Silent CPU Cooler, High Performance

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The be quiet! DARK ROCK 4 BK021 135mm High-Performance Silent Air Cooler stands as the ultimate solution for enthusiasts and professional gamers seeking uncompromising thermal management with near-silent operation. Engineered by the renowned German brand be quiet!, this air cooler blends top-tier cooling performance with minimal noise, making it perfect for gaming rigs, powerful workstations, and demanding computing environments where both stability and tranquility are paramount. Technical excellence defines the DARK ROCK 4. It features a cutting-edge 135mm Silent Wings PWM fan, utilizing advanced fluid-dynamic bearing technology and a smooth 6-pole motor for maximum longevity—rated up to 300,000 hours at 25°C. Even at maximum speed, the fan operates at a whisper-quiet 21.4 dB(A), making it ideal for environments that demand silence, such as bedrooms, offices, and audio studios. The cooler incorporates six high-performance copper heat pipes (6mm diameter) that ensure rapid and efficient thermal transfer from your CPU. Its wave-contoured aluminum cooling fins maximize airflow and heat dissipation, while a special black ceramic coating not only enhances thermal conductivity but also adds a sleek, premium look to your system. Installation is straightforward thanks to the black mounting kit, which can be easily mounted from above. For users seeking even greater cooling potential, the DARK ROCK 4 supports an additional 120mm fan (mounting clips included), allowing you to boost performance in overclocked or heavily loaded systems. The brushed aluminum top cover with diamond cut accents delivers an elegant touch, complementing any high-end PC build. Compatibility is a key strength: the DARK ROCK 4 BK021 supports a wide range of AMD and Intel CPU sockets, including AMD AM2(+), AM3(+), AM4, FM1, FM2(+) and Intel 1200, 1150, 1151, 1155, 1156, 1366, 2011(-3) Square ILM, 2066, fitting most modern motherboards. With a maximum cooling capacity (TDP) of 200W, this cooler is ideal for high-performance CPUs and overclocked systems. To maintain optimal performance, it is recommended to periodically clean the cooler’s fins and fan with compressed air, preventing dust build-up. Always use high-quality thermal grease (included) during installation for the best heat transfer between your processor and the cooler. The DARK ROCK 4 BK021 comes with a three-year manufacturer’s warranty and is designed, engineered, and quality-controlled in Germany, ensuring reliability and premium craftsmanship. Whether for your office workstation, home PC, or professional gaming setup, this cooler guarantees efficient, silent cooling in any environment where performance and quietness matter most.

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Weight: 1.86 kg
Heat Pipe Diameter: 6 mm
Fin Material: Aluminum
Fan Size: 135 mm
Warranty: 3 years
Model: DARK ROCK 4 BK021
Cooling Type: Air
Number of Fans: 1 (supports additional 120 mm fan)
Fan Technology: Silent Wings with PWM, six-pole motor, Fluid Dynamic Bearing
Fan Lifespan: Up to 300,000 hours at 25°C
Maximum Noise Level: 21.4 dBA
Number of Heat Pipes: 6
Heat Pipe Material: High-efficiency copper
Outer Coating: Black ceramic coating
Top Cover: Brushed aluminum with diamond cut
Mounting: Black top-mount installation kit
CPU Socket Support: AMD: AM2(+), AM3(+), AM4, FM1, FM2(+); Intel: 1200, 1150, 1151, 1155, 1156, 1366, 2011(-3) Square ILM, 2066
Maximum Cooling Capacity (TDP): 200 W
Thermal Paste: Included

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