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Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Thermalright SI-100 White ARGB CPU Air Cooler

Updated August 2026The Thermalright Assassin X 120R excels in cooling performance and aesthetics, while the SI-100 is more compact and quieter. Choose based on your specific needs.

The Thermalright Assassin X 120R excels in cooling performance and aesthetics, while the SI-100 is more compact and quieter. Choose based on your specific needs.

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

Cooling Performance

Assassin X 120R has higher air volume (70.84 CFM)

Height Compatibility

Assassin X 120R fits larger cases better (151mm height)

Aesthetics

Assassin X 120R features a digital ARGB top cover

Why Thermalright SI-100 White ARGB CPU Air Cooler is better

Noise Level

SI-100 operates quieter (27.7 dB(A))

Compact Size

SI-100 is shorter (100mm height)

Price

SI-100 is slightly cheaper at C$35.90

Overall score

Thermalright Assassin X 120R Digital ARGB Black CPU Cooler
85
Thermalright SI-100 White ARGB CPU Air Cooler
78

Specifications

SpecThermalright Assassin X 120R Digital ARGB Black CPU CoolerThermalright SI-100 White ARGB CPU Air Cooler
Max Airflow70.84 CFM72.37 CFM
Max Noise Level29.8 dB(A)27.7 dB(A)
Socket CompatibilityIntel LGA 1851/1700/1150/1151/1155/1156/1200; AMD AM4/AM5Intel 1150/1151/1155/1156/1200/1700/1851/2066/2011; AMD AM4/AM5
Installation EaseRequires original backplate for AMDIncludes metal fasteners for both
ARGB FeaturesDigital ARGB top coverStandard ARGB

Dimension comparison

Thermalright Assassin X 120R Digital ARGB Black CPU CoolerThermalright SI-100 White ARGB CPU Air Cooler

Introduction to CPU Coolers

When it comes to cooling your CPU, choosing the right cooler is essential for maintaining optimal performance and longevity. In this comparison, we will look at the Thermalright Assassin X 120R Digital ARGB Black CPU Cooler and the Thermalright SI-100 White ARGB CPU Air Cooler. Both products are renowned for their cooling efficiency and aesthetic appeal, but they cater to slightly different needs in terms of design and performance capabilities.

Design and Aesthetics

The Thermalright Assassin X 120R features a sleek black design with a digital ARGB top cover that enhances its visual appeal. With a height of 151mm, it combines performance and aesthetics, making it suitable for most cases without sacrificing cooling efficiency. In contrast, the SI-100, with its white finish and height of only 100mm, targets users looking for a compact cooler. Its minimalist design allows it to fit seamlessly into smaller cases. Thus, while both coolers are visually appealing, the choice largely depends on your case size and personal taste.

Cooling Performance

Cooling performance is a critical factor when selecting a CPU cooler. The Assassin X 120R has a maximum fan speed of 2000 RPM, providing an impressive air volume of 70.84 CFM, while maintaining a noise level of 29.8 dB(A). This combination ensures effective heat dissipation. On the other hand, the SI-100 also runs at 2000 RPM but offers a slightly higher air flow of 72.37 CFM and operates at a lower noise level of 27.7 dB(A). For those prioritizing quieter operation alongside effective cooling, the SI-100 may have a slight edge.

Compatibility

Compatibility is vital for ensuring that a CPU cooler works effectively with your system. The Assassin X 120R is compatible with both Intel (14th/15th Gen and earlier) and AMD Ryzen 7000 sockets, covering a broad array of CPUs. Meanwhile, the SI-100 also supports a wide range of Intel and AMD sockets, including the latest AM5 and LGA 1700. Both coolers come with mounting accessories for easy installation, making them suitable for various builds. However, the Assassin X 120R’s compatibility with newer generation CPUs may provide an advantage for future-proofing your setup.

Installation Process

When it comes to installation, both coolers are designed for user-friendly setup. The Assassin X 120R includes installation accessories and a guide for both Intel and AMD platforms, facilitating straightforward installation. Similarly, the SI-100 is equipped with metal fasteners for both Intel and AMD, ensuring a secure fit. However, users must note that the Assassin X 120R requires the original backplate from the motherboard for AMD installations, which might complicate installation slightly for some users compared to the SI-100.

Noise Levels

Noise levels greatly affect the overall user experience, particularly in quiet environments. The Assassin X 120R operates at a maximum noise level of 29.8 dB(A), which is relatively quiet for a cooler of its performance caliber. In comparison, the SI-100 registers a lower maximum noise level of 27.7 dB(A). Thus, if noise is a primary concern for your PC build, the SI-100 may be the better choice, as it provides effective cooling while operating more quietly.

Price Comparison

Pricing can often be a deciding factor when choosing between two products. The Thermalright Assassin X 120R is priced at C$32.90, while the SI-100 is slightly more expensive at C$35.90. While the difference of C$3.00 may seem minimal, it does reflect the varying features and designs of each cooler. If budget is a significant consideration, the Assassin X 120R offers excellent value for its performance and aesthetics.

User Reviews and Brand Reputation

Both products come from Thermalright, a brand with over 20 years of experience in the industry, known for quality and innovation. User reviews generally highlight the efficiency and reliability of both coolers. The Assassin X 120R is often praised for its superior heat dissipation and aesthetic design, while the SI-100 is commended for its compact size and quieter operation. The brand’s reputation adds a layer of confidence for consumers, ensuring that either choice will likely meet their cooling needs.

Which should you buy?

Choosing between the Thermalright Assassin X 120R Digital ARGB Black CPU Cooler and the Thermalright SI-100 White ARGB CPU Air Cooler largely depends on individual preferences and specific requirements. If you need a cooler that offers excellent cooling performance and aesthetic appeal in larger cases, the Assassin X 120R is the way to go. However, if you prioritise a quieter operation and a more compact design for smaller cases, the SI-100 is an excellent choice. Ultimately, both coolers deliver solid performance, making them worthy contenders in the CPU cooler market.

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Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Thermalright SI-100 White ARGB CPU Air Cooler | versusfinder