This article covers be quiet! CPUクーラー 空冷 Pure Rock Pro 3 LX Black Intel 1851.

Overview

The be quiet! Pure Rock Pro 3 LX Black is a mid-range air CPU cooler that balances excellent acoustic performance with solid cooling capacity. It supports a wide array of sockets including Intel LGA1851 / LGA1700 / LGA1200 / LGA115x and AMD AM5 / AM4, making it compatible with the latest Core Ultra and Ryzen processors. Its compact height of 154mm fits most mid-tower cases while avoiding interference with tall memory modules. The single 120mm Light Wings LX PWM fan spins up to 2000 RPM yet stays remarkably quiet at 34.8 dBA maximum noise. Four direct-contact heat pipes and a black aluminum fin array handle up to 250W TDP, positioning this cooler as a cost-effective option for mainstream and enthusiast builds that prioritize silence.

Compatibility Guide

CPU sockets: Intel LGA1851, LGA1700, LGA1200, LGA1150, LGA1151, LGA1155; AMD AM5 and AM4. The included mounting kit works with all these sockets and installation is straightforward. The cooler is 154mm tall, so check your case's maximum CPU cooler clearance. Memory clearance is excellent – the offset design leaves the first DIMM slot unobstructed. The fan uses a standard 4-pin PWM connector and should be plugged into the CPU_FAN header on the motherboard. For CPUs with TDP up to 250W (e.g., Core i7 / Ryzen 7), this cooler is sufficient even under sustained load; for Core i9 / Ryzen 9 with default power limits, it still performs well, though overclocking would benefit from a larger cooler.

Product Info

Launched in early 2025, the Pure Rock Pro 3 LX Black (model BK043) is part of be quiet!'s established Pure Rock line. It is available through major retailers like Japan, with a street price around ¥8,061. The cooler is rated for 250W TDP, placing it in the upper mid-range segment. It comes with a 3-year warranty (subject to region). The single Light Wings LX fan includes ARGB lighting controlled via motherboard software. The black-coated heatsink provides a clean, modern look suitable for themed builds. This cooler competes with models like the Noctua NH-U12S redux and Cooler Master Hyper 212, offering comparable or slightly better thermal performance with superior noise characteristics.

Best Use Cases

Silent gaming rigs: The 34.8 dBA maximum noise means the fan is barely audible even under gaming load. Ideal for users building a quiet PC around Core i5/Ryzen 5 or even i7/Ryzen 7. Mid-tower builds with good airflow: The 154mm height fits most standard cases. The side-flow design works well when there's a rear exhaust fan to remove hot air. * Budget-conscious builders who want quality: This cooler offers a sweet spot between price and performance – no need for an expensive liquid cooler unless you're overclocking a high-end chip or need extreme low noise.

Things to Consider

Ensure your case has at least 160mm of CPU cooler clearance to allow for comfortable installation. Since it's a single-fan cooler, it won't overwhelm very high-TDP CPUs like the Core i9-14900K under all-core AVX loads; for such extreme scenarios, consider a dual-tower or 240mm AIO. The fan lacks PWM daisy-chain support, so you may need a Y-splitter if you want to add a second fan later (mounting holes are provided). Compared to the Noctua NH-U12A, the Pure Rock Pro 3 LX is slightly louder at max RPM but more affordable and includes ARGB lighting out of the box. Also note that the cooler's weight is moderate but not excessive – no risk of bending the motherboard if installed correctly.

Product Disclosure (Amazon)

  • Manufacturer: be quiet!
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B0H31VQQ52
  • Note: This article covers a manufacturer-made product based on Amazon listing details.