Pure Rock 2 Black is be quiet! 's CPU cooler for silent multimedia and graphics systems. It provides an excellent price-to-performance ratio with 150W TDP cooling efficiency, four 6mm heat pipes, a Pure Wings 2 120mm PWM fan and convenient design for mounting from atop the motherboard. Among the features that give it such an excellent price-to-performance ratio are: A high 150W TDP cooling efficiency, Four high-performance 6mm heat pipes with HDT technology, Asymmetrical construction avoids blocking memory slots, Pure Wings 2 120mm PWM fan for silent operation of max. 26. 8 dB(A), Airflow-optimized fan blades reduce noise-generating turbulence, Rifle bearing for a very long lifespan, Elegant black surface, Easily installable installation kit can be mounted from atop the mainboard, Three-year manufacturer's Product conception, design and quality control in Germany.