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Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Thermalright Assassin X 90 SE V2 CPU Cooler

Updated August 2026The Thermalright Assassin X 120R offers superior cooling performance and aesthetic appeal, making it the better choice for high-performance builds. However, the Assassin X 90 SE V2 is a solid budget option.

The Thermalright Assassin X 120R offers superior cooling performance and aesthetic appeal, making it the better choice for high-performance builds. However, the Assassin X 90 SE V2 is a solid budget option.

Why Thermalright Assassin X 120R Digital ARGB Black CPU Cooler is better

Cooling Performance

Higher airflow at 70.84 CFM

Aesthetic Appeal

Features digital ARGB lighting

Build Quality

Larger size for better heat dissipation

Why Thermalright Assassin X 90 SE V2 CPU Cooler is better

Price

Lower cost at C$24.90

Noise Level

Quieter operation at ≤23.85 dB(A)

Compact Size

Smaller dimensions for tight spaces

Overall score

Thermalright Assassin X 120R Digital ARGB Black CPU Cooler
85
Thermalright Assassin X 90 SE V2 CPU Cooler
75

Specifications

SpecThermalright Assassin X 120R Digital ARGB Black CPU CoolerThermalright Assassin X 90 SE V2 CPU Cooler
Fan Speed2000 RPM2200 RPM
Airflow70.84 CFM32.77 CFM
Noise Level≤29.8 dB(A)≤23.85 dB(A)
CompatibilityIntel LGA 1851/1700/1150/1151/1155/1156/1200, AMD AM4/AM5Intel 1150/1151/1155/1156/1200, AMD AM4/AM5
MaterialAluminumAluminum + Copper

Dimension comparison

Thermalright Assassin X 120R Digital ARGB Black CPU CoolerThermalright Assassin X 90 SE V2 CPU Cooler

Pricing Comparison

The Thermalright Assassin X 120R Digital ARGB Black CPU Cooler is priced at C$32.90, while the Thermalright Assassin X 90 SE V2 CPU Cooler comes in at a more budget-friendly C$24.90. This C$8.00 difference may influence your purchasing decision, especially if you're looking for an economical option without compromising too much on performance. The price difference reflects the varying features and specifications of each cooler, with the 120R offering advanced features that may justify its higher cost for some users.

Cooling Performance

The Thermalright Assassin X 120R is designed for superior cooling performance, boasting a fan speed of 2000 RPM and an air volume of 70.84 CFM. In contrast, the Assassin X 90 SE V2 has a maximum fan speed of 2200 RPM with an airflow of 32.77 CFM. Although the 90 SE V2 has a higher RPM, its lower airflow suggests that the 120R may provide more effective cooling overall due to its larger size and design. This is particularly crucial for users who demand optimal performance during gaming or heavy CPU tasks.

Build Quality and Design

Constructed with an all-aluminum design and featuring a digital ARGB lighting system, the Thermalright Assassin X 120R combines aesthetics with functionality. Its dimensions are 120x71x151mm, providing a considerable heat dissipation area. The Assassin X 90 SE V2, while slightly smaller at 94x77x118mm, also employs high-quality materials including aluminum and a copper treatment. The design of both coolers reflects Thermalright's commitment to quality, but the 120R's superior build may appeal to those who prioritise both performance and style.

Noise Levels

The Assassin X 120R operates at a noise level of ≤29.8 dB(A), which is relatively quiet for a cooler of its size and capability. The Assassin X 90 SE V2, on the other hand, operates at a lower noise level of ≤23.85 dB(A). While the 90 SE V2 is quieter, the difference is marginal, and the cooling performance of the 120R may outweigh the slight increase in noise for users who value performance over silence.

Compatibility

Both coolers offer wide compatibility with Intel and AMD sockets, supporting various generations of CPUs. The Assassin X 120R is compatible with Intel LGA 1851/1700/1150/1151/1155/1156/1200 and AMD AM4/AM5 sockets. The 90 SE V2 also supports Intel 1150/1151/1155/1156/1200 and AMD AM4/AM5. This broad compatibility ensures that both products cater to a wide range of PC builders, making either option a viable choice for those looking to upgrade their CPU cooling.

Installation Process

Installation for both coolers is designed to be user-friendly, with each product coming with the necessary mounting accessories. The Assassin X 120R includes a video or manual guide for setup, while the 90 SE V2 also provides installation instructions. However, the 120R's digital screen requires software installation via a 9-pin USB interface, which may add complexity for some users. It’s essential to consider your own comfort level with installation when deciding between the two, especially if you prefer a straightforward setup.

Aesthetic Appeal

The Thermalright Assassin X 120R stands out with its digital ARGB lighting that can sync with the motherboard, providing vibrant lighting effects. This makes it an attractive choice for users who want their build to look as good as it performs. In comparison, the Assassin X 90 SE V2 lacks such advanced lighting features, focusing instead on a more utilitarian design. If visual appeal is a significant factor in your decision, the 120R offers a more visually striking option.

Which should you buy?

In conclusion, the choice between the Thermalright Assassin X 120R and the Assassin X 90 SE V2 ultimately hinges on your specific needs and budget. If you prioritise cooling performance, aesthetics, and are willing to invest a little more, the Assassin X 120R is the way to go. However, if you're on a tighter budget and still need solid performance with quieter operation, the Assassin X 90 SE V2 presents an excellent value. Each cooler has its strengths, making either a commendable choice depending on your preferences.

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Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Thermalright Assassin X 90 SE V2 CPU Cooler | versusfinder