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Thermalright Peerless Assassin 120 SE CPU Air Cooler vs ARCTIC Liquid Freezer III Pro 360 - AIO CPU Cooler

Updated August 2026The ARCTIC Liquid Freezer III Pro 360 offers superior cooling performance and advanced features, making it the better choice for high-end users. However, the Thermalright Peerless Assassin 120 SE is a solid budget option.

The ARCTIC Liquid Freezer III Pro 360 offers superior cooling performance and advanced features, making it the better choice for high-end users. However, the Thermalright Peerless Assassin 120 SE is a solid budget option.

Why Thermalright Peerless Assassin 120 SE CPU Air Cooler is better

price

Thermalright is significantly cheaper at £26.90

installation

Easier installation with metal fasteners for various sockets

noise level

Operates quietly at 25.6 dB(A)

Why ARCTIC Liquid Freezer III Pro 360 - AIO CPU Cooler is better

cooling performance

Superior cooling with P12 PRO fans and 360mm radiator

advanced features

Integrated VRM fan for better thermal management

aesthetics

Integrated cable management for a cleaner build

Overall score

Thermalright Peerless Assassin 120 SE CPU Air Cooler
75
ARCTIC Liquid Freezer III Pro 360 - AIO CPU Cooler
88

Specifications

SpecThermalright Peerless Assassin 120 SE CPU Air CoolerARCTIC Liquid Freezer III Pro 360 - AIO CPU Cooler
Cooling TypeAirLiquid
Max RPM15502000
Airflow66.17 CFMN/A
Noise Level25.6 dB(A)Quieter
Socket CompatibilityIntel & AMDIntel & AMD

Dimension comparison

Thermalright Peerless Assassin 120 SE CPU Air CoolerARCTIC Liquid Freezer III Pro 360 - AIO CPU Cooler

Introduction to CPU Coolers

When it comes to maintaining optimal temperatures for your CPU, choosing the right cooler is essential. The Thermalright Peerless Assassin 120 SE CPU Air Cooler and the ARCTIC Liquid Freezer III Pro 360 AIO CPU Cooler present two distinct approaches to cooling solutions. The Thermalright unit is a traditional air cooler priced at £26.90, while the ARCTIC model is a liquid cooler that commands a higher price of £67.49. Each has unique features aimed at providing efficient cooling performance, catering to different user needs.

Design and Build Quality

The design philosophy behind the Thermalright Peerless Assassin 120 SE focuses on a robust air cooler configuration with dimensions of 125mm x 135mm x 155mm. It features double tower cooling and is constructed with aluminium, promising durability and efficient heat dissipation. In contrast, the ARCTIC Liquid Freezer III Pro 360 adopts an all-in-one liquid cooling design that is more complex, featuring a 360mm radiator which enhances cooling capacity but requires more space in the case. The materials used in the ARCTIC cooler focus on optimised contact pressure distribution, enhancing heat dissipation for a longer CPU lifespan.

Cooling Performance

The Thermalright cooler is equipped with dual PWM fans that operate at a maximum speed of 1550 RPM, creating an airflow of 66.17 CFM while maintaining a noise level of 25.6 dB(A). This makes it a solid performer for most gaming and productivity tasks. The ARCTIC Liquid Freezer III Pro 360, however, takes cooling performance to another level with its P12 PRO fans, which are designed to be more powerful and quieter, especially at low speeds. This AIO cooler’s higher maximum speed translates to superior thermal management during intense workloads, making it an excellent choice for overclockers and high-performance builds.

Installation and Compatibility

When it comes to installation, the Thermalright Peerless Assassin is designed for ease of use, featuring metal fasteners compatible with a wide range of Intel and AMD sockets, including LGA1700 and AM5. This versatility ensures that it can fit into various builds without hassle. The ARCTIC Liquid Freezer III Pro 360 also boasts native offset mounting for both Intel and AMD platforms, which enhances heat transfer efficiency. The integrated cable management system in the ARCTIC cooler further simplifies installation by reducing cable clutter, making it a cleaner option for builders who value aesthetics as much as performance.

Noise Levels

Noise output is an important consideration for many users, especially those who prefer a quieter working environment. The Thermalright Peerless Assassin operates at a maximum noise level of 25.6 dB(A), making it a relatively quiet air cooler suitable for standard usage. In comparison, while the ARCTIC Liquid Freezer III Pro 360 prioritises performance, it is designed to be quieter than its predecessor, particularly at lower fan speeds. This means that users can expect effective cooling without the distracting sounds often associated with high-performance fans.

Price and Value for Money

At £26.90, the Thermalright Peerless Assassin 120 SE offers an excellent entry point for budget-conscious builders who still require reliable cooling performance. Its price makes it accessible for a broad audience, particularly those building mid-range systems. On the other hand, the ARCTIC Liquid Freezer III Pro 360, priced at £67.49, reflects its advanced technology and superior cooling capabilities. While it is a more significant investment, those who need top performance for high-end gaming or overclocking may find that the price difference is justified by the benefits.

User Experience and Reviews

User experiences often highlight the ease of installation and effectiveness of the Thermalright Peerless Assassin, making it a favourite among DIY builders who appreciate a straightforward setup. Customer feedback on the ARCTIC Liquid Freezer III Pro 360 tends to focus on its exceptional cooling performance and low noise levels, which are crucial for high-performance builds. Users note that the integrated VRM fan, which cools the voltage converters, adds an extra layer of reliability to the system, further enhancing its reputation.

Which should you buy?

Choosing between the Thermalright Peerless Assassin 120 SE and the ARCTIC Liquid Freezer III Pro 360 ultimately depends on your specific needs and budget. If you are looking for an economical yet effective cooling solution for everyday tasks and moderate gaming, the Thermalright cooler is an excellent choice. However, if you require superior cooling for high-performance tasks and are willing to invest more, the ARCTIC Liquid Freezer III Pro 360 is likely the better option, offering advanced features and exceptional performance.

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Thermalright Peerless Assassin 120 SE CPU Air Cooler vs ARCTIC Liquid Freezer III Pro 360 - AIO CPU Cooler | versusfinder