ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU vs Thermalright Peerless Assassin 120 Mini Black CPU
Updated July 2026 — ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU wins on radiator size and length, Thermalright Peerless Assassin 120 Mini Black CPU wins on height.
The ARCTIC Liquid Freezer III Pro 360 A-RGB offers superior cooling performance and advanced features, making it ideal for enthusiasts, while the Thermalright Peerless Assassin 120 Mini Black is a budget-friendly option for standard use.
Why ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU is better
Cooling Performance
Superior cooling with a 38 mm radiator and three 120 mm fans.
Aesthetics
Includes RGB lighting for enhanced visual appeal.
Noise Levels
Operates quieter under load compared to Thermalright.
Why Thermalright Peerless Assassin 120 Mini Black CPU is better
Price
Significantly cheaper at $34.39.
Size
Compact design suitable for smaller cases.
Simplicity
Straightforward installation process.
Overall score
Specifications
| Spec | ARCTIC Liquid Freezer III Pro 360 A-RGB - AIO CPU | Thermalright Peerless Assassin 120 Mini Black CPU |
|---|---|---|
| Cooling Type | AIO | Air |
| Fan Speed | PWM | 1500 RPM |
| Heat Pipes | N/A | 6 |
| Socket Support | AM4/AM5, LGA1700 | AM4/AM5, LGA1150/1151 |
| Noise Level | Low | ≤ 25.6 dB(A) |
Dimension comparison
Overview of the Products
The ARCTIC Liquid Freezer III Pro 360 A-RGB is a premium AIO CPU cooler priced at $94.99, while the Thermalright Peerless Assassin 120 Mini Black is a budget-friendly option available for $34.39. Given the price difference of about 175%, these products cater to different segments of the market. The ARCTIC cooler offers advanced features suitable for high-performance systems, whereas the Thermalright cooler is designed for those who need reliable cooling at a lower cost.
Cooling Performance
The ARCTIC Liquid Freezer III Pro 360 A-RGB is engineered for superior cooling performance, featuring a 38 mm radiator and three 120 mm fans that ensure efficient heat dissipation even under high loads. This design allows the cooler to maintain optimal temperatures during demanding tasks. In contrast, the Thermalright Peerless Assassin 120 Mini Black utilizes six heat pipes and a single 120 mm PWM fan with a maximum speed of 1500 RPM. While it effectively cools CPUs, it may not match the high-performance cooling capabilities of the ARCTIC model, especially in overclocked scenarios.
Design and Aesthetics
In terms of design, the ARCTIC Liquid Freezer III Pro 360 A-RGB stands out with its sleek black finish and RGB lighting, which can enhance the visual appeal of any build. The cooler also integrates cable management, reducing clutter in your case. On the other hand, the Thermalright Peerless Assassin 120 Mini Black features a fully blackened body with CNC precision micro-engraved copper base, offering a rugged yet minimalist look. While the aesthetics of the Thermalright cooler are appealing, it lacks the customizable RGB features found in the ARCTIC model.
Noise Levels
The ARCTIC Liquid Freezer III Pro 360 A-RGB is designed to operate quietly, thanks to its advanced P12 PRO fans that maintain low noise levels even under load. In contrast, the Thermalright Peerless Assassin 120 Mini Black’s fan operates at a noise level of up to 25.6 dB(A). Although this is relatively quiet for air coolers, the ARCTIC model is engineered for quieter performance, particularly when pushing the system to its limits.
Installation and Compatibility
The installation process for both coolers is straightforward, but they cater to different CPU socket types. The ARCTIC Liquid Freezer III Pro supports AMD AM4/AM5 as well as Intel LGA1851 and LGA1700, making it compatible with a wide range of modern CPUs. The Thermalright Peerless Assassin 120 Mini Black also supports the same AMD and Intel sockets, ensuring compatibility with a variety of systems. However, the ARCTIC’s native offset mounting technology provides better heat transfer efficiency, which may enhance overall performance.
Brand Reputation
ARCTIC is known for its high-performance cooling solutions, consistently receiving positive reviews for quality and innovation. The Liquid Freezer III Pro 360 A-RGB is a testament to this reputation, featuring advanced technology and design. Conversely, Thermalright has over 20 years of experience in the cooling market, and its products are well-regarded for their reliability and value. The Peerless Assassin 120 Mini Black is representative of the brand’s commitment to delivering solid performance at an accessible price point.
Price Comparison
When comparing prices, the ARCTIC Liquid Freezer III Pro 360 A-RGB is priced at $94.99, while the Thermalright Peerless Assassin 120 Mini Black is significantly cheaper at $34.39. This price difference of about $60.60 reflects the distinct markets each cooler targets. The ARCTIC model is aimed at enthusiasts who require top-tier cooling performance, while the Thermalright model serves those looking for cost-effective solutions without compromising essential functionality.
Which should you buy?
Choosing between the ARCTIC Liquid Freezer III Pro 360 A-RGB and the Thermalright Peerless Assassin 120 Mini Black ultimately depends on your specific needs. If you prioritize high-end cooling performance, advanced features, and aesthetic appeal, the ARCTIC model is the clear choice, albeit at a higher price. However, if you are looking for a budget-friendly cooler that offers reliable performance for standard computing tasks, the Thermalright option provides excellent value at about 64% less than the ARCTIC cooler.

