be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler vs Thermalright Assassin X120 Refined SE CPU Air
Updated July 2026 — be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler wins on width and length, Thermalright Assassin X120 Refined SE CPU Air wins on weight.
The be quiet! Dark Rock Pro 5 offers superior cooling performance and build quality, while the Thermalright Assassin X120 Refined SE is a budget-friendly option. Choose based on your cooling needs and budget.
Why be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler is better
Cooling Performance
Dark Rock Pro 5 handles peak loads better.
Build Quality
Premium materials and design in Dark Rock Pro 5.
Noise Levels
Quieter operation at high speeds with Dark Rock Pro 5.
Why Thermalright Assassin X120 Refined SE CPU Air is better
Price
Assassin X120 is significantly cheaper.
Weight
Lighter design in Assassin X120.
Size
More compact dimensions of Assassin X120.
Overall score
Specifications
| Spec | be quiet! Dark Rock Pro 5 Quiet Cooling CPU Cooler | Thermalright Assassin X120 Refined SE CPU Air |
|---|---|---|
| Max RPM | 2000 | 1550 |
| Noise Level | ≤24.0 dB(A) | ≤25.6 dB(A) |
| Heat Pipes | 7 | 4 |
| Material | Copper | Aluminum |
| Compatibility | Intel/AMD | Intel/AMD |
Dimension comparison
Overview of the Products
In this comparison, we will look at the be quiet! Dark Rock Pro 5 and the Thermalright Assassin X120 Refined SE, two CPU coolers designed for performance and efficiency. The Dark Rock Pro 5 is priced at $84.90, while the Assassin X120 Refined SE is significantly cheaper at $17.90, making it about 79% less expensive. This stark price difference sets the stage for a deeper examination of their capabilities and features.
Design and Build Quality
The be quiet! Dark Rock Pro 5 boasts a high-end design with a distinctive black coating that incorporates ceramic particles, enhancing its aesthetic appeal. In contrast, the Thermalright Assassin X120 Refined SE features an aluminum heatsink cover, which is also functional but does not carry the same premium feel. The Dark Rock Pro 5's construction includes seven high-performance copper heat pipes, which promote effective heat dissipation. The Assassin X120, while equipped with four heat pipes, uses AGHP technology to mitigate the inverse gravity effect, allowing for versatile installation.
Cooling Performance
When it comes to cooling efficiency, the Dark Rock Pro 5 is built for high-performance scenarios, capable of handling peak CPU loads even in overclocked systems. It features two Silent Wings PWM fans that can spin up to 2000 RPM in Performance Mode, allowing for significant airflow. On the other hand, the Assassin X120 has a maximum fan speed of 1550 RPM, which is sufficient for most standard applications but may struggle under extreme conditions. Therefore, the Dark Rock Pro 5 is better suited for users seeking maximum cooling performance.
Noise Levels
The Dark Rock Pro 5 is designed to operate quietly, with its fans optimized for low noise levels even at maximum speeds. The Silent Wings fans minimize turbulence through a decoupled mounting system, ensuring a quieter operation. The Assassin X120 also aims for a quiet experience, with noise levels rated at 25.6 dB(A). However, the higher RPM of the Dark Rock Pro 5 makes it a better choice for those particularly sensitive to noise, as it can maintain lower temperatures at a quieter performance level.
Ease of Installation
Installation is straightforward for both coolers, but the Dark Rock Pro 5 offers a more refined experience. Its detachable mesh top cover allows for easy fan installation from above, and the pre-installed mounting kit simplifies the setup process. The Assassin X120 also provides necessary mounting plates for different CPU socket types, but its design is less intuitive. Thus, while both are manageable, the Dark Rock Pro 5 may appeal more to users looking for a hassle-free installation experience.
Compatibility
The Dark Rock Pro 5 is compatible with a wide range of sockets, supporting both Intel and AMD platforms. It is particularly beneficial for users with high-end setups. The Assassin X120 also supports various Intel and AMD sockets, including the latest AM5 and LGA 1700. However, the Dark Rock Pro 5's broader compatibility and performance at high loads make it a more versatile choice for enthusiasts planning future upgrades.
Price Consideration
At $84.90, the Dark Rock Pro 5 represents a significant investment compared to the Assassin X120, which is priced at $17.90—nearly 79% cheaper. This drastic price difference might appeal to budget-conscious consumers or casual users who do not require top-tier cooling performance. However, for those who prioritize efficiency and performance, the additional cost of the Dark Rock Pro 5 could be justified.
User Experience and Feedback
While specific sales or bestseller ranks for both products were not provided, the reputation of be quiet! in the CPU cooler market suggests that the Dark Rock Pro 5 likely has a strong following among performance enthusiasts. Conversely, the Thermalright brand, with over 20 years of experience, has also established a notable presence, particularly among gamers and PC builders looking for value. User feedback generally highlights the Dark Rock Pro 5's superior cooling capabilities, while the Assassin X120 is praised for its affordability and decent performance.
Which should you buy?
Ultimately, the decision between the be quiet! Dark Rock Pro 5 and the Thermalright Assassin X120 Refined SE comes down to your specific needs and budget. If you are an enthusiast looking for top-tier cooling performance, quieter operation, and premium build quality, the Dark Rock Pro 5 is worth the investment. However, if you are a casual user or on a tight budget, the Assassin X120 offers solid performance at a fraction of the price, making it a very appealing option for everyday use.

