be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler

be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler Review & Specifications

The be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler by be quiet! is a Liquid CPU cooler designed for compatibility with 1851, 1700 , 1200, 1150, 1151, 1155, AM4, AM5, sTR4, sTR5 sockets.

This liquid cooler uses a high-efficiency CPU block made of Copper for optimal heat transfer. It features a 420 radiator with dimensions of 457 x 140 x 27, paired with 3 fan(s) of 140 mm each. The fan(s) operate at a maximum speed of 1900.0 RPM with a noise level of 34.3 dBA, achieving a total airflow of 78.4 CFM. Please ensure your PC case can accommodate the radiator size and mounting configuration. You can check compatibility with our PC Builder, which filters cases based on radiator size. This cooler does not include RGB lighting, focusing instead on performance, reliability, and low acoustic output. The cooler is backed by a 3-year warranty, providing long-term reliability and manufacturer support.

Performance

be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler is a high-end performance liquid CPU cooler built for CPUs with a TDP exceeding 200 W, delivering an excellent relative cooling performance score of 100.00%. It is particularly well-suited for high-end gaming PCs, as it helps exhaust heat directly outside the case, improving internal airflow and thermal headroom for powerful GPUs. While it can be used in workstation builds, caution is advised due to inherently lower reliability compared to air coolers. Liquid coolers offer top-tier thermal performance, often unmatched by air coolers, but come with increased complexity, more moving parts (such as the pump), a risk of coolant leakage, and a higher likelihood of requiring maintenance over time.

Cost-Effectiveness

The be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler achieves a moderate performance-to-price ratio of 29.4% when compared to the best-performing air cooler_selected. Note: While liquid coolers typically trail behind in value, this cooler still provides respectable efficiency and is suitable for those prioritizing quieter operation and improved aesthetics.