Thermalright Peerless Assassin 120 SE CPU Air Cooler vs ARCTIC P12
Updated August 2026 — The Thermalright Peerless Assassin 120 SE outperforms the ARCTIC P12 in cooling capacity and features, making it the better choice for high-performance systems.
The Thermalright Peerless Assassin 120 SE outperforms the ARCTIC P12 in cooling capacity and features, making it the better choice for high-performance systems.
Why Thermalright Peerless Assassin 120 SE CPU Air Cooler is better
Cooling Capacity
Higher TDP rating of 120 to 265W
Dual Fans
Includes two PWM fans for better airflow
Material Quality
Uses copper for better heat dissipation
Why ARCTIC P12 is better
Price
Lower price at £21.58
Noise Level
Similar noise level at 0.3 Sone
Service Life
Fluid Dynamic Bearing for longer lifespan
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 SE CPU Air Cooler | ARCTIC P12 |
|---|---|---|
| TDP Rating | 120-265W | N/A |
| Noise Level | 25.6 dB(A) | 0.3 Sone |
| Fan Type | PWM | 3-pin |
| Socket Support | Intel/AMD | N/A |
| Material | Copper/Aluminum | Plastic |
Dimension comparison
Brand Overview
The Thermalright Peerless Assassin 120 SE is a product from a Taiwanese brand with over 20 years of experience in computer accessory development. In contrast, the ARCTIC P12 is produced by ARCTIC, a brand known for its innovation in cooling solutions. The reputation of Thermalright in the gaming community and its focus on high-performance cooling systems positions it as a strong contender in the market. Meanwhile, ARCTIC has gained recognition for its efficiency and design, making the P12 an appealing option for those looking for reliable fans.
Cooling Performance
The Thermalright Peerless Assassin 120 SE boasts an impressive cooling performance, with a TDP rating of 120 to 265W. It utilises six 6mm heat pipes and features two PWM fans that can achieve a maximum airflow of 66.17 CFM, operating at a speed of 1550 RPM. This design allows it to effectively cool high-performance CPUs. Conversely, the ARCTIC P12 has a slightly lower airflow of 56.3 CFM at a maximum speed of 1800 RPM. While both products excel in their cooling capabilities, the Peerless Assassin has a higher maximum cooling capacity, making it particularly suited for overclocked systems.
Noise Levels
When it comes to noise levels, the Thermalright Peerless Assassin 120 SE operates at a maximum of 25.6 dB(A), which is relatively quiet for a CPU cooler. The dual fans are designed for ultra-silent airflow, ensuring that system noise remains minimal even under load. The ARCTIC P12, on the other hand, produces a noise level of 0.3 Sone, which is equivalent to approximately 25 dB(A) as well. Both fans are designed with noise reduction in mind, but the Peerless Assassin may have a slight edge in overall quiet operation due to its dual-fan configuration.
Build Quality and Materials
The Thermalright Peerless Assassin 120 SE is constructed from a combination of copper and aluminium, ensuring efficient heat dissipation and durability. Its robust design includes metal fasteners for both Intel and AMD platforms, emphasising compatibility and ease of installation. The ARCTIC P12 features a Fluid Dynamic Bearing that enhances its longevity and efficiency, with a design that minimises friction and noise. While both products are built with quality materials, the Peerless Assassin's use of copper for heat transfer may make it more effective in thermal management.
Installation and Compatibility
Installation is straightforward for both coolers, but the Thermalright Peerless Assassin 120 SE provides comprehensive support for various CPU sockets, including Intel's 115X, 1200, and 1700, as well as AMD's AM4, with all necessary mounting hardware included. This versatility makes it a more adaptable choice for users with different system configurations. The ARCTIC P12, while efficient, is primarily a fan and does not offer the same level of compatibility or installation support for CPU cooling. Therefore, if you're looking for a complete cooling solution, the Peerless Assassin is the more suitable option.
Price Comparison
In terms of pricing, the Thermalright Peerless Assassin 120 SE is currently available for £29.99, while the ARCTIC P12 is priced at £21.58. The price difference of £8.41 reflects the additional features and performance capabilities of the Peerless Assassin, which offers a complete cooling solution with dual fans and higher cooling capacity. However, if budget is a primary concern and you're looking for a standalone fan, the ARCTIC P12 offers excellent value for money.
Target Audience
The Thermalright Peerless Assassin 120 SE is designed for gamers and PC enthusiasts who demand high performance and efficient cooling for their systems, especially for those who overclock their CPUs. Its superior cooling capabilities and compatibility with various CPU sockets make it ideal for high-end builds. The ARCTIC P12, on the other hand, targets users seeking a reliable, efficient fan for general use or as part of a cooling solution in less demanding environments. It is particularly suited for those who want to enhance airflow in their cases without needing extensive cooling hardware.
Which should you buy?
Choosing between the Thermalright Peerless Assassin 120 SE and the ARCTIC P12 ultimately depends on your specific cooling needs and budget. If you require robust cooling performance for a high-end CPU, the Peerless Assassin is the clear winner, with its superior TDP rating and dual-fan setup. However, if you are looking for an efficient, quieter fan at a lower price point for a less demanding application, the ARCTIC P12 is an excellent choice. Consider your cooling requirements and budget to make the best decision for your setup.
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