Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Thermalright Assassin King 120 SE ARGB CPU Air Cooler
Updated August 2026 — The Thermalright Assassin X 120R offers superior cooling performance and advanced features, making it the better choice for enthusiasts, while the Assassin King 120 SE is a solid budget option.
The Thermalright Assassin X 120R offers superior cooling performance and advanced features, making it the better choice for enthusiasts, while the Assassin King 120 SE is a solid budget option.
Why Thermalright Assassin X 120R Digital ARGB Black CPU Cooler is better
Cooling Performance
Higher fan speed and airflow
ARGB Features
Includes software control for lighting
Height
Greater height for better heat dissipation
Why Thermalright Assassin King 120 SE ARGB CPU Air Cooler is better
Price
Lower cost for budget-conscious buyers
Noise Level
Quieter operation at max load
Weight
Lighter design for easier installation
Overall score
Specifications
| Spec | Thermalright Assassin X 120R Digital ARGB Black CPU Cooler | Thermalright Assassin King 120 SE ARGB CPU Air Cooler |
|---|---|---|
| Airflow | 70.84 CFM | 66.17 CFM |
| Noise Level | 29.8 dB(A) | 25.6 dB(A) |
| Socket Support | LGA 1851/1700/1150/1151/1155/1156/1200, AM4/AM5 | 115X/1200/1700/17XX, AM4/AM5 |
| Max TDP | N/A | 125W to 235W |
| ARGB Control | Yes | No |
Dimension comparison
Introduction to CPU Coolers
When it comes to cooling your CPU, choosing the right cooler can significantly impact performance. The Thermalright Assassin X 120R Digital ARGB Black CPU Cooler and the Thermalright Assassin King 120 SE ARGB CPU Air Cooler are two strong contenders in the market, both offering unique features and benefits. In this comparison, we will delve into their specifications, performance, aesthetics, and overall value to help you decide which cooler best suits your needs.
Design and Build Quality
The design of a CPU cooler is essential not only for aesthetics but also for functionality. The Thermalright Assassin X 120R features an overall height of 151mm and is constructed with a symmetrical all-aluminum fin design, allowing it to maximize heat dissipation while fitting into most cases. In contrast, the Assassin King 120 SE has a slightly lower height of 148mm, which also enables compatibility with medium-sized cases. Both coolers employ aluminum as the primary heat sink material, ensuring durability and effective heat transfer, but the X 120R’s design may provide a slight edge in cooling efficiency due to its larger height and innovative structure.
Cooling Performance
Cooling performance is paramount for any CPU cooler, and the specifications indicate that both models can handle significant thermal loads. The Thermalright Assassin X 120R boasts a fan speed of 2000 RPM and an air volume of 70.84 CFM, yielding a wind pressure of 2.63 mm H2O. This translates to robust cooling capabilities, ideal for high-performance CPUs. Meanwhile, the Assassin King 120 SE operates at a lower fan speed of 1550 RPM with a maximum airflow of 66.17 CFM. While it still provides adequate cooling for CPUs with TDPs ranging from 125W to 235W, the X 120R clearly leads in raw performance metrics, making it a better choice for overclocking or more demanding applications.
Noise Levels
Noise levels are a crucial consideration when selecting a CPU cooler. The Thermalright Assassin X 120R operates at a maximum noise level of 29.8 dB(A), which is relatively quiet for a cooler of its performance class. On the other hand, the Assassin King 120 SE is designed to be quieter, with a maximum noise level of 25.6 dB(A). For users who prioritize a silent operation, the King may be the preferable choice, as it combines efficient cooling with lower noise output—ideal for quiet gaming or work environments.
ARGB Features
Aesthetic appeal can enhance the overall look of a gaming rig, and both coolers feature ARGB lighting. The Thermalright Assassin X 120R includes a digital screen and software capabilities, allowing for customizable light synchronization with the motherboard, creating a visually dynamic experience. The King 120 SE also features ARGB lighting but does not mention software control, which may limit customization options. If you are looking for a cooler that not only performs well but also enhances your build's aesthetics, the X 120R offers more advanced lighting features.
Compatibility
Compatibility with various CPU sockets is vital for ensuring a smooth installation process. The Thermalright Assassin X 120R supports a wide range of sockets, including Intel LGA 1851/1700/1150/1151/1155/1156/1200 and AMD AM4/AM5. Similarly, the Assassin King 120 SE is compatible with Intel 115X/1200/1700/17XX and AMD AM4/AM5 sockets. Both coolers come with the necessary installation accessories, making them versatile options for different system builds. However, the X 120R's broader compatibility may appeal to users with more diverse hardware.
Price Point
Price is a significant factor in any purchase decision. The Thermalright Assassin X 120R is priced at C$32.90, while the Assassin King 120 SE is more budget-friendly at C$24.59. This price difference of C$8.31 reflects the advanced features and higher performance specifications of the X 120R. While the King offers solid performance for its lower price, the X 120R’s additional capabilities may justify its higher cost for performance enthusiasts.
User Experience and Installation
User experience is often dictated by installation ease and overall satisfaction with performance. Both coolers come with installation accessories, but the ease of installation can vary based on individual setups. The Thermalright Assassin X 120R provides detailed instructions and installation videos, making it straightforward for users. Conversely, the King 120 SE also offers accessible installation but may not provide as comprehensive guidance. In terms of user feedback, both models have garnered positive reviews, but the X 120R's advanced features may lead to a more satisfying overall experience for those seeking top-tier performance.
Which should you buy?
Deciding between the Thermalright Assassin X 120R Digital ARGB Black CPU Cooler and the Thermalright Assassin King 120 SE ARGB CPU Air Cooler ultimately hinges on your specific needs and budget. If you are looking for superior cooling performance, advanced ARGB features, and broader compatibility, the Assassin X 120R is the better option, despite its higher price. However, if you’re aiming for a quieter operation and a more budget-friendly cooler that still offers decent performance, the Assassin King 120 SE is an excellent alternative. Each cooler has its strengths, but the X 120R stands out for those who prioritize performance and aesthetics in their builds.
versusfinder.com is a participant in the Amazon.ca Associates Program. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

