Thermalright Peerless Assassin 120 SE CPU Cooler vs Delta A40 ARGB CPU Cooler
Updated August 2026 — The Thermalright Peerless Assassin 120 SE offers superior cooling performance and lower noise levels, while the Delta A40 ARGB CPU Cooler is a more budget-friendly option with decent airflow. Ultimately, the choice depends on your specific needs and budget.
The Thermalright Peerless Assassin 120 SE offers superior cooling performance and lower noise levels, while the Delta A40 ARGB CPU Cooler is a more budget-friendly option with decent airflow. Ultimately, the choice depends on your specific needs and budget.
Why Thermalright Peerless Assassin 120 SE CPU Cooler is better
Cooling Performance
Higher rated airflow and lower noise levels
Brand Reputation
Established brand with over 20 years of experience
Noise Levels
Quieter operation at ≤25.6 dB(A)
Why Delta A40 ARGB CPU Cooler is better
Price
Significantly lower cost at C$19.29
Airflow
Higher airflow rating of 73 CFM
Design
Modern aesthetics with customizable lighting
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 SE CPU Cooler | Delta A40 ARGB CPU Cooler |
|---|---|---|
| Max RPM | 1550 | 2000 |
| Airflow | 66.17 CFM | 73 CFM |
| Noise Level | ≤25.6 dB(A) | ≤29 dB(A) |
| Power Dissipation | N/A | 220W |
| Socket Compatibility | Intel/AMD | Intel/AMD |
Dimension comparison
Price Comparison
The Thermalright Peerless Assassin 120 SE CPU Cooler is priced at C$48.90, significantly higher than the Delta A40 ARGB CPU Cooler, which costs only C$19.29. This price difference of C$29.61 is notable, especially for budget-conscious consumers. While the Thermalright model offers advanced features and performance, the Delta A40 presents itself as a more affordable option, making it appealing for those who are building a system on a tighter budget.
Design and Aesthetics
In terms of design, the Thermalright Peerless Assassin 120 SE boasts a dual tower heatsink configuration, which enhances its cooling efficiency. It features two high-performance ARGB fans that create colorful lighting effects, contributing to an attractive aesthetic. On the other hand, the Delta A40 ARGB CPU Cooler has a unique design with circular elements and a mirror-like top, appealing to those who appreciate modern aesthetics. Its family fin array design not only enhances the visual appeal but also promotes effective airflow, ensuring that both coolers cater to different tastes in visual design.
Cooling Performance
When it comes to cooling performance, the Thermalright Peerless Assassin 120 SE is equipped with six heat pipes made of pure copper, optimising heat dissipation. It supports a rated air flow of 66.17 CFM at a noise level of ≤25.6 dB(A), making it suitable for high-performance tasks. In contrast, the Delta A40 can handle high loads with a power dissipation capability of up to 220W, making it suitable for gaming or creative tasks. It has an impressive airflow of 73 CFM, although it operates at a slightly higher noise level of ≤29 dB(A). Consequently, while both coolers perform well, the Delta A40 offers slightly better airflow, making it a strong contender for demanding applications.
Fan Technology
The Thermalright Peerless Assassin 120 SE utilises two 120mm ARGB fans that operate at a maximum speed of 1550 RPM. This fan configuration ensures efficient cooling with a rated airflow of 66.17 CFM. In comparison, the Delta A40 features a single 120mm PWM silent fan capable of speeds between 500 to 2000 RPM, allowing for a broader range of performance adjustments depending on the needs of the system. The Delta A40's fan is also designed to minimise noise while optimising airflow, making it a suitable option for users who value quieter operation.
Installation and Compatibility
Both coolers are designed for easy installation and compatibility with a range of CPU sockets. The Thermalright Peerless Assassin 120 SE supports Intel sockets such as LGA1150, 1151, 1155, 1156, 1200, 1700, 1851, and AMD AM4/AM5. However, it requires users to utilize their motherboard’s built-in backplate for AM4 and AM5 installations, which may necessitate extra consideration during setup. Conversely, the Delta A40 is compatible with similar Intel and AMD sockets, making it accessible for most users. Its all-metal mounting hardware enhances the installation process, simplifying setup for both platforms.
Noise Levels
Noise levels are an important consideration for many users, especially those looking for a quiet computing experience. The Thermalright Peerless Assassin 120 SE operates at a maximum noise level of ≤25.6 dB(A), making it a quieter option compared to the Delta A40, which has a maximum noise level of ≤29 dB(A). This difference in noise output could be a decisive factor for those who prioritise silent operation, particularly in environments where noise can be distracting.
Brand Reputation
Thermalright has over 20 years of experience in the cooling market, establishing a reputation for high-performance products. This brand recognition may influence purchasing decisions for those who trust established brands and their proven track records. On the other hand, the Delta A40 is marketed by Ocypus, which may not have the same level of brand recognition. However, the innovative design and performance of the Delta A40 may attract users looking for modern solutions in CPU cooling.
Which should you buy?
The choice between the Thermalright Peerless Assassin 120 SE and the Delta A40 ARGB CPU Cooler ultimately hinges on individual needs and preferences. If you're willing to invest more for advanced cooling performance, lower noise levels, and brand reliability, the Thermalright Peerless Assassin 120 SE is a compelling option. However, if you're on a budget and seek a cooler that offers efficient performance with attractive aesthetics at a significantly lower price, the Delta A40 could be the ideal choice. Assess your specific requirements to determine which cooler aligns best with your build and usage scenario.
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