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Thermalright Assassin King 120 SE White ARGB CPU vs Thermalright Peerless Assassin 120 SE CPU Cooler,

Updated August 2026 — Thermalright Peerless Assassin 120 SE CPU Cooler, leads on cooling perf and design.

The Thermalright Peerless Assassin 120 SE offers superior cooling performance and features, making it the better choice for high-demand users. However, the Assassin King 120 SE is a more budget-friendly option.

Why Thermalright Assassin King 120 SE White ARGB CPU is better

Price

Assassin King is significantly cheaper at $19.82.

Size

Assassin King has a more compact design.

Aesthetics

Assassin King features colorful ARGB lighting.

Why Thermalright Peerless Assassin 120 SE CPU Cooler, is better

Cooling

Peerless Assassin has dual fans for better cooling.

Heat Pipes

Peerless Assassin has six heat pipes compared to five.

Performance

Peerless Assassin is better suited for overclocking.

Overall score

Thermalright Assassin King 120 SE White ARGB CPU
70
Thermalright Peerless Assassin 120 SE CPU Cooler,
85

Specifications

SpecThermalright Assassin King 120 SE White ARGB CPUThermalright Peerless Assassin 120 SE CPU Cooler,
Heat Pipes56
Fan Count12
Air Flow66.17 CFM66.17 CFM
Noise Level25.6 dB(A)25.6 dB(A)
Socket SupportIntel/AMDIntel/AMD

Dimension comparison

Thermalright Assassin King 120 SE White ARGB CPUThermalright Peerless Assassin 120 SE CPU Cooler,

Overview of the Thermalright Assassin King 120 SE and Peerless Assassin 120 SE

When comparing the Thermalright Assassin King 120 SE and the Peerless Assassin 120 SE, the first point of distinction is their pricing. The Assassin King is priced at $19.82, making it about 60% cheaper than the Peerless Assassin, which retails for $49.99. While both coolers are designed for efficient CPU cooling, the price disparity reflects differences in their features and capabilities.

Design and Build Quality

The Thermalright Assassin King 120 SE features a compact design with dimensions of 120(L)x73(W)x148(H)mm, which is suitable for medium-sized computer cases. In contrast, the Peerless Assassin 120 SE is slightly larger, measuring 125(L)x135(W)x155(H)mm. Both coolers are constructed from aluminum and are equipped with metal fasteners to ensure secure installation on both Intel and AMD platforms. However, the Peerless Assassin's larger size may offer improved cooling performance, especially for high-demand CPUs.

Cooling Performance

Cooling performance is a critical factor in choosing a CPU cooler. The Assassin King utilizes five heat pipes and features a single PWM fan that operates at 1550 RPM, providing an air flow of 66.17 CFM with a noise level of 25.6 dB(A). On the other hand, the Peerless Assassin employs six heat pipes and includes two PWM fans, also operating at 1550 RPM. This dual-fan setup potentially enhances cooling efficiency, especially under heavy load, making it more suitable for overclocking or high-performance builds.

Aesthetic Features

In terms of aesthetics, the Assassin King 120 SE boasts colorful ARGB lighting effects, adding a visual flair to your setup. This feature is particularly appealing to gamers and PC enthusiasts who prioritize aesthetics in their builds. Meanwhile, the Peerless Assassin does not explicitly mention ARGB features, focusing more on performance attributes. If visual appeal is a major factor for you, the Assassin King might be the preferable choice.

Noise Levels

Both coolers claim a similar noise level of 25.6 dB(A), which suggests they offer quiet operation even under load. However, the Peerless Assassin's dual-fan design may distribute the workload more evenly, potentially leading to quieter performance compared to a single fan system. While both models are designed to maintain low noise levels, users seeking ultra-quiet operation may want to consider the potential benefits of the dual-fan setup.

Compatibility

Both coolers support a wide range of CPU sockets, including Intel's LGA 1700 and AMD's AM4/AM5. The Assassin King comes with the necessary mounting hardware for various socket types, ensuring compatibility across different platforms. The Peerless Assassin also provides the required fasteners, though it notes that installation on AMD platforms requires the motherboard's original built-in backplane, which may complicate installation for some users. This factor may influence your decision depending on your setup.

Brand Reputation

Thermalright, the brand behind both coolers, has over 20 years of experience in developing computer accessories. It maintains a solid reputation in the market, particularly among gamers and PC builders. Both products reflect the brand's commitment to quality and performance. However, the Peerless Assassin, with its more advanced features and higher price point, may be perceived as a premium choice, catering to enthusiasts willing to invest more for better cooling performance.

Which should you buy?

Choosing between the Thermalright Assassin King 120 SE and the Peerless Assassin 120 SE ultimately depends on your specific needs and budget. If you are looking for a cost-effective solution that still delivers solid performance for standard gaming or productivity tasks, the Assassin King at $19.82 is an excellent choice. However, if you require superior cooling capabilities for overclocking or high-performance CPUs and are willing to pay the premium price of $49.99 for the Peerless Assassin, its dual-fan design and enhanced features make it worth considering. Assess your performance expectations and budget to make the best decision for your build.