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ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - vs Thermalright Peerless Assassin 120 Black CPU Air

Updated August 2026 — ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - leads on cooling performa and build quality.

The ID-COOLING FX240 PRO offers superior cooling performance and advanced technology, while the Thermalright Peerless Assassin is a budget-friendly option with solid performance. Choose based on your cooling needs and budget.

Why ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - is better

Cooling Performance

Higher TDP of 300W vs 245W

Pump Efficiency

2900 RPM pump for better heat dissipation

Aesthetic Design

Modern all-black layout with unique pump header

Why Thermalright Peerless Assassin 120 Black CPU Air is better

Price

More affordable at $38.90

Noise Levels

Quieter operation at 25.6 dB(A)

Installation Flexibility

Asymmetric layout allows for better GPU clearance

Overall score

ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop -
85
Thermalright Peerless Assassin 120 Black CPU Air
75

Specifications

SpecID-COOLING FX240 PRO Liquid CPU Cooler for Desktop -Thermalright Peerless Assassin 120 Black CPU Air
Cooling TypeLiquidAir
Max Airflow82.5 CFM66.17 CFM
Pump RPM2900 RPM1500 RPM
Noise LevelN/A25.6 dB(A)
Socket CompatibilityIntel & AMDIntel & AMD

Dimension comparison

ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop -Thermalright Peerless Assassin 120 Black CPU Air

Overview of the Products

The ID-COOLING FX240 PRO Liquid CPU Cooler is priced at $54.99, while the Thermalright Peerless Assassin 120 Black CPU Cooler comes in at $38.90, making it about 17% cheaper than its counterpart. Both products cater to users looking for effective cooling solutions for their CPUs, but they do so through different technologies—liquid cooling versus air cooling. This comparison will explore their features, performance, design, and more to help you decide which might be the best fit for your needs.

Cooling Performance

When it comes to cooling performance, the ID-COOLING FX240 PRO boasts a TDP (Thermal Design Power) of 300W, making it capable of handling more heat compared to the Thermalright Peerless Assassin's TDP of 245W. The FX240 PRO features a powerful pump that operates at 2900 RPM, efficiently dissipating heat from the CPU. In contrast, the Peerless Assassin utilizes six heat pipes and dual 120mm PWM fans that can deliver a maximum airflow of 66.17 CFM. While both coolers are designed for high-performance computing, the liquid cooler generally provides superior cooling efficiency in demanding scenarios.

Installation and Compatibility

Installation is a significant factor when choosing a CPU cooler. The ID-COOLING FX240 PRO is compatible with a wide range of Intel and AMD sockets, including Intel LGA 1851 and AMD AM4. The simplicity of its daisy chain connector also aids in reducing cable clutter, facilitating an easier installation process. On the other hand, the Thermalright Peerless Assassin supports an equally extensive range of sockets, such as Intel LGA 1700 and AMD AM5. Its offset asymmetric layout allows for installation even when the first graphics card slot is in use, enhancing its versatility. Both products are user-friendly, but the FX240 PRO's design may offer a slight edge in terms of cable management.

Aesthetic Appeal

Aesthetic considerations are essential for many PC builders, and both coolers bring unique designs to the table. The ID-COOLING FX240 PRO features an all-black layout that blends seamlessly into dark-themed builds, complemented by a special CD-pattern pump header that adds a touch of style. In contrast, the Thermalright Peerless Assassin sports an elegant black finish with an aluminum heatsink cover, which also enhances its visual appeal. While both coolers are designed to be visually pleasing, the FX240 PRO might attract users looking for a more modern and unique look.

Noise Levels

Noise levels can significantly affect user experience, especially in quiet environments. The ID-COOLING FX240 PRO's fans produce a maximum airflow of 82.5 CFM, whereas the Thermalright Peerless Assassin's fans operate at a quieter maximum noise level of 25.6 dB(A) while delivering 66.17 CFM. The FX240 PRO's design aims for extreme cooling performance, which might lead to increased noise under heavy loads. If maintaining a quieter PC is a priority for you, the Thermalright cooler could be a better option, especially given its less intrusive operational noise.

Build Quality and Durability

Both coolers feature robust construction suited for long-term use. The ID-COOLING FX240 PRO is equipped with high-quality materials and a powerful pump designed to last, while the Thermalright Peerless Assassin utilizes a full electroplating reflow welding process and aluminum heatsink cover, enhancing its durability. The inclusion of six heat pipes in the Peerless Assassin also suggests a thoughtful design aimed at maximizing heat dissipation. Both products are built to withstand the demands of high-performance computing, but the FX240 PRO's liquid cooling system may provide a longer lifespan due to its efficient thermal management.

Price Considerations

Price is a crucial factor in any purchasing decision. The ID-COOLING FX240 PRO is priced at $54.99, whereas the Thermalright Peerless Assassin is more budget-friendly at $38.90. This price difference of about $16 might be significant for those on a strict budget. While the FX240 PRO offers advanced cooling capabilities, the more affordable option does not compromise on performance, making it a solid choice for users looking to save money without sacrificing too much in terms of cooling efficiency.

User Reviews and Reception

While specific sales ranks for these products aren't provided, user reviews often reflect overall satisfaction and performance. The ID-COOLING FX240 PRO is typically favored by enthusiasts who require high-performance cooling, especially for gaming and overclocking, while the Thermalright Peerless Assassin has garnered praise for its effective cooling at a lower price point. Both products have their dedicated user bases, suggesting that each has its strengths depending on the buyer's specific needs and expectations.

Which should you buy?

The decision between the ID-COOLING FX240 PRO Liquid CPU Cooler and the Thermalright Peerless Assassin 120 Black CPU Cooler ultimately comes down to your specific needs and budget. If you prioritize extreme cooling performance and are willing to invest a bit more, the FX240 PRO is an excellent choice with its higher TDP and advanced liquid cooling technology. However, if you are looking for a reliable air cooler that offers good performance at a more approachable price point, the Thermalright Peerless Assassin is a strong contender. Consider your cooling needs, budget constraints, and aesthetic preferences to make the best choice for your setup.