https://www.techpowerup.com/243190/d...nd-air-coolers

be quiet!, the market leader in PC power supplies in Germany for twelve consecutive years*, announces its Dark Rock 4 series of CPU air coolers for high performance processors. Dark Rock 4 and Dark Rock Pro 4 keep most of their predecessors' near-silent operation and performance features, but also introduce innovative and optimized functions that ultimately produce the best processor cooling at extremely low noise levels.
Single-tower Dark Rock 4 and dual-tower Dark Rock Pro 4 versions

Both next generation Dark Rock 4 CPU coolers maintain Dark Rock 3 series' high-performance benchmarks and the near-inaudible operation be quiet!'s products are known for. Thanks to a combination of new and optimized features, be quiet! manages to raise Dark Rock 4's supported thermal design power (TDP) to 200 watts, while still maintaining the same low noise level Dark Rock 3 was renowned for. The second model, be quiet's dual-towered Dark Rock Pro 4, provides a cooling performance for processors up to 250 watts TDP, matching its predecessor in performance, but at a lower noise level of just up to 24.3 db(A).