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

Updated August 2026The Thermalright Peerless Assassin 120 SE offers superior cooling performance and lower noise levels, making it the better choice for high-demand users. The Assassin X 120R is more budget-friendly with appealing aesthetics.

The Thermalright Peerless Assassin 120 SE offers superior cooling performance and lower noise levels, making it the better choice for high-demand users. The Assassin X 120R is more budget-friendly with appealing aesthetics.

Why Thermalright Peerless Assassin 120 SE CPU Cooler is better

Cooling Performance

Peerless Assassin has higher airflow and lower noise.

Build Quality

Peerless features a dual tower design with copper heat pipes.

Fan Speed

Peerless has dual fans with a lower noise level.

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

Price

Assassin X is more affordable.

Aesthetics

Assassin X has a digital screen and RGB synchronization.

Installation

Assassin X comes with installation accessories and manual.

Overall score

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

Specifications

SpecThermalright Peerless Assassin 120 SE CPU CoolerThermalright Assassin X 120R Digital ARGB Black CPU Cooler
Airflow66.17 CFM70.84 CFM
Noise Level25.6 dB(A)29.8 dB(A)
Fan Speed1550 RPM2000 RPM
CompatibilityIntel/AMDIntel/AMD
ARGB LightingDual FansDigital Screen

Dimension comparison

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

Introduction to Thermalright CPU Coolers

When it comes to efficient CPU cooling solutions, Thermalright has established itself as a reputable brand over the last 20 years. In this article, we will compare two of their popular models: the Thermalright Peerless Assassin 120 SE CPU Cooler and the Thermalright Assassin X 120R Digital ARGB Black CPU Cooler. Both coolers promise high performance but come with distinct features and price points.

Design and Build Quality

The Thermalright Peerless Assassin 120 SE boasts a dual tower heatsink design that enhances heat dissipation, measuring 125mm in length, 135mm in width, and 155mm in height. In contrast, the Assassin X 120R has a more compact size at 120mm x 71mm x 151mm. While both models utilise aluminium in their construction, the Peerless Assassin features a copper base with six heat pipes designed for rapid heat exchange. This ensures optimal cooling performance even under heavy loads, making it an excellent choice for gamers and content creators.

Cooling Performance

When it comes to cooling performance, the Peerless Assassin has an impressive maximum airflow rating of 66.17 CFM and operates at a noise level of 25.6 dB(A). This is complemented by its dual high-performance ARGB fans, which run at a speed of approximately 1550 RPM. On the other hand, the Assassin X 120R offers a slightly higher fan speed of 2000 RPM and an airflow of 70.84 CFM, albeit with a higher noise level of 29.8 dB(A). This means that while the Assassin X can move more air, it does so at a louder volume, which could be a consideration for those seeking quieter operation.

ARGB Lighting and Aesthetics

Both coolers feature ARGB lighting, but the implementation differs. The Peerless Assassin has two ARGB fans that provide colourful lighting effects, enhancing the visual appeal of your build. The Assassin X 120R takes it a step further with a digital screen that integrates ARGB lighting synchronisation, which can be controlled through motherboard software. This allows for a more customised lighting experience, making the Assassin X a more visually striking option for RGB enthusiasts.

Compatibility with CPU Sockets

In terms of compatibility, both coolers support a wide range of CPU sockets. The Peerless Assassin is compatible with Intel sockets LGA1150, 1151, 1155, 1156, 1200, 1700, and 1851, as well as AMD’s AM4 and AM5. Similarly, the Assassin X 120R supports Intel's 14th and 15th Generation sockets, along with AMD's Ryzen 7000 series, making both coolers versatile choices for various builds. However, both models require the use of the motherboard's original backplate for installation on AMD platforms, which is worth noting for potential buyers.

Installation Ease

Installation can be a deciding factor for many users, and both the Peerless Assassin and the Assassin X are designed with this in mind. The Peerless Assassin utilises an SS2 install system along with a metal pressure plate for easier mounting and optimal contact with the CPU. Meanwhile, the Assassin X comes with installation accessories and a manual, making it straightforward for users to follow along. However, the digital screen installation for the Assassin X may require additional steps, potentially complicating the setup for some users.

Price Comparison

When it comes to pricing, the Thermalright Peerless Assassin 120 SE is currently available for C$48.90, while the Assassin X 120R is priced at a more budget-friendly C$32.90. This price difference of C$16.00 makes the Assassin X a more appealing option for users looking for a cost-effective solution without compromising too much on performance. However, the additional features and cooling capacity of the Peerless Assassin may justify its higher price for those who require superior cooling.

Customer Reviews and Reputation

Both products come from the well-established Thermalright brand, known for its quality and performance. User feedback generally praises the Peerless Assassin for its cooling efficiency and low noise levels, making it a favourite among gamers. In contrast, the Assassin X is often highlighted for its aesthetic appeal and ease of installation, especially for those who appreciate RGB lighting. Overall, both models have garnered positive reviews, but user preference may vary based on individual needs and priorities.

Which should you buy?

Choosing between the Thermalright Peerless Assassin 120 SE and the Thermalright Assassin X 120R depends on your specific requirements. If you prioritise superior cooling performance and have a slightly higher budget, the Peerless Assassin is the way to go. However, if you're looking for a more affordable cooler with appealing aesthetics and decent performance, the Assassin X 120R is a solid choice. Ultimately, both coolers deliver excellent value in their own right, making them worthy contenders in the CPU cooling market.

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