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ARCTIC P12 Pro A-RGB - Powerful Premium Fan, vs Thermalrlght Peerless Assassin 120 SE CPU Air

Updated August 2026 — ARCTIC P12 Pro A-RGB - Powerful Premium Fan, wins on noise level and design, Thermalrlght Peerless Assassin 120 SE CPU Air wins on compatibility and cooling.

The ARCTIC P12 Pro A-RGB is a versatile fan ideal for general cooling, while the Thermalrlght Peerless Assassin 120 SE excels as a dedicated CPU cooler. Choose based on your specific cooling needs.

Why ARCTIC P12 Pro A-RGB - Powerful Premium Fan, is better

Price

ARCTIC P12 Pro is significantly cheaper.

Versatility

Can be used in various applications.

Noise Level

Designed for quieter operation.

Why Thermalrlght Peerless Assassin 120 SE CPU Air is better

Cooling Performance

Better heat dissipation with dual fans and heat pipes.

Build Quality

Constructed with aluminum and copper for durability.

Compatibility

Supports various CPU sockets for easy installation.

Overall score

ARCTIC P12 Pro A-RGB - Powerful Premium Fan,
75
Thermalrlght Peerless Assassin 120 SE CPU Air
85

Specifications

SpecARCTIC P12 Pro A-RGB - Powerful Premium Fan,Thermalrlght Peerless Assassin 120 SE CPU Air
Max RPM30001550
Noise Level≤25 dB(A)≤25.6 dB(A)
AirflowHigh66.17 CFM
Bearing TypeFluid DynamicCopper Heat Pipes
RGB LightingYesNo

Dimension comparison

ARCTIC P12 Pro A-RGB - Powerful Premium Fan,Thermalrlght Peerless Assassin 120 SE CPU Air

Overview of ARCTIC P12 Pro A-RGB and Thermalrlght Peerless Assassin 120 SE

The ARCTIC P12 Pro A-RGB is a powerful 120mm PWM fan priced at $13.49, while the Thermalrlght Peerless Assassin 120 SE is a CPU air cooler featuring dual fans, available for $32.90. The significant price difference of about 144% indicates that these products serve different purposes within the cooling spectrum. The ARCTIC P12 Pro is primarily designed for case ventilation or radiator setups, while the Peerless Assassin is a dedicated CPU cooler, making a direct comparison of their capabilities somewhat nuanced.

Design and Build Quality

In terms of design, the ARCTIC P12 Pro A-RGB features a fluid dynamic bearing and a smooth-running design that minimizes vibrations, enhancing its performance and lifespan. Its aesthetic appeal is elevated by the 5V digital RGB lighting, which adds a visual flair to any build. On the other hand, the Thermalrlght Peerless Assassin 120 SE is constructed with an aluminum heatsink and copper heat pipes, providing solid durability. The heatsink's offset asymmetric layout improves compatibility with other components like graphics cards, which is a thoughtful design choice for users focused on system aesthetics and functionality.

Cooling Performance

When it comes to cooling performance, the ARCTIC P12 Pro can operate at speeds ranging from 600 to 3000 RPM, making it highly versatile for various cooling needs. Its high static pressure is particularly effective for dense radiators and mesh panels, ensuring reliable airflow. Conversely, the Peerless Assassin is equipped with six heat pipes and dual 120mm TL-C12C PWM fans that can reach speeds of 1550 RPM. While the maximum fan speed is lower than that of the ARCTIC fan, the combination of heat pipes and the dual tower design ensures efficient heat dissipation from the CPU, making it an excellent choice for CPU cooling.

Noise Levels

The ARCTIC P12 Pro is designed for quiet operation, with its fluid dynamic bearing contributing to minimal noise during use. This makes it ideal for users who prioritize a quieter computing environment. The Thermalrlght Peerless Assassin, while slightly louder with a rated noise level of ≤25.6 dB(A), still maintains a reasonable sound profile given its significant cooling capabilities. Users who demand performance might find the slightly increased noise acceptable for the enhanced cooling efficiency that the Peerless Assassin offers.

Compatibility

The ARCTIC P12 Pro is a universal fan that can be used in various applications, whether in a case or as part of a cooling system. It connects via a 4-pin PWM connector, allowing for efficient speed control across a wide range. In contrast, the Thermalrlght Peerless Assassin is designed specifically for CPU cooling and is compatible with a variety of Intel and AMD sockets, including LGA 1700 and AM4/AM5. This targeted compatibility makes the Peerless Assassin an excellent choice for those looking to upgrade their CPU cooling solution without worrying about fitment issues.

Installation Process

Installation for the ARCTIC P12 Pro is straightforward, given its design as a fan. Users simply mount it in their case or radiator with standard screws. However, the installation of the Thermalrlght Peerless Assassin requires more attention to detail. It includes a metal pressure plate and SS2 installation system, which ensures optimal contact with the CPU for effective heat transfer. This complexity can be a factor for users who prefer a quick and easy setup, while those who value effective cooling might appreciate the extra effort for better thermal performance.

Price and Value

With the ARCTIC P12 Pro priced at $13.49 and the Thermalrlght Peerless Assassin at $32.90, the ARCTIC fan is about 59% cheaper than the Peerless Assassin. This price difference reflects the distinct functionalities of each product. While the ARCTIC P12 Pro serves as a high-performance fan suitable for general cooling applications, the Thermalrlght Peerless Assassin offers a comprehensive cooling solution for CPUs, justifying its higher price point. Buyers need to consider their specific needs when evaluating the value of each product.

Which should you buy?

The decision between the ARCTIC P12 Pro A-RGB and the Thermalrlght Peerless Assassin 120 SE largely depends on your cooling needs. If you require a versatile and visually appealing fan for case ventilation or radiator use, the ARCTIC P12 Pro is an excellent choice due to its affordability and high static pressure. However, if you are focused on enhancing your CPU cooling performance, the Thermalrlght Peerless Assassin is worth the investment. It features advanced cooling technology and compatibility with various CPU sockets, making it a robust option for serious gamers and overclockers. Ultimately, choose based on whether you need a powerful fan or a dedicated CPU cooler.