Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi vs Thermalright Assassin King 120 SE ARGB CPU Air Cooler
Updated August 2026 — The Thermalright Assassin X 120R offers superior features and performance, making it the better choice for enthusiasts. However, the Assassin King 120 SE is a solid budget option.
The Thermalright Assassin X 120R offers superior features and performance, making it the better choice for enthusiasts. However, the Assassin King 120 SE is a solid budget option.
Why Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi is better
higher fan speed
Assassin X 120R has a fan speed of 2000RPM compared to 1550RPM
digital display
Assassin X 120R features a digital screen for real-time monitoring
better heat pipes
Assassin X 120R uses upgraded AGHP technology for heat dissipation
Why Thermalright Assassin King 120 SE ARGB CPU Air Cooler is better
lower price
Assassin King 120 SE is priced at C$24.59
lightweight
Assassin King 120 SE weighs 0.52kg compared to 0.55kg
traditional design
Assassin King 120 SE has a classic cooler design with ARGB lighting
Overall score
Specifications
| Spec | Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi | Thermalright Assassin King 120 SE ARGB CPU Air Cooler |
|---|---|---|
| Fan Speed | 2000RPM | 1550RPM |
| Price | C$28.39 | C$24.59 |
| TDP Rating | N/A | 125-235W |
| ARGB Lighting | Yes | Yes |
| Socket Support | Intel & AMD | Intel & AMD |
Dimension comparison
Overview of the Thermalright Assassin X 120R Digital ARGB White CPU Cooler
The Thermalright Assassin X 120R Digital ARGB White CPU Cooler is priced at C$28.39 and offers a unique blend of performance and aesthetics. This cooler features a 2000RPM PWM fan, which ensures efficient heat dissipation while allowing real-time monitoring of CPU and GPU temperatures through its integrated digital screen. The 4 heat pipes utilize AGHP technology, enhancing heat transfer efficiency.
In contrast, the Thermalright Assassin King 120 SE ARGB CPU Air Cooler is available for C$24.59, making it a more budget-friendly option. Despite the lower price, it still provides effective cooling with a maximum fan speed of 1550RPM and utilizes the AGHP III technique for heat pipe performance.
Cooling Performance
Cooling performance is a critical factor for any CPU cooler, and both the Thermalright Assassin X 120R and the Assassin King 120 SE deliver in this regard. The Assassin X 120R's 2000RPM fan speed provides superior airflow, helping to maintain lower CPU temperatures during heavy usage. The combination of its efficient 4 heat pipes and PWM functionality allows it to adapt to varying thermal loads effectively.
Meanwhile, the Assassin King 120 SE, with a maximum fan speed of 1550RPM, offers solid cooling performance as well, rated for a thermal design power (TDP) of 125 to 235W. While it may not reach the same RPM as the Assassin X 120R, it still employs AGHP technology to mitigate the effects of gravity on heat dissipation, ensuring reliable performance in both vertical and horizontal orientations.
Design and Aesthetics
The design of the Thermalright Assassin X 120R is particularly striking, featuring a digital screen that displays real-time CPU and GPU temperatures, as well as usage data. This aesthetic element not only adds visual appeal but also enhances functionality, making it easier for users to monitor system performance at a glance.
On the other hand, the Assassin King 120 SE offers a more traditional cooler design with ARGB lighting effects. While it lacks the digital display feature of the Assassin X 120R, its colourful lighting still provides an attractive visual appeal. The choice between these two designs will largely depend on whether you prefer a high-tech aesthetic or a classic cooler with LED lighting.
Noise Levels
Noise levels are a significant consideration for many users, and both coolers perform admirably in this category. The Assassin X 120R's fan is designed to operate quietly, with enhanced features like silicone corner pads that help reduce noise from vibration. The PWM functionality also allows the fan to adjust its speed based on temperature, further minimising noise during low-load situations.
The Assassin King 120 SE claims a maximum noise level of 25.6dB(A), which is relatively quiet for a CPU cooler of its size. While it operates at a lower fan speed than the Assassin X 120R, its efficient design ensures that it remains unobtrusive even under load. Both coolers prioritise a quiet operation, appealing to users who value a peaceful computing environment.
Compatibility
Compatibility is essential for ensuring that a CPU cooler can fit a variety of systems. The Thermalright Assassin X 120R is designed with wide compatibility, supporting both Intel and AMD platforms. This cooler is equipped with mounting solutions for diverse CPU sockets, making it a versatile choice for many builds.
Similarly, the Assassin King 120 SE also supports multiple Intel and AMD socket types, including the latest AM5 and LGA1700 platforms. It comes with the necessary fasteners for easy installation. Both coolers cater to a wide range of users, ensuring that whether you are using a modern or older CPU, you should have no issues with compatibility.
Brand Reputation
Thermalright has established a strong reputation in the cooling solutions market, with over 20 years of experience. Both the Assassin X 120R and the Assassin King 120 SE benefit from this legacy, ensuring quality and reliability in their performance. The brand is known for its focus on research and development, which is evident in the innovative technologies used in both coolers.
While both products carry the Thermalright name, they cater to different market segments. The Assassin X 120R targets enthusiasts looking for advanced features like temperature monitoring, while the Assassin King 120 SE is aimed at users seeking solid performance at a more accessible price point.
Price Consideration
Price can often be the deciding factor when purchasing a CPU cooler. The Thermalright Assassin X 120R, priced at C$28.39, offers advanced features that justify its higher cost. Its digital display and superior fan speed provide additional value for users who are willing to invest in enhanced performance and monitoring capabilities.
Conversely, the Assassin King 120 SE is more budget-friendly at C$24.59, making it an excellent choice for users who need reliable cooling without extra features. This cooler still offers good performance and aesthetic appeal, striking a balance between functionality and price.
Which should you buy?
Choosing between the Thermalright Assassin X 120R and the Assassin King 120 SE ultimately depends on individual preferences and requirements. If you prioritise advanced features, such as real-time temperature monitoring and higher airflow, the Assassin X 120R is the better investment. However, if you are looking for a reliable cooler that performs well and fits a tighter budget, the Assassin King 120 SE is an excellent option. Both coolers are solid choices, but your specific needs will determine the best fit for your system.
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