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

Updated August 2026 — Thermalrlght Peerless Assassin 120 SE CPU Air leads on cooling power and build quality.

The Thermalright Assassin X 120R offers great value and effective cooling, while the Peerless Assassin 120 SE excels in performance with advanced features.

Why Thermalright Assassin X 120R Digital ARGB Black is better

Price

Assassin X 120R is significantly cheaper.

Design

Digital screen adds aesthetic appeal.

Noise

Potentially quieter operation.

Why Thermalrlght Peerless Assassin 120 SE CPU Air is better

Cooling

More heat pipes for better heat dissipation.

Fans

Dual fans provide higher airflow.

Build

Soldered heatsink base enhances performance.

Overall score

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

Specifications

SpecThermalright Assassin X 120R Digital ARGB BlackThermalrlght Peerless Assassin 120 SE CPU Air
Heat Pipes46
Fan Speed2000 RPM1550 RPM
Noise LevelN/A25.6 dB(A)
ARGBYesNo
CompatibilityAM4/AM5, Intel LGAAM4/AM5, Intel LGA

Dimension comparison

Thermalright Assassin X 120R Digital ARGB BlackThermalrlght Peerless Assassin 120 SE CPU Air

Overview of the Products

The Thermalright Assassin X 120R Digital ARGB Black CPU Air Cooler and the Thermalrlght Peerless Assassin 120 SE CPU Air Cooler represent two solid options in the CPU cooling market. The Assassin X 120R is priced at $22.90, while the Peerless Assassin 120 SE is available for $32.90, making the latter about 43% more expensive. Both coolers target users seeking effective thermal management, but they do so with different designs and features.

Cooling Performance

When it comes to cooling performance, the Peerless Assassin 120 SE boasts a more sophisticated setup with six heat pipes compared to the Assassin X 120R's four. This gives the Peerless model an edge in heat dissipation capability, particularly under heavy loads. The six heat pipes are designed to facilitate rapid heat exchange, while its dual 120mm TL-C12C PWM fans can achieve a maximum airflow of 66.17 CFM at a noise level of 25.6 dB(A). In contrast, the Assassin X 120R features a single 12cm PWM fan with a maximum speed of 2000 RPM. While both coolers effectively manage CPU temperatures, the additional heat pipes and dual fans of the Peerless Assassin provide a more robust cooling solution.

Design and Aesthetics

In terms of design, the Assassin X 120R incorporates a digital screen on its top cover, which enhances its visual appeal and offers a modern touch. This cooler is designed with a height of 151mm, making it compatible with most PC cases. The ARGB lighting on the PWM fan synchronizes with a 5V 3-pin motherboard connection, providing a visually striking effect. Conversely, the Peerless Assassin 120 SE features an anodized brushed black top cover, which gives it a sleek and professional look. The offset asymmetric layout of the Peerless design also enhances compatibility with graphics cards and motherboards, making it a practical choice for various builds.

Noise Levels

Noise levels are crucial for users who prioritize a quiet computing environment. The Assassin X 120R's fan operates quietly, aided by silicone corner pads that mitigate vibration noise. Although exact dB(A) levels are not specified for the Assassin X, its design aims to reduce noise during operation. On the other hand, the Peerless Assassin 120 SE has a specified noise level of 25.6 dB(A) at maximum fan speed, which is relatively quiet for high-performance cooling. Users seeking a balance between performance and noise will find both coolers to be reasonably effective, but the Assassin X may offer a quieter experience depending on the workload.

Compatibility

Both coolers are designed to be compatible with a wide range of CPU sockets. The Assassin X 120R supports AM4/AM5 and Intel LGA1700/1851/1150/1151/1200 sockets, making it versatile for various builds. The Peerless Assassin 120 SE also supports the same socket types, ensuring compatibility with modern CPUs. However, it does require the use of the motherboard's built-in backplate for installation on AM4 and AM5 motherboards, which adds an extra step to its installation. Overall, both coolers stand out for their wide compatibility, but the Assassin X 120R's installation process may be slightly more straightforward.

Installation Process

In terms of installation, the Peerless Assassin 120 SE features an SS2 install system that is designed to ensure better contact with the CPU and maximize heat exchange. While it may provide a more secure fit, this system could complicate the installation process for less experienced users. The Assassin X 120R, while having a simpler installation process, does not compromise on effectiveness, making it a good choice for users who prefer ease of use. The difference in installation complexity may be a deciding factor for those who prioritize straightforward assembly.

Pricing and Value

The pricing difference between the two coolers is significant. The Assassin X 120R costs $22.90, while the Peerless Assassin 120 SE is priced at $32.90. This makes the Assassin X approximately 43% cheaper than its counterpart. Given the similar target audience and functionality, the Assassin X presents a compelling value proposition, especially for budget-conscious builders. However, those willing to invest more may find the additional features of the Peerless Assassin, such as the dual fans and advanced heat pipe technology, justify the higher price.

Which should you buy?

Choosing between the Thermalright Assassin X 120R and the Thermalrlght Peerless Assassin 120 SE ultimately depends on your specific needs and preferences. If you prioritize budget and are looking for effective cooling with a unique aesthetic, the Assassin X 120R is an excellent choice at $22.90. However, if maximum cooling performance and advanced features are your top priorities, the Peerless Assassin 120 SE, priced at $32.90, may be worth the investment. Both coolers deliver solid performance, but your decision should consider factors like installation complexity, noise levels, and aesthetic preferences.