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ARCTIC Liquid Freezer III Pro 240 - AIO CPU Cooler vs Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler

Updated August 2026The ARCTIC Liquid Freezer III Pro 240 offers superior cooling performance and quieter operation compared to the Thermalright Peerless Assassin 120 SE. However, the Thermalright is a more budget-friendly option.

The ARCTIC Liquid Freezer III Pro 240 offers superior cooling performance and quieter operation compared to the Thermalright Peerless Assassin 120 SE. However, the Thermalright is a more budget-friendly option.

Why ARCTIC Liquid Freezer III Pro 240 - AIO CPU Cooler is better

cooling performance

Liquid cooling provides better thermal management.

noise levels

Quieter operation at low speeds.

brand reputation

ARCTIC is known for high-quality cooling solutions.

Why Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler is better

price

More affordable at £28.79.

aesthetics

Features customizable ARGB lighting.

installation

Offers unrestricted RAM clearance.

Overall score

ARCTIC Liquid Freezer III Pro 240 - AIO CPU Cooler
85
Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler
70

Specifications

SpecARCTIC Liquid Freezer III Pro 240 - AIO CPU CoolerThermalright Peerless Assassin 120 SE ARGB CPU Air Cooler
Cooling TypeLiquidAir
Socket SupportIntel LGA1700, AMDIntel 115X/1200/1700/AM4/AM5
Noise Level≤25 dB(A)≤25.6 dB(A)
Fan Count12
ARGB LightingNoYes

Dimension comparison

ARCTIC Liquid Freezer III Pro 240 - AIO CPU CoolerThermalright Peerless Assassin 120 SE ARGB CPU Air Cooler

Overview of the ARCTIC Liquid Freezer III Pro 240

The ARCTIC Liquid Freezer III Pro 240 is a powerful AIO CPU cooler priced at £56.49. It is designed with advanced features that enhance cooling performance and longevity of the CPU. This cooler employs a unique contact frame for Intel LGA1851 and LGA1700 sockets, optimising contact pressure distribution, which helps in better heat dissipation and prolongs CPU life.

Moreover, it incorporates ARCTIC's P12 PRO fan technology, which provides more power at any speed compared to its predecessor, the P12. This results in a quieter operation, particularly at low speeds, while maintaining a higher maximum speed under heavy loads. Additionally, the cooler has an integrated VRM fan that aids in lowering the temperature of voltage converters, ensuring reliable performance.

Overview of the Thermalright Peerless Assassin 120 SE

The Thermalright Peerless Assassin 120 SE ARGB is an air cooler that offers excellent value at just £28.79. With over 20 years of expertise in the industry, Thermalright has created a product that not only focuses on cooling efficiency but also features a visually appealing ARGB lighting system.

This cooler is equipped with two PWM fans that operate at a speed of 1500 RPM, generating an airflow of 66.17 CFM while maintaining a noise level of no more than 25.6 dB(A). The use of six copper heat pipes with AGHP technology ensures effective heat transfer, even in different orientations, making it a versatile choice for various installations.

Cooling Performance

When it comes to cooling performance, the ARCTIC Liquid Freezer III Pro 240 stands out with its advanced liquid cooling capabilities. The P12 PRO fan is engineered to provide optimal cooling performance under heavy loads, making it ideal for high-performance CPUs. In contrast, the Thermalright Peerless Assassin 120 SE, while effective, relies on air cooling and has a maximum airflow of 66.17 CFM.

This significant difference suggests that the ARCTIC cooler may offer superior thermal management, especially for users pushing their CPUs to the limits. Liquid cooling generally provides more consistent temperatures during intense gaming or multitasking sessions compared to air coolers, making the ARCTIC a compelling option for enthusiasts.

Noise Levels

In terms of noise levels, the Thermalright Peerless Assassin 120 SE boasts a maximum noise level of 25.6 dB(A), which is relatively quiet. However, the ARCTIC Liquid Freezer III Pro 240 excels in this aspect as well, with its fans operating more quietly, especially at lower speeds. The P12 PRO fan technology allows for a quieter performance while maintaining high airflow.

For users looking for a cooler that operates silently, especially during less intensive tasks, the ARCTIC may have the edge. However, the Thermalright still presents a respectable performance for those who prioritise budget over absolute silence.

Installation Ease

Both coolers offer an ease of installation, but they cater to different user preferences. The ARCTIC Liquid Freezer III Pro 240 features native offset mounting for both Intel and AMD sockets, allowing for efficient heat transfer by shifting the cold plate centre towards the CPU hotspot. This thoughtful design simplifies the installation process and optimises performance.

On the other hand, the Thermalright Peerless Assassin 120 SE comes equipped with mounting components for various CPU socket platforms, including Intel's latest offerings and AMD's AM4 and AM5. Its design allows for unrestricted RAM clearance, which is an important consideration for many users.

Design and Aesthetics

The ARCTIC Liquid Freezer III Pro 240 presents a sleek, modern design that is typical of liquid coolers, providing a clean look within a PC case. However, it lacks RGB lighting features that are becoming increasingly popular in the gaming community.

Conversely, the Thermalright Peerless Assassin 120 SE shines in the aesthetics department with its ARGB lighting effects, allowing users to customise their build's appearance. This can be particularly appealing to those who enjoy showcasing their PC setups.

Brand Reputation

ARCTIC is known for its commitment to quality and performance in the cooling market, with a strong reputation for producing reliable products that enhance system longevity. The Liquid Freezer III Pro 240 is backed by this legacy, promising effective cooling and a robust design.

Thermalright, with over two decades in the industry, is also a reputable brand, particularly in the air cooling segment. It has gained popularity for delivering solid performance at competitive prices. Both brands have their strengths, but ARCTIC's focus on innovation in liquid cooling gives it a slight edge in this comparison.

Which should you buy?

In conclusion, the decision between the ARCTIC Liquid Freezer III Pro 240 and the Thermalright Peerless Assassin 120 SE boils down to individual needs and budget. If you seek superior cooling performance and quieter operation, the ARCTIC is the better choice at £56.49. However, for those on a tighter budget who still desire solid performance and aesthetic appeal, the Thermalright, priced at £28.79, presents an excellent option. Ultimately, your choice should align with your performance requirements, aesthetic preferences, and budget constraints.

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ARCTIC Liquid Freezer III Pro 240 - AIO CPU Cooler vs Thermalright Peerless Assassin 120 SE ARGB CPU Air Cooler | versusfinder