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Thermalright Assassin X 120R SE V2 CPU Cooler, 4× vs Thermalright AXP90 X36 Low Profile ITX CPU Cooler,

Updated August 2026 — Thermalright Assassin X 120R SE V2 CPU Cooler, 4× wins on design and cooling, Thermalright AXP90 X36 Low Profile ITX CPU Cooler, wins on size.

The Thermalright Assassin X 120R SE V2 offers superior cooling performance and compatibility, while the AXP90 X36 excels in compactness and quiet operation.

Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better

Cooling Performance

Higher fan speed and airflow

Dimensions

Better fit for medium cases

Aesthetic Appeal

Includes RGB lighting

Why Thermalright AXP90 X36 Low Profile ITX CPU Cooler, is better

Noise Levels

Quieter operation

Compact Design

Ideal for ITX builds

Installation

Easier in tight spaces

Overall score

Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
85
Thermalright AXP90 X36 Low Profile ITX CPU Cooler,
78

Specifications

SpecThermalright Assassin X 120R SE V2 CPU Cooler, 4×Thermalright AXP90 X36 Low Profile ITX CPU Cooler,
Fan Speed1550 RPMN/A
Airflow66.17 CFMN/A
Noise Level≤25.6 dB(A)≤22.4 dB(A)
Heat Pipes4×6mm4×6mm
CompatibilityIntel/AMDIntel/AMD

Dimension comparison

Thermalright Assassin X 120R SE V2 CPU Cooler, 4×Thermalright AXP90 X36 Low Profile ITX CPU Cooler,

Overview of the Thermalright Assassin X 120R SE V2 and AXP90 X36

The Thermalright Assassin X 120R SE V2 is priced at $16.59, while the Thermalright AXP90 X36 costs $20.39, making the Assassin X 120R SE V2 about 17% cheaper. Both products are crafted by Thermalright, a company known for producing high-quality CPU coolers designed for different use cases. The Assassin X 120R SE V2 is tailored for standard builds with its larger size and enhanced cooling capabilities, whereas the AXP90 X36 is a low-profile cooler ideal for compact ITX cases. This article will delve deeper into the specifications, performance, and suitability of each cooler.

Design and Dimensions

The Thermalright Assassin X 120R SE V2 features dimensions of 120x71x148 mm, making it a substantial cooler that fits comfortably in medium-sized cases. This height allows it to provide ample cooling without obstructing RAM slots. In contrast, the AXP90 X36 is a notably compact cooler with a total height of just 36 mm, designed specifically for ITX builds where space is at a premium. Its low profile makes it an excellent choice for small form factor systems, but this may come at the cost of cooling capacity compared to its taller counterpart.

Cooling Performance

In terms of cooling efficiency, the Thermalright Assassin X 120R SE V2 boasts a 1550 RPM fan speed and a maximum airflow of 66.17 CFM, ensuring robust cooling performance for high-demand CPUs. The AXP90 X36, on the other hand, has a noise level of ≤22.4 dBA and utilizes four 6 mm heat pipes, which contribute to its cooling effectiveness while maintaining a quieter operation. While both coolers excel in their respective categories, the Assassin X 120R SE V2 is likely to provide better cooling for high-performance CPUs due to its larger fan size and airflow capability.

Noise Levels

When it comes to noise levels, the Thermalright Assassin X 120R SE V2 operates at a maximum noise level of ≤25.6 dB(A), which is relatively quiet for a cooler of its size and performance. The AXP90 X36 is even quieter, with a maximum noise level of ≤22.4 dB(A). This makes the AXP90 X36 an attractive option for users who prioritize a silent computing experience, particularly in compact builds where every decibel counts.

Compatibility

Both coolers offer extensive compatibility with various CPU sockets. The Thermalright Assassin X 120R SE V2 supports a wide range of Intel sockets, including LGA 1150, 1151, 1200, and 1700, as well as AMD's AM4 and AM5 platforms. Similarly, the AXP90 X36 is compatible with Intel LGA 115X and 1200, along with AMD AM4 and AM5. This makes both coolers versatile options for users looking to upgrade or build a new system, ensuring they can accommodate a variety of CPUs.

Installation Process

The installation process for both coolers is designed to be user-friendly. The Thermalright Assassin X 120R SE V2 includes metal fasteners for easy installation on both Intel and AMD platforms. Additionally, it provides an installation video and instructions to guide users through the setup. The AXP90 X36 also features an all-metal platform with a backplate fastener, making it straightforward to install in tight spaces. Both products are engineered for compatibility with popular CPU sockets, reducing potential installation headaches for users.

Aesthetic Appeal

In terms of aesthetics, the Thermalright Assassin X 120R SE V2 includes a 120mm RGB PWM fan, allowing users to customize their system's lighting. This RGB feature can enhance the visual appeal of a gaming or high-performance rig. The AXP90 X36, however, maintains a more understated look, focusing on functionality over flashy appearances. Users who prefer a sleek, minimalist design may lean toward the AXP90 X36, while those wanting to showcase their builds with RGB lighting will appreciate the Assassin X 120R SE V2.

Which should you buy?

Choosing between the Thermalright Assassin X 120R SE V2 and the AXP90 X36 ultimately depends on your specific needs. If you're looking for a cooler that provides superior performance and compatibility with a variety of CPU sockets for a standard or gaming build, the Assassin X 120R SE V2, priced at $16.59, is an excellent choice. However, if your priority is building a compact ITX system with a low-profile cooler that operates quietly, the AXP90 X36, priced at $20.39, is well-suited for that purpose. Each cooler has its strengths, and your decision should be guided by your system requirements and personal preferences.