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Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler Air with 6X6mm vs Thermalright SI-100 White ARGB CPU Air Cooler

Updated August 2026The Thermalright Peerless Assassin 120 offers superior cooling performance and quieter operation, making it the better choice for high-performance builds. The SI-100 is a great budget option for compact setups.

The Thermalright Peerless Assassin 120 offers superior cooling performance and quieter operation, making it the better choice for high-performance builds. The SI-100 is a great budget option for compact setups.

Why Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler Air with 6X6mm is better

Cooling Performance

Higher airflow of 88.89 CFM vs 72.37 CFM

Noise Level

Quieter operation at ≤25.6 dB(A) vs ≤27.7 dB(A)

Height Compatibility

Compatible with larger ATX cases, allowing for better component clearance

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

Price

More affordable at C$35.90 vs C$62.90

Compact Size

Lower height of 100mm fits smaller cases better

Installation Ease

Simpler installation process for smaller builds

Overall score

Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler Air with 6X6mm
85
Thermalright SI-100 White ARGB CPU Air Cooler
65

Specifications

SpecThermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler Air with 6X6mm Thermalright SI-100 White ARGB CPU Air Cooler
BrandThermalrightThermalright
Heat Pipes6x6mm6x6mm
Noise Level≤25.6 dB(A)≤27.7 dB(A)
PriceC$62.90C$35.90
Fan TypeDual FansSingle Fan

Dimension comparison

Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler Air with 6X6mm Thermalright SI-100 White ARGB CPU Air Cooler

Overview of Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler

The Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler is engineered for superior heat dissipation, featuring dual towers and dual fans. Priced at C$62.90, this cooler utilises a combination of six pure copper heat pipes and a copper base to ensure effective contact with the CPU, facilitating efficient heat transfer. With an operating noise level of ≤25.6 dB(A), it promises quiet operation while maintaining performance. The high-speed fans reach speeds of up to 1850 RPM and an impressive airflow of 88.89 CFM, making it a robust option for gamers and professionals alike.

Overview of Thermalright SI-100 White ARGB CPU Air Cooler

The Thermalright SI-100 White ARGB CPU Air Cooler offers a more compact solution for those with space constraints, retailing at a budget-friendly C$35.90. With a height of just 100mm, it is designed to fit into smaller chassis without compromising cooling efficiency. This cooler employs AGHP 3.0 technology and features six 6mm heat pipes that enhance thermal performance, ensuring a long service life of up to 20,000 hours. It also includes a PWM fan that operates at 2000 RPM with a maximum airflow of 72.37 CFM, striking a balance between cooling efficiency and noise levels of ≤27.7 dB(A).

Cooling Performance

The Thermalright Peerless Assassin 120 excels in cooling performance due to its dual-tower design and dual fans. With a maximum airflow of 88.89 CFM and fan speeds reaching 1850 RPM, it is built to handle high thermal loads effectively. This makes it suitable for overclocking and high-performance systems that demand robust cooling solutions. In contrast, the Thermalright SI-100, while still effective, has slightly lower airflow capabilities at 72.37 CFM and a higher fan speed of 2000 RPM, which may result in increased noise levels during operation. Thus, for users prioritising maximum cooling, the Peerless Assassin may be the better option.

Noise Levels

When evaluating noise levels, the Thermalright Peerless Assassin 120 operates at a quiet ≤25.6 dB(A), making it an excellent choice for those who value a silent computing environment. The dual fans are designed to minimise vibrations, contributing to overall quieter performance. The Thermalright SI-100, with a slightly higher noise level of ≤27.7 dB(A), still operates quietly for most users, but it may be more noticeable under load due to its higher RPM fan. Therefore, if silence is paramount, the Peerless Assassin has a clear advantage.

Size and Compatibility

In terms of size, the Thermalright Peerless Assassin 120 measures 138x125x162mm, making it compatible with most ATX chassis and ensuring ample space for high-capacity memory and graphics cards. Meanwhile, the Thermalright SI-100 is more compact at 120x108x100mm, making it ideal for small to medium cases. Its lower profile allows it to fit comfortably in tighter spaces, which is a significant advantage for users with limited room in their builds. This factor makes the SI-100 a great option for compact builds, while the Peerless Assassin is better suited for larger setups.

Installation Process

Both coolers come with user-friendly installation processes, but their design philosophies differ. The Thermalright Peerless Assassin 120 features a more complex dual-tower setup, which may require additional attention during installation to ensure proper alignment and cooling efficiency. However, it is designed for easy compatibility with mainstream ATX cases. On the other hand, the Thermalright SI-100's simple design and lower height facilitate easier installation, especially in smaller builds. Users who are less experienced with PC building may find the SI-100 to be a more straightforward choice.

Aesthetic Features

Aesthetically, the Thermalright Peerless Assassin 120 impresses with its sleek black design and digital ARGB capabilities. Its magnetic top cover adds a modern touch, allowing users to customise the look of their setup. This cooler not only performs well but also enhances the visual appeal of a gaming rig. The Thermalright SI-100, while also featuring ARGB lighting, presents a cleaner white finish that could appeal to users looking for a lighter aesthetic. Both coolers offer unique visual features, but the choice may come down to personal preference regarding colour schemes.

Which should you buy?

Choosing between the Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler and the Thermalright SI-100 White ARGB CPU Air Cooler ultimately depends on your specific needs and preferences. The Peerless Assassin is the superior choice for high-performance builds that require maximum cooling efficiency, making it ideal for gamers and power users willing to invest C$62.90. In contrast, the SI-100 offers excellent value at C$35.90, making it suitable for smaller cases or budget builds without sacrificing decent cooling performance. If space is a constraint or budget is a primary concern, the SI-100 is the way to go; however, for those demanding top-tier cooling, the Peerless Assassin stands out as the better option.

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Thermalright Peerless Assassin 120 Digital ARGB Black CPU Cooler Air with 6X6mm vs Thermalright SI-100 White ARGB CPU Air Cooler | versusfinder