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ARCTIC Liquid Freezer III Pro 240 A-RGB - vs Thermalright Peerless Assassin 120 Digital ARGB

Updated August 2026 — ARCTIC Liquid Freezer III Pro 240 A-RGB - leads on build quality and cooling efficien.

The ARCTIC Liquid Freezer III Pro 240 A-RGB offers superior cooling performance and features, making it the better choice for high-performance builds. However, the Thermalright Peerless Assassin 120 is a cost-effective option for budget-conscious users.

Why ARCTIC Liquid Freezer III Pro 240 A-RGB - is better

Cooling Performance

The ARCTIC cooler has a larger 240 mm radiator.

Integrated Features

Includes an integrated VRM fan for better thermal management.

Noise Levels

Quieter operation at low speeds compared to Thermalright.

Why Thermalright Peerless Assassin 120 Digital ARGB is better

Price

The Thermalright cooler is significantly cheaper.

Size

More compact design fits in smaller cases.

Installation

Easier installation with versatile mounting options.

Overall score

ARCTIC Liquid Freezer III Pro 240 A-RGB -
85
Thermalright Peerless Assassin 120 Digital ARGB
70

Specifications

SpecARCTIC Liquid Freezer III Pro 240 A-RGB -Thermalright Peerless Assassin 120 Digital ARGB
Cooling TypeLiquidAir
Max RPMPWM Controlled1850 RPM
Socket CompatibilityAM5/AM4, LGA1700/1851AM4/AM5, LGA1700/1851/1150/1151/1200
Noise LevelLow≤25.6 dB(A)
RGB LightingYesYes

Dimension comparison

ARCTIC Liquid Freezer III Pro 240 A-RGB -Thermalright Peerless Assassin 120 Digital ARGB

Overview of the ARCTIC Liquid Freezer III Pro 240 A-RGB

The ARCTIC Liquid Freezer III Pro 240 A-RGB is a high-performance all-in-one (AIO) liquid cooler designed for both AMD and Intel CPUs, priced at $80.00. This cooler features a 240 mm radiator and comes equipped with an integrated VRM fan that enhances cooling efficiency by lowering the temperature of voltage converters. Its PWM-controlled pump and fans optimize performance, making it ideal for high-load scenarios, while the native offset mounting ensures effective heat transfer to the CPU.

Overview of the Thermalright Peerless Assassin 120 Digital ARGB

The Thermalright Peerless Assassin 120 Digital ARGB Black is a CPU air cooler available for $45.90, making it about 43% cheaper than the ARCTIC cooler. This model boasts a digital screen on its magnetic top cover and utilizes six heatpipes for efficient heat dissipation. With a maximum fan speed of 1850 RPM and dual fans, it offers impressive airflow and cooling performance, especially for users seeking a cost-effective solution for mid-range systems.

Cooling Performance Comparison

In terms of cooling performance, the ARCTIC Liquid Freezer III Pro 240 A-RGB is built for high efficiency with a 240 mm radiator that is generally favored for overclocking and high-performance builds. The integrated VRM fan is a significant feature, ensuring that voltage converters stay cool under heavy loads. Conversely, the Thermalright Peerless Assassin 120 utilizes six heatpipes and dual fans to provide good thermal management, but its overall 120 mm design may not cool as effectively as the larger AIO system, especially during peak usage.

Installation and Compatibility

The ARCTIC Liquid Freezer III Pro 240 is compatible with a range of AMD and Intel sockets, including AM5, AM4, and LGA1700/1851. The native offset mounting system ensures an optimal fit, enhancing heat transfer. The Thermalright Peerless Assassin 120 is also versatile, supporting multiple platforms, including AM4/AM5 and various Intel sockets. However, the slightly larger size of the ARCTIC cooler may require more consideration regarding case compatibility, especially in smaller ATX chassis.

Noise Levels and Acoustic Performance

The ARCTIC Liquid Freezer III Pro 240 is designed for quieter operation, particularly at low speeds, where it outperforms many fans in its class. Its optimized fan design reduces noise, making it suitable for users who prioritize a quiet computing experience. In contrast, the Thermalright Peerless Assassin 120 operates with a maximum noise level of 25.6 dB(A). While this is relatively quiet, it cannot match the low-noise performance of the ARCTIC cooler under heavy workloads, making the latter a better choice for noise-sensitive environments.

Aesthetic Appeal

For users who value aesthetics, the ARCTIC Liquid Freezer III Pro 240 A-RGB features addressable RGB lighting, allowing for customizable light effects that can sync with other RGB components. The sleek design of the cooler complements modern builds. The Thermalright Peerless Assassin 120 also incorporates RGB elements with its digital screen and magnetic top cover, adding a stylish touch. While both coolers offer RGB features, the ARCTIC's more extensive customization options may appeal more to gamers and enthusiasts who enjoy visual flair.

Price Considerations

The price difference between the two coolers is significant, with the ARCTIC Liquid Freezer III Pro 240 priced at $80.00 and the Thermalright Peerless Assassin 120 at $45.90. This makes the Thermalright option about 43% cheaper, which could be a deciding factor for budget-conscious consumers. However, the increased price of the ARCTIC cooler reflects its advanced cooling capabilities, integrated VRM fan, and enhanced features, which may justify the investment for users needing superior performance.

Which should you buy?

Choosing between the ARCTIC Liquid Freezer III Pro 240 A-RGB and the Thermalright Peerless Assassin 120 Digital ARGB ultimately depends on your specific needs and budget. If you're looking for high-performance cooling, particularly for overclocking or high-load applications, the ARCTIC cooler is worth the investment, offering advanced features and better cooling efficiency. However, if you are on a tighter budget and require a solid cooling solution for a mid-range system, the Thermalright Peerless Assassin 120 provides excellent performance at a significantly lower price.