ARCTIC P12 Pro PST - Powerful Premium Fan, vs Thermalright Peerless Assassin 120 Mini Black CPU
Updated July 2026 — ARCTIC P12 Pro PST - Powerful Premium Fan, wins on rpm max and width, Thermalright Peerless Assassin 120 Mini Black CPU wins on weight and height.
The ARCTIC P12 Pro PST is a budget-friendly fan ideal for airflow, while the Thermalright Peerless Assassin offers advanced CPU cooling technology. Choose based on your specific cooling needs.
Why ARCTIC P12 Pro PST - Powerful Premium Fan, is better
Price
ARCTIC P12 Pro PST is significantly cheaper.
Noise Control
ARCTIC fan operates quieter at higher speeds.
Airflow
ARCTIC fan has a higher RPM range.
Why Thermalright Peerless Assassin 120 Mini Black CPU is better
Cooling Performance
Thermalright cooler has advanced heat pipe technology.
Build Quality
Thermalright features a robust design with aluminum body.
Compatibility
Thermalright supports a wide range of CPU sockets.
Overall score
Specifications
| Spec | ARCTIC P12 Pro PST - Powerful Premium Fan, | Thermalright Peerless Assassin 120 Mini Black CPU |
|---|---|---|
| Price | $9.49 | $34.39 |
| Airflow | N/A | 66.87 CFM |
| Noise Level | ≤ 25 dB(A) | ≤ 25.6 dB(A) |
| Bearing Type | Fluid Dynamic | S-FDB |
| Heat Pipes | N/A | 6 |
Dimension comparison
Overview of the Products
When comparing the ARCTIC P12 Pro PST and the Thermalright Peerless Assassin 120 Mini Black CPU Cooler, both products serve different cooling needs within the CPU cooler category. The ARCTIC P12 Pro PST is a powerful 120 mm PWM fan, while the Thermalright Peerless Assassin 120 Mini focuses on CPU cooling with advanced heat pipe technology. The ARCTIC fan is priced at $9.49, whereas the Thermalright cooler comes in at $34.39, making it about 263% more expensive.
Design and Build Quality
The design and build quality of each product cater to their specific functions. The ARCTIC P12 Pro PST features a sleek design with a black finish and a focus on high static pressure for efficient airflow. This makes it particularly suitable for dense radiators and mesh structures. On the other hand, the Thermalright Peerless Assassin boasts a more robust build with six heat pipes and a fully blackened aluminum body that enhances its aesthetic appeal. Its AGHP technology allows for better heat dissipation. While the ARCTIC fan is designed for airflow, the Thermalright cooler emphasizes thermal management, showcasing different design priorities.
Cooling Performance
In terms of cooling performance, the ARCTIC P12 Pro PST operates at a speed range of 600 to 3000 RPM, allowing for dynamic adjustments based on cooling needs. This fan can stop completely at less than 5% PWM, effectively conserving energy when full power isn't needed. The Thermalright Peerless Assassin, equipped with a 120 mm PWM fan, operates at a maximum speed of 1500 RPM, delivering an airflow of 66.87 CFM while maintaining a noise level of up to 25.6 dB(A). While the ARCTIC fan offers a higher RPM range, the Thermalright cooler's design focuses on steady cooling performance, making each product suitable for different scenarios.
Noise Levels
Noise levels are a crucial factor for many users, especially in quiet environments. The ARCTIC P12 Pro PST utilizes a smooth-running fluid dynamic bearing, which minimizes noise during operation, making it ideal for users who prioritize a quiet computing experience. On the contrary, the Thermalright Peerless Assassin operates at a noise level of ≤ 25.6 dB(A), which, while still relatively quiet, is somewhat higher than what the ARCTIC fan achieves at higher speeds. Users seeking whisper-quiet performance may prefer the ARCTIC fan for its superior noise control capabilities.
Installation and Compatibility
Installation and compatibility are vital factors when choosing a cooling solution. The ARCTIC P12 Pro PST is designed as a standalone fan, making it easy to install in various cases without the need for complex setups. Meanwhile, the Thermalright Peerless Assassin is compatible with a wide range of CPU sockets, including Intel’s LGA series and AMD’s AM4/AM5, and is designed for easy installation with appropriate mounting kits. This makes the Thermalright cooler more versatile for users building or upgrading their systems, while the ARCTIC fan is straightforward for those looking to enhance airflow.
Brand Reputation
Brand reputation plays a significant role in consumer choice. ARCTIC is known for its high-quality cooling solutions and has gained popularity for delivering performance-oriented products at accessible prices, with the ARCTIC P12 Pro PST holding a bestseller rank of 12,134. Conversely, Thermalright has been a notable player in the cooler market for over 20 years, emphasizing research and development in its products. While both brands have strong followings, ARCTIC’s focus on performance and affordability may attract budget-conscious users, while Thermalright appeals to those looking for advanced cooling technology.
Value for Money
When considering value for money, the ARCTIC P12 Pro PST stands out as a budget-friendly option at $9.49, making it about 73% cheaper than the Thermalright Peerless Assassin, which is priced at $34.39. For users who simply need a reliable fan for enhanced airflow without the need for a full cooler setup, the ARCTIC fan provides excellent performance for a low price. However, for those requiring a comprehensive CPU cooling solution with advanced technology, the Thermalright cooler may justify its higher price with its superior heat management capabilities.
Which should you buy?
The decision between the ARCTIC P12 Pro PST and the Thermalright Peerless Assassin 120 Mini Black CPU Cooler ultimately hinges on your specific cooling needs. If you're looking for a powerful, budget-friendly fan primarily to boost airflow, the ARCTIC P12 Pro PST is an excellent choice at $9.49. However, if your priority is effective CPU cooling with advanced features and you're willing to invest more, the Thermalright Peerless Assassin at $34.39 offers superior thermal management. Assess your requirements carefully to choose the best product for your setup.

