Thermalright Assassin King 120 SE White ARGB CPU vs Thermalright AXP90 X36 Low Profile ITX CPU Cooler,
Updated August 2026 — Thermalright Assassin King 120 SE White ARGB CPU wins on performance and cooling eff., Thermalright AXP90 X36 Low Profile ITX CPU Cooler, wins on noise level.
The Thermalright Assassin King 120 SE offers better airflow and aesthetic appeal, while the AXP90 X36 excels in compact builds and quieter operation.
Why Thermalright Assassin King 120 SE White ARGB CPU is better
Airflow
Assassin King has a maximum airflow of 66.17 CFM.
Aesthetics
Assassin King features striking white ARGB lighting.
Compatibility
Assassin King supports a wider range of CPU sockets.
Why Thermalright AXP90 X36 Low Profile ITX CPU Cooler, is better
Noise Level
AXP90 X36 operates at a quieter maximum noise level of 22.4 dB(A).
Size
AXP90 X36 has a low profile of just 36mm.
Installation
AXP90 X36 is easier to install in compact cases.
Overall score
Specifications
| Spec | Thermalright Assassin King 120 SE White ARGB CPU | Thermalright AXP90 X36 Low Profile ITX CPU Cooler, |
|---|---|---|
| Max Airflow | 66.17 CFM | N/A |
| Max Noise | 25.6 dB(A) | 22.4 dB(A) |
| Socket Support | Intel LGA 115X/1200/1700, AMD AM4 | Intel LGA 115X/1200, AMD AM4/AM5 |
| Fan Type | PWM | PWM |
| Cooling Type | Air | Air |
Dimension comparison
Overview of the Products
The Thermalright Assassin King 120 SE White ARGB CPU Air Cooler and the Thermalright AXP90 X36 Low Profile ITX CPU Cooler are both high-quality cooling solutions designed for different use cases. While the Assassin King is better suited for standard builds, the AXP90 X36 excels in compact ITX systems. With a price difference of approximately $0.57, the AXP90 X36 is priced at $20.39 compared to the Assassin King's $19.82, making the latter the slightly cheaper option.
Design and Aesthetics
In terms of design, the Thermalright Assassin King 120 SE features a striking white ARGB aesthetic, which enhances the visual appeal of any build. It measures 120mm in length, 73mm in width, and 148mm in height. In contrast, the AXP90 X36 boasts a remarkably low profile at just 36mm, making it ideal for space-constrained environments. The compact design may limit some aesthetic options, but its all-metal platform offers durability. The visual element of the Assassin King will likely attract gamers and PC enthusiasts looking for flair, while the AXP90 X36 prioritizes functionality in small cases.
Cooling Performance
Cooling performance is crucial for maintaining optimal CPU temperatures. The Thermalright Assassin King features five 6mm heat pipes and a PWM fan with a maximum airflow of 66.17 CFM, ensuring efficient cooling with a noise level of 25.6 dB(A). This makes it suitable for medium-sized cases where airflow is essential. The AXP90 X36, on the other hand, is equipped with four 6mm heat pipes and operates at a noise level of just 22.4 dB(A). Although it has a lower maximum airflow due to its compact size, it still delivers solid cooling performance in small form factor builds.
Compatibility
Compatibility is an important consideration when choosing a CPU cooler. The Thermalright Assassin King supports a wide range of CPU sockets, including Intel’s LGA 115X/1200/1700 and AMD’s AM4. This broad compatibility ensures it can fit into many different setups. The AXP90 X36, while also versatile, is specifically designed for low-profile builds, supporting the same Intel and AMD sockets but with an emphasis on space-saving installations. This makes it ideal for users with small cases or those aiming for a minimalist setup.
Installation Process
Both coolers are designed for ease of installation, but they cater to different user experiences. The Thermalright Assassin King comes with metal fasteners for both Intel and AMD platforms, promoting a straightforward setup for users. The dimensions and weight of 0.64 kg (1.4 lb) contribute to a stable installation, making it user-friendly for most PC builders. The AXP90 X36 also emphasizes an easy installation process, featuring a back plate fastener and a compact footprint that simplifies mounting in tight spaces. Users may find the installation process of the AXP90 X36 easier in smaller cases due to its low profile.
Noise Levels
When it comes to noise levels, both products perform admirably. The Thermalright Assassin King operates at a maximum noise level of 25.6 dB(A), which is relatively quiet for a cooler of its size and capacity. The AXP90 X36 outperforms in this category slightly, with a maximum noise level of just 22.4 dB(A). This lower noise output makes the AXP90 X36 a better choice for users who prioritize a silent computing experience, especially in smaller builds where noise can be amplified.
Price Comparison
The Thermalright Assassin King 120 SE is priced at $19.82, while the AXP90 X36 is listed at $20.39. This makes the Assassin King about 2.8% cheaper than the AXP90 X36. While the price difference is minimal, it may sway budget-conscious consumers. However, the additional features and benefits of each cooler can justify their respective prices depending on the user’s specific needs and case size.
Which should you buy?
Choosing between the Thermalright Assassin King 120 SE and the AXP90 X36 ultimately depends on your specific requirements. If you need a cooler that offers excellent airflow, aesthetic appeal, and compatibility with a variety of builds, the Assassin King is a strong choice. However, if you're working with a compact ITX case and value a quieter operation, the AXP90 X36 is the better option. Both products are quality offerings from Thermalright, and your decision should be guided by your case size, cooling needs, and noise preferences.

