ARCTIC P12 Pro Reverse – 3 Pack – vs Thermalright Peerless Assassin 120 SE CPU Cooler,
Updated August 2026 — ARCTIC P12 Pro Reverse – 3 Pack – wins on airflow and design, Thermalright Peerless Assassin 120 SE CPU Cooler, wins on compatibility.
The ARCTIC P12 Pro Reverse offers excellent airflow at a budget-friendly price, while the Thermalright Peerless Assassin 120 SE excels in CPU cooling performance. Choose based on your specific needs.
Why ARCTIC P12 Pro Reverse – 3 Pack – is better
Price
ARCTIC fan is significantly cheaper
Airflow
Higher RPM range for better airflow
Aesthetics
Reversed airflow design is visually appealing
Why Thermalright Peerless Assassin 120 SE CPU Cooler, is better
Cooling
More effective for CPU cooling
Heat Pipes
Six heat pipes enhance cooling efficiency
Compatibility
Supports multiple CPU sockets
Overall score
Specifications
| Spec | ARCTIC P12 Pro Reverse – 3 Pack – | Thermalright Peerless Assassin 120 SE CPU Cooler, |
|---|---|---|
| Price | $18.49 | $49.99 |
| Static Pressure | High | Moderate |
| Noise Level | Low | 25.6 dB(A) |
| PWM Control | Yes | Yes |
| Heat Pipes | 0 | 6 |
Dimension comparison
Overview of the Products
The ARCTIC P12 Pro Reverse and the Thermalright Peerless Assassin 120 SE CPU Cooler are both designed to improve cooling efficiency in PC builds, but they serve different purposes. The ARCTIC P12 Pro Reverse is a fan that focuses on airflow dynamics, while the Thermalright Peerless Assassin 120 SE is a comprehensive CPU cooler equipped with multiple cooling features. The ARCTIC fan costs $18.49 for a pack of three, making it about 63% cheaper than the Thermalright cooler, which is priced at $49.99.
Design and Aesthetics
The ARCTIC P12 Pro Reverse features a unique reversed airflow design that draws air in from the back, making it ideal for glass-fronted cases where aesthetics matter. In contrast, the Thermalright Peerless Assassin 120 SE has a more traditional dual-tower design that may not be as visually striking but aims for high performance with its six heat pipes. While both products cater to different design philosophies, the ARCTIC fan stands out for users prioritizing visual appeal alongside functionality.
Cooling Performance
In terms of cooling performance, the ARCTIC P12 Pro Reverse operates within a wide RPM range of 500 to 3000, allowing it to adapt to various cooling needs effectively. Its high static pressure is particularly beneficial for applications requiring airflow through dense radiators or mesh panels. On the other hand, the Thermalright Peerless Assassin 120 SE is designed with six heat pipes that enhance its cooling capability. The dual 120mm PWM fans reach a maximum speed of 1550 RPM, which is lower than the ARCTIC fan but is optimized for CPU cooling performance.
Noise Levels
Noise levels are a critical consideration for many PC builders. The ARCTIC P12 Pro Reverse is designed for quiet operation thanks to its smooth-running fluid dynamic bearing, minimizing noise during use. While specific decibel ratings are not provided, the focus on minimal vibrations indicates a quieter experience. The Thermalright Peerless Assassin 120 SE also boasts a noise level of 25.6 dB(A), which is relatively low for a CPU cooler. Therefore, both products aim for quiet operation, although the ARCTIC fan may edge out slightly in noise reduction.
Versatility and Compatibility
The ARCTIC P12 Pro Reverse is a versatile fan that can be used in various setups, whether for case cooling or radiator applications. Its 4-pin PWM connection allows for easy integration into different systems. Conversely, the Thermalright Peerless Assassin 120 SE is specifically designed for compatibility with multiple CPU sockets, including AMD's AM4 and AM5, as well as various Intel sockets. This makes the Thermalright cooler a more specialized choice, demonstrating its focus on CPU cooling.
Installation and Ease of Use
Installation can vary significantly between the two products. The ARCTIC P12 Pro Reverse is straightforward to install, especially for users familiar with fan setups. It includes a Y cable splitter, which simplifies connecting multiple fans. The Thermalright Peerless Assassin 120 SE, however, may require more attention during installation due to its dual-tower design and compatibility considerations. While it comes with the necessary mounting hardware for various CPU sockets, the installation process might be more complex for novice users.
Price Comparison
The price difference between the two products is significant, with the ARCTIC P12 Pro Reverse priced at $18.49 for a three-pack, making it about 63% cheaper than the Thermalright Peerless Assassin 120 SE at $49.99. This pricing strategy makes the ARCTIC fan an attractive option for budget-conscious builders looking to enhance airflow without breaking the bank. Conversely, the Thermalright cooler targets those willing to invest in a more specialized cooling solution for their CPUs.
Which should you buy?
Choosing between the ARCTIC P12 Pro Reverse and the Thermalright Peerless Assassin 120 SE ultimately depends on your specific cooling needs. If you are looking for an affordable, visually appealing fan that provides excellent airflow, the ARCTIC P12 Pro Reverse is the better option. However, if your primary focus is on CPU cooling performance and you are willing to invest in a more comprehensive solution, the Thermalright Peerless Assassin 120 SE is worth considering. Each product has its strengths, so your choice should align with your build's requirements and your budget.

