Thermalright Peerless Assassin 120 CPU Air Cooler vs Thermalright Assassin King 120 SE ARGB CPU Air Cooler
Updated August 2026 — The Thermalright Peerless Assassin 120 offers superior cooling performance and broader compatibility, making it the better choice for high-performance systems. However, the Assassin King 120 SE ARGB provides excellent value at a lower price.
The Thermalright Peerless Assassin 120 offers superior cooling performance and broader compatibility, making it the better choice for high-performance systems. However, the Assassin King 120 SE ARGB provides excellent value at a lower price.
Why Thermalright Peerless Assassin 120 CPU Air Cooler is better
Cooling Performance
Higher TDP rating of 245W
Compatibility
Supports a wider range of Intel sockets
Build Quality
Constructed with six pure copper heat pipes
Why Thermalright Assassin King 120 SE ARGB CPU Air Cooler is better
Price
More affordable at C$24.59
Compact Size
Smaller dimensions for easier fitting
Noise Level
Same low noise level with efficient cooling
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 CPU Air Cooler | Thermalright Assassin King 120 SE ARGB CPU Air Cooler |
|---|---|---|
| TDP Rating | 245W | 125-235W |
| Socket Support | Wide range | Limited |
| Fan Speed | 1500 RPM | 1550 RPM |
| Noise Level | 25.6 dB(A) | 25.6 dB(A) |
| Heat Pipes | 6 | 5 |
Dimension comparison
Price Comparison
When comparing the prices of the Thermalright Peerless Assassin 120 and the Thermalright Assassin King 120 SE ARGB, there is a significant difference. The Peerless Assassin 120 is priced at C$51.39, while the Assassin King 120 SE ARGB is considerably more affordable at C$24.59. This price difference of C$26.80 may influence a buyer's decision, especially for those on a budget or looking for effective cooling solutions without overspending. The lower price of the Assassin King does not necessarily indicate lesser quality, making it an attractive option for users seeking value.
Cooling Performance
In terms of cooling performance, the Thermalright Peerless Assassin 120 takes the lead with a thermal design power (TDP) rating of 245W. This robust performance is supported by its dual tower design and the inclusion of six heat pipes, which enhances its heat dissipation capabilities. On the other hand, the Assassin King 120 SE ARGB has a TDP that ranges from 125W to 235W. While it is slightly lower than that of the Peerless model, it still offers a competent cooling solution for medium-range CPUs. The superior cooling potential of the Peerless Assassin makes it ideal for high-performance systems.
Design and Aesthetics
The design of both coolers showcases Thermalright's commitment to aesthetics and functionality. The Peerless Assassin 120 features a sleek white finish and RGB lighting effects, which contribute to a modern look, while its dimensions are 125mm x 135mm x 157mm. The Assassin King 120 SE ARGB, on the other hand, is slightly more compact with dimensions of 120mm x 73mm x 148mm, making it suitable for smaller cases. Both coolers support ARGB lighting, allowing for synchronisation with motherboard controls. However, the more extensive surface area and taller design of the Peerless Assassin may offer better visual impact in larger builds.
Noise Levels
Both the Thermalright Peerless Assassin 120 and the Assassin King 120 SE ARGB operate at a maximum noise level of 25.6dB(A), which is commendable for CPU coolers in their class. This means that neither of these coolers will produce significant noise during operation, making them suitable for quiet computing environments. The inclusion of PWM fans in both models ensures efficient cooling while maintaining low noise levels, providing users with a balance of performance and tranquility.
Compatibility
Compatibility is a crucial aspect when choosing a CPU cooler. The Peerless Assassin 120 is compatible with a wide range of Intel sockets, including 1150 to 2066, and also supports AMD AM4 and AM5 sockets. This extensive compatibility makes it a versatile choice for various builds. The Assassin King 120 SE ARGB, while slightly less versatile, still supports Intel 115X and 1200 series sockets along with AMD AM4 and AM5. For users with specific socket requirements, the Peerless Assassin 120 offers broader options, making it a more flexible choice for diverse setups.
Installation Ease
When it comes to installation, both coolers are designed with user-friendliness in mind. The Peerless Assassin 120 features an offset asymmetric layout, allowing for easy installation even in tight spaces while leaving room for memory modules. Its dual tower design, coupled with metal fasteners for both Intel and AMD systems, ensures secure and straightforward mounting. The Assassin King 120 SE ARGB also comes equipped with metal fasteners and is designed for easy installation. However, its slightly smaller dimensions might make it easier to fit in compact cases, appealing to users with space constraints.
Longevity and Build Quality
The build quality of both coolers is impressive, but there are notable differences in durability. The Peerless Assassin 120 is constructed with six pure copper heat pipes, promising efficient heat transfer and longevity. Meanwhile, the Assassin King 120 SE ARGB boasts S-FDB bearings that provide an industrial service life of up to 20,000 hours, which is beneficial for long-term use. While both products are built to last, the Peerless Assassin’s superior heat pipe configuration may make it a better choice for those seeking longevity in high-performance scenarios.
Which should you buy?
Ultimately, the decision between the Thermalright Peerless Assassin 120 and the Assassin King 120 SE ARGB boils down to your specific needs and budget. If you require superior cooling capabilities and broader compatibility for high-performance CPUs, the Peerless Assassin 120 is worth the higher investment at C$51.39. However, if you are looking for an effective cooling solution at a lower price point, the Assassin King 120 SE ARGB at C$24.59 offers excellent value without sacrificing essential features. Both coolers have their strengths, making them suitable for different types of users and builds.
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