Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi vs Thermalright SI-100 White ARGB CPU Air Cooler
Updated August 2026 — The Thermalright Assassin X 120R offers advanced features and a lower price, making it the better choice for most users. The SI-100 is compact and quiet, but lacks some of the Assassin's functionality.
The Thermalright Assassin X 120R offers advanced features and a lower price, making it the better choice for most users. The SI-100 is compact and quiet, but lacks some of the Assassin's functionality.
Why Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi is better
Advanced features
Digital screen for monitoring temperatures
Lower price
C$28.39 vs C$35.90
Better cooling tech
AGHP heat pipe technology enhances performance
Why Thermalright SI-100 White ARGB CPU Air Cooler is better
Compact design
Height of 100mm for smaller cases
Known noise levels
Maximum noise level of 27.7 dB(A)
Lightweight
Weighs only 0.64kg
Overall score
Specifications
| Spec | Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi | Thermalright SI-100 White ARGB CPU Air Cooler |
|---|---|---|
| Brand | Thermalright | Thermalright |
| Heat Pipes | 4x6mm | 6x6mm |
| PWM Fan | Yes | Yes |
| ARGB | Yes | Yes |
| Compatibility | Intel & AMD | Intel & AMD |
Dimension comparison
Introduction to CPU Coolers
When it comes to maintaining optimal performance in gaming and high-performance computing, choosing the right CPU cooler is crucial. In this comparison, we will examine the Thermalright Assassin X 120R Digital ARGB White CPU Cooler and the Thermalright SI-100 White ARGB CPU Air Cooler. Both products come from Thermalright, a brand with over 20 years of experience in computer accessory development, yet they cater to slightly different needs and preferences.
Design and Build Quality
The Thermalright Assassin X 120R features a sophisticated design with a digital screen top cover that displays critical temperature metrics, making it not only functional but visually appealing as well. This cooler is equipped with four 6mm heat pipes and a high-speed fan capable of 2000 RPM, ensuring efficient heat dissipation. On the other hand, the Thermalright SI-100 offers a more compact design with a height of just 100mm, making it suitable for smaller cases. Its build quality is also commendable, using industrial-grade materials while maintaining a lighter weight of 0.64kg.
Performance and Cooling Efficiency
In terms of performance, the Thermalright Assassin X 120R stands out with its advanced AGHP heat pipe technology, which enhances cooling efficiency by mitigating the effects of gravity on heat pipe performance. This model's fan operates at a maximum speed of 2000 RPM, ensuring effective heat dissipation even under heavy loads. Conversely, the Thermalright SI-100 also employs AGHP technology, but with 6x6mm heat pipes, making it slightly less efficient than its counterpart. However, it still achieves a commendable airflow of 72.37 CFM with a noise level of 27.7 dB(A), providing a quieter operation.
Noise Levels and Fan Performance
Noise levels are a significant consideration for many users. The Thermalright Assassin X 120R features a PWM fan that is designed to operate quietly, although specific noise levels are not disclosed. The incorporation of silicone corner pads helps to further dampen any unwanted noise during operation. In contrast, the Thermalright SI-100 boasts a maximum noise level of 27.7 dB(A), making it a relatively quiet option for users who are sensitive to sound. Both coolers are designed with efficient fan performance in mind, but the SI-100 provides a clear specification for noise, allowing users to make informed choices.
Installation and Compatibility
Both coolers offer wide compatibility with Intel and AMD sockets, ensuring they can fit a variety of systems. The Thermalright Assassin X 120R is designed to be compatible with dual platform setups, while the Thermalright SI-100 includes mounting plates for various CPU socket platforms such as Intel 1700 and AMD AM5. Installation is straightforward for both models, making them user-friendly options for builders of all levels. However, the SI-100’s compact design may provide additional ease for installations in tighter spaces.
Aesthetics and RGB Features
Aesthetic appeal is another critical factor when selecting a CPU cooler. The Thermalright Assassin X 120R comes with a digital ARGB feature that not only adds a modern touch but also allows users to monitor system temperatures visually. The digital screen enhances the cooler’s functionality while contributing to the overall look of the build. The Thermalright SI-100, while also featuring ARGB lighting, leans more towards a traditional design without the additional digital display. Both coolers provide RGB lighting options, but the Assassin X 120R takes the lead in terms of visual data presentation.
Price Comparison
Price is often a deciding factor in any purchase. The Thermalright Assassin X 120R is priced at C$28.39, making it a more budget-friendly option compared to the Thermalright SI-100, which retails for C$35.90. While both products fall within a similar price range, the Assassin X 120R’s lower price point may appeal to users looking for cost-effective cooling solutions without sacrificing performance.
Which should you buy?
In conclusion, the choice between the Thermalright Assassin X 120R and the Thermalright SI-100 ultimately depends on your specific needs. If you prioritize advanced features like a digital display for monitoring temperatures and a lower price, the Assassin X 120R is an excellent choice. However, if you prefer a compact cooler with known noise levels and still solid performance, the SI-100 may suit you better. Both coolers are effective, but your decision should align with your system requirements and personal preferences.
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.

