ARCTIC P12 Pro A-RGB - Powerful Premium Fan, vs Thermalright Peerless Assassin 120 SE CPU Cooler,
Updated August 2026 — ARCTIC P12 Pro A-RGB - Powerful Premium Fan, wins on noise level and aesthetics, Thermalright Peerless Assassin 120 SE CPU Cooler, wins on compatibility and warranty.
The Thermalright Peerless Assassin 120 SE offers superior cooling performance and build quality, making it the better choice for CPU cooling. However, the ARCTIC P12 Pro is a more budget-friendly option for general airflow.
Why ARCTIC P12 Pro A-RGB - Powerful Premium Fan, is better
Price
ARCTIC P12 Pro is significantly cheaper.
Noise
ARCTIC P12 Pro operates quieter.
Aesthetics
ARCTIC P12 Pro has RGB lighting.
Why Thermalright Peerless Assassin 120 SE CPU Cooler, is better
Cooling
Thermalright has advanced cooling technology.
Build Quality
Thermalright uses premium materials.
Performance
Thermalright is optimized for CPU cooling.
Overall score
Specifications
| Spec | ARCTIC P12 Pro A-RGB - Powerful Premium Fan, | Thermalright Peerless Assassin 120 SE CPU Cooler, |
|---|---|---|
| RPM | 600-3000 | 1550 |
| Heat Pipes | 0 | 6 |
| PWM Control | Yes | Yes |
| RGB Lighting | Yes | No |
| Compatibility | General | Intel/AMD |
Dimension comparison
Overview of the Products
In this comparison, we will look at the ARCTIC P12 Pro A-RGB fan and the Thermalright Peerless Assassin 120 SE CPU cooler. The ARCTIC P12 Pro is priced at $12.49, while the Thermalright Peerless Assassin is significantly more expensive at $49.99. This price difference of approximately 300% raises questions about their respective capabilities and functionalities.
The ARCTIC P12 Pro A-RGB is designed as a powerful premium fan with a focus on high static pressure and PWM control, making it suitable for various cooling applications. On the other hand, the Thermalright Peerless Assassin 120 SE is a comprehensive CPU cooler equipped with dual fans and advanced heat pipe technology, tailored for more intensive cooling needs.
Cooling Performance
When it comes to cooling performance, the Thermalright Peerless Assassin 120 SE clearly outshines the ARCTIC P12 Pro. The Thermalright cooler features six heat pipes and dual 120mm PWM fans that can manage speeds of 1550 RPM, ensuring efficient heat dissipation. This design is specifically engineered for both Intel and AMD platforms, providing robust cooling performance for high-demand CPUs.
In contrast, the ARCTIC P12 Pro fan operates at a maximum speed of 3000 RPM and is focused on delivering high static pressure. While the P12 Pro excels in airflow, particularly in restricted spaces like dense radiators, it does not offer the same level of dedicated cooling for CPU components as the Thermalright, which is optimized for that specific application.
Build Quality and Design
Build quality is another area where the Thermalright Peerless Assassin 120 SE stands out. It utilizes a combination of aluminum for the heat sink and pure copper for the heat pipes, ensuring effective thermal conductivity. This cooler is also designed with AGHP technology, which helps mitigate the inverse gravity effect, enhancing its reliability in various orientations.
The ARCTIC P12 Pro, while built for smooth and quiet operation with its fluid dynamic bearing, focuses more on fan performance than on structural complexity. Its design is straightforward, intended for versatility across different setups. However, it lacks the advanced engineering that the Thermalright cooler provides, which is crucial for maintaining performance under load.
Noise Levels
Noise levels can significantly influence user experience, especially in custom PC builds. The ARCTIC P12 Pro is designed with minimal vibrations and operates quietly, making it an excellent choice for users who prioritize a silent environment. Its fluid dynamic bearing technology is specifically engineered to minimize noise during operation.
On the other hand, the Thermalright Peerless Assassin 120 SE has a noise level of up to 25.6 dB(A) at full fan speed. While this is reasonable for a CPU cooler, it may not be as quiet as the ARCTIC P12 Pro, especially if used in a low-noise build. Users looking for a balance between performance and silence may lean towards the ARCTIC fan.
Installation and Compatibility
The Thermalright Peerless Assassin 120 SE offers a user-friendly installation process, featuring metal fasteners compatible with both Intel and AMD platforms. It comes with the necessary mounting plates and parts, ensuring a straightforward setup for a variety of CPU socket types.
Conversely, the ARCTIC P12 Pro is a fan that can be easily integrated into multiple cooling systems, thanks to its 4-pin PWM connection. However, it doesn't serve as a standalone CPU cooler, which limits its compatibility in that specific application. Users seeking a comprehensive cooling solution for their CPUs may find the Thermalright cooler to be a more efficient choice.
Aesthetics
In terms of aesthetics, the ARCTIC P12 Pro A-RGB fan shines with its vibrant 5V digital RGB lighting. This feature allows for customizable lighting effects, adding a flair to any build. The sleek black design enhances its visual appeal, making it an attractive option for gamers and PC enthusiasts who want to showcase their setups.
On the other hand, the Thermalright Peerless Assassin 120 SE has a more utilitarian design, focusing on functionality rather than visual impact. While it performs exceptionally well, it lacks the aesthetic enhancements found in the ARCTIC fan. Users who value RGB lighting may prefer the ARCTIC fan over the more subdued Thermalright cooler.
Price Comparison
The price difference between the two products is substantial, with the ARCTIC P12 Pro retailing for $12.49 and the Thermalright Peerless Assassin 120 SE priced at $49.99. This places the Thermalright cooler at about 300% the cost of the ARCTIC fan. While the ARCTIC fan offers a budget-friendly option for users seeking reliable cooling, the Thermalright cooler provides a higher level of performance and build quality, justifying its higher price point for serious gamers and PC builders.
Which should you buy?
Ultimately, the choice between the ARCTIC P12 Pro A-RGB fan and the Thermalright Peerless Assassin 120 SE CPU cooler depends on your specific needs. If you're looking for a high-performance CPU cooler with advanced technology and efficient heat dissipation, the Thermalright Peerless Assassin is a worthy investment, albeit at a higher cost. However, for users seeking a versatile, budget-friendly cooling solution primarily for case airflow or less demanding applications, the ARCTIC P12 Pro is an excellent option.

