ARCTIC P9 Max - PC Fan, High-Performance vs Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
Updated August 2026 — Thermalright Assassin X 120R SE V2 CPU Cooler, 4× leads on pipe count and height.
The ARCTIC P9 Max is a cost-effective case fan with high RPM capabilities, while the Thermalright Assassin X offers superior CPU cooling and quieter operation. Choose based on your specific cooling needs.
Why ARCTIC P9 Max - PC Fan, High-Performance is better
Price
ARCTIC P9 Max is cheaper at $9.99
RPM Range
ARCTIC P9 Max has a wider RPM range (450-4300 RPM)
Static Pressure
ARCTIC P9 Max is optimized for static pressure
Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better
Cooling Performance
Thermalright Assassin X has better cooling for CPUs
Noise Level
Thermalright Assassin X operates quieter at 25.6 dB(A)
Compatibility
Thermalright Assassin X supports more CPU sockets
Overall score
Specifications
| Spec | ARCTIC P9 Max - PC Fan, High-Performance | Thermalright Assassin X 120R SE V2 CPU Cooler, 4× |
|---|---|---|
| Max RPM | 4300 | 1550 |
| Airflow (CFM) | 58.25 | 66.17 |
| Noise Level (dB) | N/A | 25.6 |
| Bearing Type | Fluid Dynamic | S-FDB |
| Connector Type | 4-pin | 4-pin |
Dimension comparison
Overview of the Products
In this comparison, we have the ARCTIC P9 Max PC Fan and the Thermalright Assassin X 120R SE V2 CPU Cooler. The ARCTIC P9 Max is priced at $9.99, making it about 17% cheaper than the Thermalright Assassin X, which retails for $16.59. While both products aim to improve cooling efficiency, they serve different purposes in a computer build. The ARCTIC P9 Max is a case fan designed for optimal airflow and static pressure, while the Thermalright Assassin X is a CPU cooler designed specifically for processors.
Design and Build Quality
The ARCTIC P9 Max features a high-performance design with a sleek black finish, making it visually appealing for any PC build. It utilizes a fluid dynamic bearing that ensures a long service life and silent operation. In contrast, the Thermalright Assassin X comes with a more complex structure, featuring four 6mm heat pipes and a 120mm RGB PWM fan. The use of quality S-FDB bearings in the Assassin X minimizes noise while maximizing cooling performance, making it an excellent choice for those who prioritize a quiet computing experience.
Cooling Performance
Cooling performance is where these two products truly diverge. The ARCTIC P9 Max can achieve fan speeds ranging from 450 to 4300 RPM, providing a maximum airflow of 58.25 CFM. This makes it ideal for situations where high static pressure is needed, such as on heat sinks or radiators. On the other hand, the Thermalright Assassin X operates at a maximum speed of 1550 RPM with an airflow of 66.17 CFM. This allows it to provide efficient cooling for CPUs, especially under load, while maintaining a noise level of less than 25.6 dB(A).
Noise Levels
When it comes to noise levels, the ARCTIC P9 Max has an advantage at lower RPMs, remaining silent below 5% PWM. However, as it ramps up to its maximum speed of 4300 RPM, it may generate more noise. The Thermalright Assassin X is designed for quiet operation, with a maximum noise level of only 25.6 dB(A). This makes it a more suitable option for users who prefer a quieter computing environment, especially during intense gaming or work sessions.
Compatibility
Compatibility is another critical factor when choosing between these products. The ARCTIC P9 Max uses a standard 4-pin fan connector, making it easy to integrate into most setups. It is versatile enough to be used with various heat sinks and radiators. On the other hand, the Thermalright Assassin X supports a wide range of CPU sockets, including Intel's LGA1150/1151/1155/1156/1200/1700 and AMD's AM4/AM5. This broad compatibility makes it a more flexible option for users who may change or upgrade their CPUs in the future.
Installation Process
The installation process for both products is straightforward but varies in complexity. The ARCTIC P9 Max is a simple case fan installation, requiring only mounting it in a fan slot. Conversely, the Thermalright Assassin X involves a more detailed installation process, as it comes with metal fasteners for different CPU platforms. While it may require more time and effort to install, the improved cooling performance it offers can justify the extra steps.
Aesthetic Appeal
For users concerned about aesthetics, the Thermalright Assassin X offers RGB lighting, providing an added visual flair to any build. The self-luminous fan lights up once powered, adding a custom touch that can enhance the look of your setup. In comparison, the ARCTIC P9 Max has a minimalist design with no RGB features. While it may not have the same aesthetic appeal, its sleek black design can still blend well with various setups.
Which should you buy?
In conclusion, the decision between the ARCTIC P9 Max and the Thermalright Assassin X ultimately depends on your specific needs. If you are looking for a high-performance case fan primarily focused on airflow and static pressure at a lower price point of $9.99, the ARCTIC P9 Max is an excellent choice. However, if you need a robust CPU cooler with better compatibility and quieter operation, the Thermalright Assassin X, priced at $16.59, is worth the investment. The choice boils down to whether you prioritize cost-effectiveness and versatility or superior CPU cooling performance and aesthetics.

