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be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 vs Thermalright Assassin X120 Refined SE CPU Air

Updated July 2026 — be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 wins on width and height, Thermalright Assassin X120 Refined SE CPU Air wins on length.

The be quiet! Pure Rock Pro 3 offers superior cooling performance and design, while the Thermalright Assassin X120 is a budget-friendly option. Choose based on your performance needs and budget.

Why be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 is better

Cooling Performance

6 heat pipes vs 4 heat pipes

Noise Levels

Optimized for silence

Design

Striking appearance and compact design

Why Thermalright Assassin X120 Refined SE CPU Air is better

Price

$17.90 vs $54.90

Weight

Lighter at 1.42 lbs

Installation

Standard metal fasteners

Overall score

be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6
85
Thermalright Assassin X120 Refined SE CPU Air
65

Specifications

Specbe quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6Thermalright Assassin X120 Refined SE CPU Air
Cooling TechnologyHDT with 6 pipesAGHP with 4 pipes
Max AirflowN/A66.17 CFM
Noise LevelN/A≤25.6 dB(A)
CompatibilityAM4/AM5, LGA 1700/1150/1151/1200AM4/AM5, LGA 1150/1151/1155/1156/1200/1700
Fan SpeedN/A1550 RPM

Dimension comparison

be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6Thermalright Assassin X120 Refined SE CPU Air

Overview of the Products

The be quiet! Pure Rock Pro 3 Black CPU Air Cooler is a high-performance cooling solution priced at $54.90, while the Thermalright Assassin X120 Refined SE CPU Air Cooler is significantly cheaper at $17.90. This price difference of about 67% raises questions about the features and performance of each cooler, making it essential to delve deeper into their specifications and capabilities.

Cooling Performance

The be quiet! Pure Rock Pro 3 features 6 high-performance 6mm heat pipes with HDT technology, designed to keep your CPU cool even under heavy loads or overclocking conditions. This advanced cooling capability is complemented by a 120mm PWM fan that optimizes airflow and minimizes noise. In contrast, the Thermalright Assassin X120 is equipped with 4 heat pipes and a TL-C12C PWM fan. While it boasts a maximum airflow of 66.17 CFM, its overall cooling performance may not match that of the Pure Rock Pro 3 due to fewer heat pipes and a lower RPM fan speed of 1550.

Noise Levels

Noise is a critical factor for many PC builders, and both coolers aim to provide a quiet operation. The be quiet! Pure Rock Pro 3, with its optimized fan blades and design, is engineered for silence, although specific noise levels were not provided in the data. The Thermalright Assassin X120, on the other hand, claims a noise level of less than 25.6 dB(A), making it a potentially quieter option. However, the overall effectiveness in noise reduction may largely depend on system configurations and workloads.

Design and Build Quality

In terms of design, the be quiet! Pure Rock Pro 3 boasts a striking appearance that combines elegance with robust performance. Its compact double-tower design enhances RAM and VRM compatibility, which is beneficial for users with tight spaces. The Thermalright Assassin X120, while effective, features a more utilitarian design with an aluminum heatsink cover. The choice between aesthetics and utilitarian design may influence a buyer's decision based on their build preferences.

Installation Ease

Both coolers are designed for easy installation. The be quiet! Pure Rock Pro 3 comes with a self-explanatory mounting kit, making the installation process straightforward. It also offers an offset mounting option for AMD AM5 CPUs, which is a thoughtful addition for better cooling over CPU hotspots. The Thermalright Assassin X120 includes metal fasteners compatible with both Intel and AMD platforms, ensuring a hassle-free installation. While both coolers excel in this area, the Pure Rock Pro 3's additional features for AMD users might provide an edge.

Compatibility

Compatibility is crucial when selecting a CPU cooler, and both products support a wide range of sockets. The be quiet! Pure Rock Pro 3 is compatible with AMD AM4 and AM5, as well as Intel LGA 1700, 1150, 1151, and 1200 sockets. Similarly, the Thermalright Assassin X120 accommodates AMD AM4 and AM5, along with Intel LGA 1150, 1151, 1155, 1156, 1200, and 1700. Both coolers provide extensive compatibility, making either a good choice for various builds.

Brand Reputation

Brand reputation can significantly impact purchasing decisions. be quiet! is known for its focus on silent operation and high-quality cooling solutions, which is reflected in the design of the Pure Rock Pro 3. Likewise, Thermalright has over 20 years of experience in the market, with a strong presence in the gaming community. Each brand's commitment to quality and innovation supports their respective products, appealing to different segments of users.

Price Comparison

The be quiet! Pure Rock Pro 3 is priced at $54.90, making it a premium option compared to the Thermalright Assassin X120, which is priced at only $17.90. This substantial price difference of about 67% may lead budget-conscious consumers to favor the Thermalright model, especially if they are not pushing their systems to extreme performance levels. However, for users seeking superior cooling performance and quieter operation, the investment in the Pure Rock Pro 3 may be justified.

Which should you buy?

Choosing between the be quiet! Pure Rock Pro 3 and the Thermalright Assassin X120 boils down to your specific needs and budget. If you prioritize high performance, advanced cooling technology, and aesthetic appeal, the be quiet! model is worth the investment at $54.90. However, if you are looking for a budget-friendly option that still offers decent cooling and quiet operation, the Thermalright Assassin X120 at $17.90 is an excellent choice. Ultimately, your choice will depend on whether you value performance and design over cost.