ARCTIC Liquid Freezer III Pro 240 A-RGB - vs Thermalright Peerless Assassin 120 SE V3 CPU Air
Updated August 2026 — ARCTIC Liquid Freezer III Pro 240 A-RGB - leads on aesthetics and build quality.
The ARCTIC Liquid Freezer III Pro offers superior cooling performance and aesthetics, while the Thermalright Peerless Assassin is a budget-friendly option. Choose based on your cooling needs and budget.
Why ARCTIC Liquid Freezer III Pro 240 A-RGB - is better
Cooling Performance
Liquid cooling outperforms air cooling.
Noise Levels
Quieter operation at low speeds.
Aesthetics
A-RGB lighting enhances visual appeal.
Why Thermalright Peerless Assassin 120 SE V3 CPU Air is better
Price
Significantly cheaper than ARCTIC.
Installation
Compatible with a wide range of sockets.
Compact Size
More suitable for smaller builds.
Overall score
Specifications
| Spec | ARCTIC Liquid Freezer III Pro 240 A-RGB - | Thermalright Peerless Assassin 120 SE V3 CPU Air |
|---|---|---|
| Cooling Type | Liquid | Air |
| Max RPM | 1800 | 2000 |
| Noise Level | ≤25 dB | ≤29.8 dB |
| Compatibility | AM5/AM4, LGA1700 | AM5/AM4, LGA1851 |
| Price | $80.00 | $35.90 |
Dimension comparison
Overview of the ARCTIC Liquid Freezer III Pro 240 A-RGB
The ARCTIC Liquid Freezer III Pro 240 A-RGB is a top-of-the-line all-in-one (AIO) CPU cooler, offering advanced cooling capabilities. Priced at $80.00, it features a 240 mm radiator along with an integrated VRM fan that enhances cooling efficiency and reliability. This AIO cooler is designed for both AMD and Intel processors, ensuring a broad compatibility range.
With native offset mounting for Intel and AMD, it optimizes heat transfer by shifting the cold plate center toward the CPU hotspot. The ARCTIC's P12 Pro fan is engineered to perform exceptionally well at various speeds, making it powerful yet quieter than previous models. The integrated cable management reduces clutter, enhancing the overall aesthetic of your PC build.
Overview of the Thermalright Peerless Assassin 120 SE V3
The Thermalright Peerless Assassin 120 SE V3 represents an effective air cooling solution at a budget-friendly price of $35.90, making it about 55% cheaper than the ARCTIC Liquid Freezer III Pro. This dual-tower cooler employs six heat pipes and dual 120 mm PWM fans that can reach speeds of up to 2000 RPM, providing excellent heat dissipation.
Constructed from aluminium and featuring advanced AGHP heat pipe technology, it offers impressive cooling capabilities, suitable for both AMD and Intel platforms. The cooler is designed to adapt automatically to temperature changes, ensuring optimal performance without manual adjustments. Its compact size allows for a wide range of compatibility with various builds.
Cooling Performance Comparison
When comparing cooling performance, the ARCTIC Liquid Freezer III Pro 240 A-RGB typically outperforms the Thermalright Peerless Assassin 120 SE V3 due to its liquid cooling mechanism. The 240 mm radiator design allows for more efficient heat dissipation compared to the air-based cooling of the Peerless Assassin with its dual 120 mm fans.
The AIO cooler's integrated VRM fan contributes to better overall thermal management, especially under heavy loads, ensuring that the voltage converters remain cool. For users pushing their CPUs to the limit, the ARCTIC cooler's ability to manage heat effectively may justify its higher price point.
Noise Levels and Acoustic Performance
In terms of noise levels, the ARCTIC Liquid Freezer III Pro boasts a quieter operation, especially at low speeds. Its P12 Pro fans are engineered for lower noise, providing a more tranquil computing environment. While specific decibel levels are not provided, users can expect a significant reduction in noise compared to traditional air coolers.
On the other hand, the Thermalright Peerless Assassin 120 SE V3 operates at a maximum noise level of 29.8 dB(A). Although this is relatively quiet for an air cooler, it may be audible under heavy load conditions. Users seeking silence in their builds may lean toward the ARCTIC AIO, particularly if they plan to overclock their CPUs.
Installation and Compatibility
Installation ease can significantly impact user experience, and both coolers have their strengths. The ARCTIC Liquid Freezer III Pro features native offset mounting for Intel and AMD platforms, simplifying the installation process. The integrated cable management is also a plus, minimizing cable clutter.
Conversely, the Thermalright Peerless Assassin 120 SE V3 is compatible with a wide range of sockets, including Intel LGA 1851/1700 and AMD AM4/AM5. However, users must utilize the motherboard's original backplate for AMD installations, which could complicate the process for some. Overall, while both coolers are user-friendly, the ARCTIC offers a more streamlined installation experience.
Aesthetics and Design
In terms of aesthetics, the ARCTIC Liquid Freezer III Pro comes with A-RGB lighting, allowing users to customize their cooling setup to match their build's theme. The sleek design of the AIO gives it a modern look, particularly appealing to gamers and PC enthusiasts who value visual performance alongside functionality.
The Thermalright Peerless Assassin 120 SE V3, while more utilitarian in appearance, still features a stylish blackened anodic top sheet and an aluminium heatsink cover. Its dual-tower design adds a rugged look that some users may prefer, but it lacks the RGB flair that can enhance the visual appeal of a gaming setup.
Price Consideration
Price is a significant aspect to consider when choosing between these two coolers. The ARCTIC Liquid Freezer III Pro is priced at $80.00, while the Thermalright Peerless Assassin 120 SE V3 costs only $35.90. This price difference of about $44.10 makes the Thermalright a compelling option for budget-conscious buyers.
For those who are not planning on overclocking or do not need the advanced cooling performance of an AIO, the Peerless Assassin offers excellent value for money. However, users who prioritize maximum cooling efficiency and aesthetics may find the ARCTIC cooler worth the investment.
Which should you buy?
Ultimately, the choice between the ARCTIC Liquid Freezer III Pro 240 A-RGB and the Thermalright Peerless Assassin 120 SE V3 boils down to individual needs and preferences. If you seek top-tier cooling performance, especially for overclocking, and are willing to invest more, the ARCTIC cooler is the superior option. Its efficient cooling, quiet operation, and aesthetic appeal make it an excellent choice for high-performance builds.
Conversely, if you're on a budget and need a reliable cooler for standard use, the Thermalright Peerless Assassin 120 SE V3 provides exceptional value at a significantly lower price point. It offers solid cooling performance, especially for non-overclocked systems, while being easy to install and compatible with various configurations.

