be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 vs Noctua NH-U9S chromax.Black,
Updated August 2026 — be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 leads on cooling performa and noise level.
The be quiet! Pure Rock Pro 3 offers better cooling performance and is more affordable, while the Noctua NH-U9S excels in compactness and quiet operation.
Why be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 is better
Price
Pure Rock Pro 3 is $20 cheaper
Cooling Performance
More heat pipes and larger fan
RAM Compatibility
Better compatibility with high-profile RAM
Why Noctua NH-U9S chromax.Black, is better
Compact Size
NH-U9S fits better in small cases
Noise Levels
Low-Noise Adaptor for quieter operation
Brand Reputation
Noctua has over 100 awards for performance
Overall score
Specifications
| Spec | be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 | Noctua NH-U9S chromax.Black, |
|---|---|---|
| Cooling Type | Air | Air |
| Socket Support | AM4, AM5, LGA1700 | AM4, AM5, LGA115x |
| Fan Speed | PWM | PWM |
| Warranty | 3 years | 6 years |
| Material | Copper, Aluminum | Copper, Aluminum |
Dimension comparison
Overview of the be quiet! Pure Rock Pro 3 Black and Noctua NH-U9S chromax.Black
The be quiet! Pure Rock Pro 3 Black is priced at $54.90, making it about 27% cheaper than the Noctua NH-U9S chromax.Black, which retails for $74.95. Both CPU coolers cater to users seeking efficient cooling solutions, but they differ in design, performance, and compatibility.
The Pure Rock Pro 3 features a robust design with six high-performance heat pipes and a 120mm fan, while the NH-U9S opts for a compact 92mm single-tower design. Each cooler appeals to different types of builds and user preferences, making their comparison crucial for potential buyers.
Cooling Performance
When it comes to cooling performance, the be quiet! Pure Rock Pro 3 is designed with six high-performance 6mm heat pipes that enhance its efficiency, particularly in overclocked systems. The combination of these heat pipes and a 120mm PWM fan ensures optimal airflow and cooling capacity.
In contrast, the Noctua NH-U9S employs a 92mm fan and is known for its award-winning NF-A9 design. While it may be smaller, it still delivers impressive cooling performance, particularly in compact builds where space is a constraint. The NH-U9S includes a Low-Noise Adaptor, allowing users to enjoy whisper-quiet operation at idle.
Size and Compatibility
The be quiet! Pure Rock Pro 3 has a compact offset design that significantly increases RAM and VRM cooler compatibility. This feature is particularly beneficial for users with high-profile RAM or a packed motherboard layout.
On the other hand, the Noctua NH-U9S is even more compact, designed to fit most tower cases without overhanging RAM slots or blocking PCIe slots, even on ITX motherboards. Its 125mm height ensures it remains a suitable choice for users with limited space, making it an excellent option for small form factor builds.
Installation Process
The installation process for the Pure Rock Pro 3 is straightforward, thanks to its self-explanatory mounting kit. This ease of installation can save time and reduce frustration for users who may not be as experienced with CPU cooler installation.
Conversely, the Noctua NH-U9S also boasts an easy installation process, supported by its SecuFirm2 mounting system, which is compatible with a range of Intel and AMD sockets, including AM5 and AM4. Both coolers are designed for user-friendliness, but the Pure Rock Pro 3 may have a slight edge due to its adjustable front fan height, accommodating various setups.
Noise Levels
In terms of noise levels, the be quiet! brand is synonymous with silent operation. The Pure Rock Pro 3 utilizes a PWM fan designed to maximize airflow while keeping noise to a minimum. This makes it an excellent choice for users who prioritize a quiet computing experience.
The Noctua NH-U9S is also renowned for its quiet operation, particularly with the inclusion of the Low-Noise Adaptor, which allows the fan to run at lower speeds when not under heavy load. Both coolers excel in this category, but the choice may come down to personal preference regarding brand reputation and specific use-case scenarios.
Aesthetic Appeal
Aesthetically, the be quiet! Pure Rock Pro 3 features a sleek black design that adds a touch of elegance to any build. Its striking appearance is complemented by functional design elements, such as the funnel-shaped air outlet that maximizes airflow over the fins.
The Noctua NH-U9S chromax.Black, in contrast, offers a more understated look while still maintaining a modern appeal. Its all-black design is versatile and complements various color schemes. Users looking for a cooler that blends seamlessly into their builds may prefer the NH-U9S, while those wanting a cooler that makes a statement might lean towards the Pure Rock Pro 3.
Brand Reputation
Both be quiet! and Noctua have established strong reputations in the cooling market. be quiet! is known for its emphasis on silent operation and reliability, while Noctua has garnered over 100 awards for its premium heatsinks, including the NH-U9S.
Choosing between these brands often comes down to personal preference and past experiences with their products. Users who value a quieter operation may lean towards be quiet!, while those who prioritize proven performance and efficiency might opt for Noctua.
Which should you buy?
Deciding between the be quiet! Pure Rock Pro 3 Black and the Noctua NH-U9S chromax.Black ultimately depends on your specific needs and preferences. The Pure Rock Pro 3 is about 27% cheaper and offers a more powerful 120mm cooling solution, making it ideal for users looking for high performance, especially in overclocked systems.
In contrast, the NH-U9S excels in compactness, fitting easily into smaller builds while maintaining excellent cooling performance and low noise levels. If space is a critical factor in your setup, the NH-U9S may be the better choice. Ultimately, both coolers have their strengths, so consider your build type, budget, and aesthetic preferences when making your decision.

