ARCTIC P12 Pro PST - Powerful Premium Fan, vs Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
Updated July 2026 — ARCTIC P12 Pro PST - Powerful Premium Fan, wins on depth, Thermalright Assassin X 120R SE V2 CPU Cooler, 4× wins on weight and height.
The ARCTIC P12 Pro PST offers superior performance and value, while the Thermalright Assassin X 120R SE V2 excels in aesthetics and quiet operation.
Why ARCTIC P12 Pro PST - Powerful Premium Fan, is better
Price
ARCTIC is $7.10 cheaper
RPM Range
ARCTIC operates from 600 to 3000 RPM
Cooling Efficiency
ARCTIC has higher static pressure
Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better
Aesthetics
Thermalright features RGB lighting
Build Quality
Thermalright has a robust design with heat pipes
Noise Level
Thermalright operates at 25.6 dB(A)
Overall score
Specifications
| Spec | ARCTIC P12 Pro PST - Powerful Premium Fan, | Thermalright Assassin X 120R SE V2 CPU Cooler, 4× |
|---|---|---|
| Max RPM | 3000 | 1550 |
| Noise Level | ≤25 dB(A) | 25.6 dB(A) |
| Bearing Type | Fluid Dynamic | S-FDB |
| Airflow | N/A | 66.17 CFM |
| PWM Control | Yes | Yes |
Dimension comparison
Overview
The ARCTIC P12 Pro PST and the Thermalright Assassin X 120R SE V2 CPU Cooler are two compelling options in the CPU cooling market, each catering to different user needs. The ARCTIC fan is priced at $9.49, while the Thermalright cooler retails for $16.59, making the ARCTIC option about 43% cheaper. This article dives into the features, performance, and overall value of each product to help you make an informed decision.
Design and Build Quality
The ARCTIC P12 Pro PST boasts a sleek 120 mm design, optimized for high static pressure and efficient airflow. Its fluid dynamic bearing design minimizes noise while enhancing durability. In contrast, the Thermalright Assassin X 120R SE V2 is more robust, featuring a height of 148 mm and four heat pipes for improved heat dissipation. While the ARCTIC fan is designed primarily for optimal airflow through tight spaces, the Thermalright cooler emphasizes overall cooling performance, making it more suitable for heavy-duty tasks.
Cooling Performance
The cooling capabilities of the ARCTIC P12 Pro PST are impressive, operating at speeds between 600 to 3000 RPM. This wide speed range allows for efficient cooling even in demanding conditions, with the fan stopping completely at less than 5% PWM. On the other hand, the Thermalright Assassin X 120R SE V2 operates at a maximum speed of 1550 RPM. Although this is lower than the ARCTIC fan, its four copper heat pipes work in conjunction with a quiet 120 mm RGB PWM fan to provide effective cooling. Users seeking high performance under load may lean towards the ARCTIC, while those desiring a quieter operation might prefer the Thermalright.
Noise Levels
In terms of noise levels, the ARCTIC P12 Pro PST is designed for quiet operation, thanks to its smooth-running fluid dynamic bearing, which minimizes vibrations. While specific noise levels are not detailed, its design suggests that it operates efficiently without excessive sound. Conversely, the Thermalright Assassin X 120R SE V2 has a noise level of about 25.6 dB(A), which is relatively quiet for a CPU cooler. Users who prioritize silence may find the Thermalright to be an appealing option, despite its slightly higher noise output.
Ease of Installation
Both products have been designed with user convenience in mind. The ARCTIC P12 Pro PST comes with a Y-cable splitter, simplifying installation and allowing for multiple fan connections. Meanwhile, the Thermalright Assassin X 120R SE V2 includes metal fasteners for both Intel and AMD platforms, ensuring compatibility and ease of installation for various CPU sockets. The clear instructions provided with the Thermalright cooler further enhance its user-friendliness, making it an excellent choice for first-time builders.
Aesthetic Appeal
Aesthetics play a significant role in computer builds, and here, the Thermalright Assassin X 120R SE V2 takes the lead. It features RGB lighting, which can add a vibrant visual element to your setup. In contrast, the ARCTIC P12 Pro PST is primarily focused on function over form, sporting a sleek black design without RGB features. For users looking to enhance their build's aesthetics, the Thermalright may be more appealing, while those who prefer a minimalist look may favor the ARCTIC.
Compatibility
Compatibility is crucial when selecting a CPU cooler or fan. The ARCTIC P12 Pro PST can fit into various cases due to its standard 120 mm size and flexibility to work alongside other fans. The Thermalright Assassin X 120R SE V2 is equally versatile, supporting multiple CPU sockets, including AMD AM4/AM5 and Intel LGA1150/1151/1155/1156/1200/1700/1851. This broad compatibility makes the Thermalright an excellent choice for users with different system configurations.
Price Comparison
The ARCTIC P12 Pro PST is priced at $9.49, making it a budget-friendly option, whereas the Thermalright Assassin X 120R SE V2 is available for $16.59. This price difference of about $7.10 represents a 43% increase for the Thermalright, which may be justified by its enhanced cooling capabilities and RGB features. Users on a tight budget may find the ARCTIC fan to be a more sensible choice, while those willing to invest more for additional features may prefer the Thermalright.
Which should you buy?
Deciding between the ARCTIC P12 Pro PST and the Thermalright Assassin X 120R SE V2 ultimately hinges on your specific needs. If you prioritize budget and require a high-performance fan capable of operating at a wide RPM range, the ARCTIC P12 Pro PST is a superb choice. However, if you seek a comprehensive CPU cooling solution with aesthetics and quiet operation, the Thermalright Assassin X 120R SE V2 stands out as an excellent alternative. Each product has its own unique strengths, ensuring that there’s a suitable option for various users and their cooling requirements.

