ARCTIC P12 Pro A-RGB - Powerful Premium Fan, vs Thermalright Peerless Assassin 120 Black CPU Air
Updated August 2026 — ARCTIC P12 Pro A-RGB - Powerful Premium Fan, wins on noise level, Thermalright Peerless Assassin 120 Black CPU Air wins on compatibility and cooling eff..
The ARCTIC P12 Pro A-RGB is a budget-friendly fan with excellent airflow, while the Thermalright Peerless Assassin 120 Black offers superior cooling performance for high-end CPUs. Choose based on your cooling needs.
Why ARCTIC P12 Pro A-RGB - Powerful Premium Fan, is better
Price
ARCTIC P12 Pro A-RGB is significantly cheaper.
Noise Level
ARCTIC fan operates quieter at low RPM.
Aesthetic
ARCTIC fan features RGB lighting.
Why Thermalright Peerless Assassin 120 Black CPU Air is better
Cooling Performance
Thermalright cooler handles higher thermal loads.
Build Quality
Thermalright has a robust dual tower design.
Heat Dissipation
Thermalright uses advanced AGHP technology.
Overall score
Specifications
| Spec | ARCTIC P12 Pro A-RGB - Powerful Premium Fan, | Thermalright Peerless Assassin 120 Black CPU Air |
|---|---|---|
| Max RPM | 3000 | 1500 |
| Noise Level | ≤25 dB(A) | ≤25.6 dB(A) |
| TDP Rating | N/A | 245W |
| Fan Type | PWM Fan | PWM Fan |
| RGB Lighting | Yes | No |
Dimension comparison
Overview of the ARCTIC P12 Pro A-RGB and Thermalright Peerless Assassin 120 Black
The ARCTIC P12 Pro A-RGB is priced at $13.49, while the Thermalright Peerless Assassin 120 Black is significantly more expensive at $38.90, making it about 187% pricier than the ARCTIC fan. Both products are designed to enhance cooling performance, but they cater to different needs. The ARCTIC P12 Pro A-RGB is a 120 mm PWM fan, ideal for maximizing airflow in various setups, while the Thermalright Peerless Assassin is a comprehensive CPU air cooler featuring advanced technology for superior heat dissipation.
Design and Build Quality
The ARCTIC P12 Pro A-RGB boasts a sleek white design that combines functionality with aesthetics, featuring a fluid dynamic bearing for smooth operation. It operates silently thanks to minimal vibrations. On the other hand, the Thermalright Peerless Assassin 120 Black showcases a robust dual tower design with an aluminum heatsink cover, weighing in at 1.02 kg. Its black electroplating and nanoscale paint application not only enhance its appearance but also improve heat dissipation. While the fan is lightweight and optimized for airflow, the cooler's design emphasizes effective thermal management.
Cooling Performance
Cooling performance is where these two products diverge significantly. The ARCTIC P12 Pro A-RGB can achieve fan speeds of 600 to 3000 RPM, catering to a wide range of cooling needs, especially in high-resistance environments. Its high static pressure and optimized blade design ensure reliable airflow. Conversely, the Thermalright Peerless Assassin's dual fans maintain a maximum speed of 1500 RPM but utilize six heat pipes and AGHP technology to efficiently tackle heat dissipation. This cooler is rated for a TDP of 245W, making it suitable for high-performance CPUs.
Noise Levels
The ARCTIC P12 Pro A-RGB is engineered for quiet operation, producing minimal noise thanks to its fluid dynamic bearing and design aimed at reducing vibrations. It can run at a low RPM, contributing to an ultra-quiet environment. In contrast, the Thermalright Peerless Assassin has a noise level of ≤25.6 dB(A), which is reasonable for a CPU cooler but might be slightly more audible compared to the ARCTIC fan when both are under load. The ARCTIC fan's ability to stop completely at less than 5% PWM further enhances its silent operation.
Installation and Compatibility
The ARCTIC P12 Pro A-RGB is user-friendly, with a straightforward installation process that suits a variety of builds. It can connect via a 4-pin PWM cable and includes a Y-cable splitter for multiple fan setups. On the other hand, the Thermalright Peerless Assassin is compatible with a broad range of CPU sockets, including Intel LGA 1700 and AMD AM4/AM5. Its design allows for easy installation, even in tight spaces, thanks to its offset asymmetric layout that avoids interference with graphics cards.
Aesthetic Appeal
Aesthetic appeal can be a deciding factor for many builders. The ARCTIC P12 Pro A-RGB features digital RGB lighting that can enhance the look of your build, especially in cases with tempered glass panels. The white color adds a modern touch, making it an attractive choice for those who prioritize visual aspects. Meanwhile, the Thermalright Peerless Assassin 120 Black brings a sleek, professional look with its matte black finish. While it lacks RGB lighting, its design is geared more towards performance and functionality, which may appeal to minimalist setups.
Price Comparison
The ARCTIC P12 Pro A-RGB is priced at $13.49, making it a budget-friendly option for those looking to enhance airflow without breaking the bank. In contrast, the Thermalright Peerless Assassin 120 Black, at $38.90, represents a more significant investment, approximately 187% higher than the ARCTIC fan. This price difference reflects the added complexity and performance capabilities of a full CPU cooler compared to a standalone fan, making it essential for buyers to consider their specific cooling needs and budget.
Which should you buy?
Choosing between the ARCTIC P12 Pro A-RGB and the Thermalright Peerless Assassin 120 Black ultimately depends on your specific requirements. If you seek a cost-effective solution for enhancing airflow in your case, the ARCTIC P12 Pro A-RGB is an excellent choice with its quiet operation and impressive RPM range. However, if you need a robust CPU cooling solution capable of handling higher thermal loads, the Thermalright Peerless Assassin is the superior option, albeit at a higher price. Consider your cooling needs, budget, and aesthetic preferences to make the best choice for your build.

