Thermalright Peerless Assassin 120 SE CPU Cooler vs Thermalright Assassin X 120R SE V2 CPU Air Cooler
Updated August 2026 — The Thermalright Peerless Assassin 120 SE offers superior cooling performance and advanced features, making it the better choice for high-performance builds. The Assassin X is a budget-friendly option that still delivers effective cooling.
The Thermalright Peerless Assassin 120 SE offers superior cooling performance and advanced features, making it the better choice for high-performance builds. The Assassin X is a budget-friendly option that still delivers effective cooling.
Why Thermalright Peerless Assassin 120 SE CPU Cooler is better
Cooling Efficiency
Dual tower design with six heat pipes for better heat exchange.
Aesthetics
Features colorful ARGB lighting for enhanced visual appeal.
Performance
Higher overall cooling performance due to advanced design.
Why Thermalright Assassin X 120R SE V2 CPU Air Cooler is better
Price
Significantly lower price point at C$23.59.
Installation
Includes mounting plates for easier installation.
Size
Slightly shorter height, making it compatible with more cases.
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 SE CPU Cooler | Thermalright Assassin X 120R SE V2 CPU Air Cooler |
|---|---|---|
| Price | C$48.90 | C$23.59 |
| Airflow | 66.17 CFM | 66.17 CFM |
| Noise Level | 25.6 dB(A) | 25.6 dB(A) |
| Fan Speed | 1550 RPM | 1550 RPM |
| Socket Support | LGA1150/1151/1155/1156/1200/1700, AM4/AM5 | LGA1150/1151/1155/1156/1200/1700, AM4/AM5 |
Dimension comparison
Brand Overview
Both the Thermalright Peerless Assassin 120 SE CPU Cooler and the Thermalright Assassin X 120R SE V2 CPU Air Cooler are products from Thermalright, a brand with over 20 years of experience in computer cooling solutions. The Peerless Assassin is a more advanced model, while the Assassin X is designed for those seeking effective cooling at a lower price point. The brand has built a reputation for high-performance heatsinks and accessories, making both products worthy contenders in the CPU cooler market.
Price Comparison
The Thermalright Peerless Assassin is priced at C$48.90, while the Thermalright Assassin X is significantly more affordable at C$23.59. This substantial price difference of C$25.31 might make the Assassin X more appealing for budget-conscious consumers. However, the higher price of the Peerless Assassin comes with enhanced features and performance capabilities, suggesting that the investment may be worth it for those who require superior cooling efficiency.
Performance and Cooling Efficiency
In terms of cooling performance, the Peerless Assassin features a dual tower heatsink configuration with six 6mm heat pipes, promoting rapid heat exchange and efficient cooling. It is equipped with two high-performance ARGB fans that operate at a speed of 1550 RPM, producing an airflow of 66.17 CFM. In comparison, the Assassin X also boasts a single fan operating at the same RPM and airflow rating but utilises a simpler design with four heat pipes. This indicates that while both coolers perform similarly in airflow, the Peerless Assassin is likely to provide better overall cooling efficiency due to its advanced design.
Noise Levels
Both coolers maintain a low noise level of 25.6 dB(A), making them suitable for quiet computing environments. This means that users can expect similar acoustic performance from both models. However, the Peerless Assassin, with its dual fans, may distribute noise more evenly, potentially making it quieter under load compared to the single fan of the Assassin X. Thus, while both options are relatively quiet, the Peerless Assassin might have a slight edge in providing a more serene computing experience.
Design and Aesthetics
The Thermalright Peerless Assassin features a sleek design with colourful ARGB lighting, which can enhance the visual appeal of a gaming rig. It also incorporates a cutout on the fin for improved RAM compatibility, ensuring that taller RAM modules can fit without obstruction. The Assassin X, while also aesthetically pleasing, has a more utilitarian design and self-luminous fan power supply that lights up upon connection. This difference in design philosophy may appeal to different user preferences, with the Peerless model being more visually striking, while the Assassin X offers a straightforward, functional look.
Compatibility
Both coolers support a wide range of CPU sockets, including Intel's LGA1150/1151/1155/1156/1200/1700 and AMD's AM4/AM5. The Peerless Assassin requires the original motherboard's built-in backplate for installation on AM4 and AM5 sockets, which is not included, whereas the Assassin X provides corresponding mounting plates for various CPU socket platforms. This could make the Assassin X easier to install for users with different setups, although both products maintain a strong compatibility profile.
Installation Process
The installation process for both coolers is designed to be user-friendly, with clear instructions provided. The Peerless Assassin features an SS2 install system and a metal pressure plate on the heatsink, promoting better contact with the CPU. The Assassin X also includes installation video guidance, aiming to simplify the process. While both coolers offer straightforward installation, the Peerless Assassin may require more consideration regarding the backplate compatibility, whereas the Assassin X is more adaptable to various setups.
Which should you buy?
When deciding between the Thermalright Peerless Assassin 120 SE and the Thermalright Assassin X 120R SE V2 CPU coolers, the choice ultimately depends on your specific needs and budget. The Peerless Assassin offers superior cooling performance, advanced design features, and aesthetic appeal, making it a great option for high-performance builds. However, if you are looking for a budget-friendly option that still delivers effective cooling, the Assassin X is an excellent choice. It provides good performance at a lower price point, making it suitable for casual users or those building a mid-range system.
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