Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler vs Delta A40 ARGB CPU Cooler
Updated August 2026 — The Thermalright Peerless Assassin 120 SE offers superior cooling performance and quieter operation, making it the better choice for high-performance builds. The Delta A40 is a budget-friendly option with decent performance.
The Thermalright Peerless Assassin 120 SE offers superior cooling performance and quieter operation, making it the better choice for high-performance builds. The Delta A40 is a budget-friendly option with decent performance.
Why Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler is better
higher TDP
Thermalright supports up to 245W TDP compared to Delta's 220W
quieter operation
Thermalright operates at a maximum of 25.6 dB(A) vs Delta's 29 dB(A)
dual fans
Thermalright has two PWM fans for better airflow and cooling
Why Delta A40 ARGB CPU Cooler is better
lower price
Delta A40 is priced at C$19.29 compared to Thermalright's C$46.90
higher airflow
Delta A40 has a maximum airflow of 73 CFM vs Thermalright's 66.17 CFM
aesthetic design
Delta A40 features a unique family fin array design
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler | Delta A40 ARGB CPU Cooler |
|---|---|---|
| TDP | 245W | 220W |
| Noise Level | 25.6 dB(A) | 29 dB(A) |
| Fan Speed | 1500 RPM | 500-2000 RPM |
| ARGB Support | Yes | Yes |
| Socket Compatibility | Intel 115X/1200/1700, AMD AM4 | Intel 115X/1200/1700, AMD AM4/AM |
Dimension comparison
Introduction
When selecting a CPU cooler, both performance and aesthetics play pivotal roles. In this comparison, we will evaluate the Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler against the Delta A40 ARGB CPU Cooler. The Thermalright model is priced at C$46.90, while the Delta A40 comes in at a significantly lower price of C$19.29. This price difference sets the stage for an interesting examination of their features and capabilities.
Design and Aesthetics
The design of the Thermalright Peerless Assassin 120 SE is robust and functional, featuring a double tower cooling structure that enhances heat dissipation. It boasts a sleek ARGB lighting system that adds a vibrant touch to any build. In contrast, the Delta A40 also features ARGB lighting but incorporates a unique family fin array design that reduces wind resistance and enhances overall aesthetics. With its circular elements and mirror-like finish, the Delta A40 offers a visually appealing package aimed at gamers and creative professionals alike.
Cooling Performance
The Thermalright Peerless Assassin 120 SE is designed to handle a thermal design power (TDP) of up to 245W, making it suitable for high-performance CPUs. It utilises six copper heat pipes and two PWM fans that deliver a maximum airflow of 66.17 CFM at a noise level of 25.6 dB(A). On the other hand, the Delta A40 can manage up to 220W of power dissipation. Its 120mm PWM fan boasts an airflow of 73 CFM, but with a slightly higher noise level of up to 29 dB(A). While both coolers provide efficient cooling, the Thermalright model edges out in TDP handling, making it more suitable for overclocking enthusiasts.
Fan Technology
The Thermalright Peerless Assassin 120 SE is equipped with two PWM fans that operate at speeds of 1500 RPM, optimising airflow while maintaining a quieter operation. Its fans are designed for ultra-silent performance, ideal for builds prioritising low noise levels. Conversely, the Delta A40 features a single high-performance PWM fan that can spin between 500 to 2000 RPM. While this fan provides flexibility in cooling performance, it can be noisier at higher speeds. Thus, the Thermalright’s dual-fan setup may offer a more balanced approach to cooling while ensuring lower noise levels.
Compatibility
In terms of compatibility, both coolers support a wide range of CPU sockets. The Thermalright Peerless Assassin 120 SE is compatible with Intel’s 115X, 1200, 1700, and AMD’s AM4 sockets, making it versatile for various builds. The Delta A40 matches this compatibility, supporting the same Intel sockets alongside AMD’s AM4 and AM sockets. Their similarities in compatibility make either cooler a feasible choice for a broad spectrum of systems, ensuring ease of installation regardless of the platform.
Installation Process
The installation of the Thermalright Peerless Assassin 120 SE is facilitated by its included metal fasteners that are tailored for both Intel and AMD platforms. This ease of installation is a significant advantage for users who may not be comfortable with complex assembly processes. Similarly, the Delta A40 comes equipped with all-metal mounting hardware, ensuring a straightforward setup. Both products prioritise user-friendliness in their design, making them suitable for builders of all experience levels.
Noise Levels
Noise levels are an important consideration for many users, especially for those building quieter systems. The Thermalright Peerless Assassin 120 SE operates at a maximum noise level of 25.6 dB(A), which is relatively quiet and ideal for low-noise builds. The Delta A40, however, operates at a higher maximum noise level of 29 dB(A) due to its fan speed capability reaching 2000 RPM. While both coolers are designed with noise reduction in mind, the Thermalright cooler offers a more silent operation, making it preferable for users who value a quieter environment.
Price Point
Price is a significant consideration when choosing between these two coolers. The Thermalright Peerless Assassin 120 SE is priced at C$46.90, reflecting its advanced features and higher TDP handling capability. In contrast, the Delta A40 is much more budget-friendly at C$19.29. While the lower price of the Delta A40 may appeal to cost-conscious consumers, the Thermalright model offers greater performance potential for users willing to invest more.
Which should you buy?
Choosing between the Thermalright Peerless Assassin 120 SE and the Delta A40 ARGB CPU Cooler ultimately depends on your specific needs and budget. If you require superior cooling performance and quieter operation, the Thermalright Peerless Assassin 120 SE is the better option, particularly for high-performance builds needing a cooler capable of handling up to 245W. However, if you are on a tight budget and seeking a visually appealing cooler with decent performance, the Delta A40 offers great value at C$19.29. Ultimately, consider your system’s requirements and your budget to make the best choice for your needs.
versusfinder.com is a participant in the Amazon.ca Associates Program. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

