Thermalright Assassin X 120 SE ARGB CPU Air Cooler vs Thermalright Peerless Assassin 120 CPU Air Cooler
Updated August 2026 — The Thermalright Peerless Assassin 120 offers superior cooling performance and aesthetic features, making it the better choice for high-end users, while the Assassin X 120 SE is a budget-friendly option.
The Thermalright Peerless Assassin 120 offers superior cooling performance and aesthetic features, making it the better choice for high-end users, while the Assassin X 120 SE is a budget-friendly option.
Why Thermalright Assassin X 120 SE ARGB CPU Air Cooler is better
price
Assassin X 120 SE is significantly cheaper at C$24.29
size
Assassin X 120 SE is slightly shorter, potentially fitting in more cases
weight
Assassin X 120 SE is lighter at 0.645kg compared to 1.02kg
Why Thermalright Peerless Assassin 120 CPU Air Cooler is better
TDP
Peerless Assassin 120 has a higher TDP of 245W
heat pipes
Peerless Assassin 120 features six heat pipes for better cooling
ARGB
Peerless Assassin 120 has more advanced ARGB lighting features
Overall score
Specifications
| Spec | Thermalright Assassin X 120 SE ARGB CPU Air Cooler | Thermalright Peerless Assassin 120 CPU Air Cooler |
|---|---|---|
| TDP | 225W | 245W |
| Heat Pipes | 4 | 6 |
| Airflow | 66.17CFM | 66.17CFM |
| Noise Level | ≤25.6dB(A) | ≤25.6dB(A) |
| Socket Support | 115X/1200/1700/AM4 | 1150/1151/1155/1156/1200/1700/2066/2011/AM4/AM5 |
Dimension comparison
Overview of Thermalright CPU Coolers
The Thermalright Assassin X 120 SE ARGB CPU Air Cooler and the Thermalright Peerless Assassin 120 CPU Air Cooler present two distinct options for those seeking efficient CPU cooling solutions. The Assassin X 120 SE is priced at C$24.29, while the Peerless Assassin 120 is significantly higher at C$51.39. Both coolers are designed to cater to the needs of different users, from budget-conscious gamers to enthusiasts seeking optimal performance.
Cooling Performance Comparison
The Thermalright Peerless Assassin 120 stands out with a higher thermal design power (TDP) rating of 245W compared to the Assassin X 120 SE's TDP of 225W. This suggests that the Peerless model can handle more demanding cooling tasks, making it suitable for high-performance CPUs. Furthermore, the Peerless features six 6mm heat pipes, while the Assassin X has four 6mm heat pipes, allowing for better heat dissipation in the Peerless version. Both models are equipped with PWM fans that churn out an airflow of 66.17CFM at a noise level of ≤25.6dB(A), ensuring quiet operation without sacrificing performance.
Build Quality and Design
In terms of build quality, both products utilize aluminum for their heat sink materials. However, the Peerless Assassin 120 employs a double tower design, which enhances its cooling capabilities. The Assassin X 120 SE, although effective, has a single tower configuration that may not provide the same level of efficiency under extreme loads. The Peerless model's dimensions are 125mm in length, 135mm in width, and 157mm in height, while the Assassin X is slightly shorter at 148mm in height but has a similar length and width. This difference in height may affect compatibility with certain cases, a crucial consideration for builders.
Installation and Compatibility
Both the Thermalright Assassin X 120 SE and the Peerless Assassin 120 are designed for easy installation, featuring metal fasteners compatible with both Intel and AMD platforms. The Assassin X supports Intel sockets 115X, 1200, 1700, and AMD AM4, while the Peerless expands compatibility to include a wider range of Intel sockets, including 2066 and 2011, as well as support for AMD’s AM4 and AM5. The ease of installation for both coolers, aided by the provided mounting plates, ensures that users can set up their systems without undue hassle.
Noise Levels
Both coolers boast a noise level of ≤25.6dB(A), making them suitable for quiet computing environments. The PWM fans in both models, with speeds of approximately 1500-1550rpm, operate efficiently without generating excessive noise. This performance characteristic is particularly appealing for users who prioritise a quiet computing experience while still requiring effective cooling solutions.
Aesthetic Appeal
When it comes to aesthetics, the Thermalright Peerless Assassin 120 takes the lead with its ARGB lighting features. The high-brightness LED atomizing fan blades not only enhance the visual appeal but can also be synchronized with compatible motherboards for a cohesive build aesthetic. The Assassin X 120 SE also features ARGB capabilities, but its design is less elaborate, focusing more on functional performance rather than striking visual effects. For users who appreciate RGB lighting, the Peerless model offers a more vibrant and customizable option.
Price Considerations
Price is a significant factor when choosing between the two coolers. The Assassin X 120 SE's price of C$24.29 makes it an attractive choice for budget-conscious users. In contrast, the Peerless Assassin 120, at C$51.39, is more of an investment, particularly for those seeking top-tier cooling performance. The price difference reflects the additional features and enhanced cooling capabilities of the Peerless model. Therefore, potential buyers should consider their cooling needs and budget constraints when making a decision.
Which should you buy?
Choosing between the Thermalright Assassin X 120 SE ARGB and the Peerless Assassin 120 ultimately depends on your specific requirements. If you are looking for an affordable, efficient cooler for standard computing tasks, the Assassin X 120 SE is a solid choice. However, if you require superior cooling performance, especially for high-end CPUs, and appreciate aesthetic features like ARGB lighting, the Peerless Assassin 120 justifies its higher price with enhanced cooling capabilities and a more striking design. Evaluate your cooling needs, aesthetic preferences, and budget to make the best choice for your build.
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