be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 vs Thermalright Peerless Assassin 120 SE V2 CPU
Updated August 2026 — be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 leads on design and performance.
The be quiet! Pure Rock Pro 3 excels in aesthetics and quieter operation, while the Thermalright Peerless Assassin offers excellent value at a lower price.
Why be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 is better
Cooling Efficiency
Superior cooling performance under heavy loads.
Noise Levels
Quieter operation compared to Peerless Assassin.
Design
More aesthetically pleasing with a compact design.
Why Thermalright Peerless Assassin 120 SE V2 CPU is better
Price
More affordable option for budget-conscious buyers.
Dual Fans
Better airflow with dual 120mm fans.
Heat Transfer
Improved heat transfer efficiency with dual tower design.
Overall score
Specifications
| Spec | be quiet! Pure Rock Pro 3 Black CPU Air Cooler | 6 | Thermalright Peerless Assassin 120 SE V2 CPU |
|---|---|---|
| Socket Support | AMD AM4/AM5, Intel LGA 1700/1150/1151/1200 | AMD AM4/AM5, Intel LGA 1851/1700 |
| Max RPM | 1500 | 1850 |
| Noise Level | Quiet | 29.5 dBA |
| Cooling Type | Air | Air |
| Material | Copper, Nickel | Copper |
Dimension comparison
Overview
The be quiet! Pure Rock Pro 3 Black CPU Air Cooler and the Thermalright Peerless Assassin 120 SE V2 CPU Cooler represent two strong contenders in the CPU cooling market. The Pure Rock Pro 3 is priced at $54.90, while the Peerless Assassin 120 SE V2 comes in at a lower price of $38.99, making it about 29% cheaper. Both coolers offer distinct features aimed at different user needs, making a direct comparison essential for potential buyers.
Design and Build Quality
In terms of design, the be quiet! Pure Rock Pro 3 features a striking appearance with a compact offset design that enhances RAM and VRM cooler compatibility. Its nickel-plated copper heat pipes and funnel-shaped air outlet are engineered for maximum airflow, ensuring efficient cooling. On the other hand, the Thermalright Peerless Assassin 120 SE V2 sports a dual tower design with six heat pipes that improve heat transfer efficiency. While both coolers are well-built, the Pure Rock Pro 3 emphasizes a sleek aesthetic, while the Peerless Assassin focuses on maximizing thermal performance through its dual tower structure.
Cooling Performance
Cooling performance is critical for any CPU cooler, and both products excel in this area. The Pure Rock Pro 3 is equipped with a 120mm PWM fan designed for optimized airflow and static pressure, which is essential for peak CPU performance, especially under heavy loads. In contrast, the Peerless Assassin offers dual 120mm PWM fans that can reach speeds of 1850 RPM, enhancing its cooling capabilities during demanding tasks. This dual-fan setup gives the Peerless Assassin an edge in balancing airflow and cooling performance, making it a robust choice for gaming and multitasking scenarios.
Compatibility
Both coolers boast broad compatibility with various CPU sockets. The be quiet! Pure Rock Pro 3 supports AMD AM4 and AM5, along with Intel LGA 1700, 1150, 1151, and 1200. Conversely, the Thermalright Peerless Assassin is compatible with AMD AM4 and AM5, as well as Intel LGA 1851 and 1700. Both coolers offer practical upgrades for modern desktop builds, but the Pure Rock Pro 3's wider range of Intel socket support makes it slightly more versatile for users with diverse setups.
Installation Process
The installation process for CPU coolers can often be a hassle, but both the Pure Rock Pro 3 and the Peerless Assassin aim to simplify this experience. The Pure Rock Pro 3 features a user-friendly mounting kit that makes installation easier than ever, even allowing for offset mounting to center the base plate above CPU hot spots. The Peerless Assassin also emphasizes straightforward installation but lacks the same level of detailed customization. Users looking for a hassle-free setup may find the Pure Rock Pro 3 to be the better option in this regard.
Noise Levels
Noise levels are a crucial factor for many PC builders, especially those who prefer a quiet working environment. The be quiet! Pure Rock Pro 3 is designed to operate quietly, utilizing its optimized fan blades to minimize noise while maintaining performance. While specific dBA ratings for the Pure Rock Pro 3 are not provided, its brand reputation for minimal noise is well noted. On the other hand, the Thermalright Peerless Assassin has a maximum noise level of 29.5 dBA at full speed, which, while not excessively loud, does indicate that it may produce more noise under heavy loads compared to the Pure Rock Pro 3.
Price and Value
The pricing of these two coolers reveals a significant difference, with the Thermalright Peerless Assassin priced at $38.99, making it about 29% cheaper than the be quiet! Pure Rock Pro 3 at $54.90. For budget-conscious consumers, the Peerless Assassin offers solid performance at a lower price point, but the Pure Rock Pro 3 justifies its higher cost with superior cooling efficiency, quieter operation, and a more aesthetically pleasing design. Ultimately, the decision of value will depend on what aspects are prioritized by the buyer.
User Experience and Feedback
User feedback often plays a significant role in the final decision-making process. While there are no specific sales or bestseller ranks provided for either cooler, the reputation of be quiet! typically garners positive reviews for performance and noise levels, aligning with its branding. The Thermalright Peerless Assassin has also received favorable comments, particularly for its cooling efficiency in high-load scenarios. Both products appear to deliver satisfactory experiences, but brand loyalty and specific user needs will influence individual preferences.
Which should you buy?
Choosing between the be quiet! Pure Rock Pro 3 and the Thermalright Peerless Assassin 120 SE V2 ultimately comes down to your specific needs and budget. If you prioritize aesthetics, quieter operation, and a slightly wider compatibility range, the Pure Rock Pro 3 is worth the investment despite its higher price. However, if you're looking for solid cooling performance at a lower price and can tolerate a bit more noise, the Peerless Assassin offers excellent value as a reliable, high-performance cooler.

