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ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - vs Thermalright Peerless Assassin 120 SE V3 CPU Air

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

The ID-COOLING FX240 PRO offers superior cooling performance, while the Thermalright Peerless Assassin is a quieter and more affordable option.

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

Cooling Performance

Higher TDP of 300W vs 200W

Airflow

Max airflow of 82.5 CFM vs 70.84 CFM

Design

All-black layout with unique pump design

Why Thermalright Peerless Assassin 120 SE V3 CPU Air is better

Price

Cheaper at $35.90 vs $54.99

Noise Level

Quieter operation at 29.8 dB(A)

Installation

Easier installation with clear instructions

Overall score

ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop -
85
Thermalright Peerless Assassin 120 SE V3 CPU Air
75

Specifications

SpecID-COOLING FX240 PRO Liquid CPU Cooler for Desktop -Thermalright Peerless Assassin 120 SE V3 CPU Air
TDP300W200W
Max Airflow82.5 CFM70.84 CFM
Noise LevelN/A29.8 dB(A)
CompatibilityIntel & AMDIntel & AMD
Fan Speed2900 RPM2000 RPM

Dimension comparison

ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop -Thermalright Peerless Assassin 120 SE V3 CPU Air

Overview of Cooling Solutions

When it comes to effective CPU cooling, the ID-COOLING FX240 PRO Liquid CPU Cooler and the Thermalright Peerless Assassin 120 SE V3 CPU Air Cooler present two different approaches. The ID-COOLING FX240 PRO, priced at $54.99, is a liquid cooling solution known for its high-performance capabilities, while the Thermalright Peerless Assassin is an air cooler available for $35.90, making it about 17% cheaper. Each cooler has unique advantages that cater to different user preferences and system requirements.

Cooling Performance

The ID-COOLING FX240 PRO boasts an impressive thermal design power (TDP) of 300W, supported by a powerful pump that operates at 2900 RPM. This allows for efficient heat dissipation during intense gaming sessions or heavy computational tasks. In contrast, the Thermalright Peerless Assassin features a dual-tower design with six heat pipes and dual 120mm PWM fans that can reach speeds of up to 2000 RPM. While both coolers excel in their capacities, the FX240 PRO has a higher TDP, making it potentially more suitable for overclocking or high-performance setups.

Noise Levels and Operating Conditions

Noise levels are a crucial consideration for many PC builders, and here, the Thermalright Peerless Assassin may have a slight edge. It operates at a maximum noise level of 29.8 dB(A), which is relatively quiet for a CPU cooler. The ID-COOLING FX240 PRO does not specify its noise levels but emphasizes stable performance output. Given the high RPM of the FX240 PRO's pump and fans, it may produce more noise under load compared to the Thermalright cooler. For users prioritizing quiet operation, the Peerless Assassin is likely the better option.

Compatibility with CPU Sockets

Both coolers offer broad compatibility with multiple CPU sockets, supporting various Intel and AMD platforms. The ID-COOLING FX240 PRO is compatible with Intel LGA1851/1700/1200/1151/1150/1155/1156 and AMD AM4/AM5 sockets. Similarly, the Thermalright Peerless Assassin also supports Intel LGA 1851/1700/1150/1151/1155/1156/1200 and AMD AM4/AM5. This extensive compatibility ensures that both coolers can fit into a wide range of systems, making them versatile options for users planning upgrades or new builds.

Aesthetic Appeal

For users who value aesthetics, the ID-COOLING FX240 PRO features an all-black layout and a unique CD pattern on the pump header, enhancing the visual appeal of any build, especially those with dark interiors. The Thermalright Peerless Assassin, on the other hand, has a more traditional appearance with a matte anodic finish and aluminum heatsink cover. While both coolers are designed to fit well within most PC cases, the ID-COOLING may attract users looking for a striking design element.

Installation Process

Ease of installation is a vital aspect for many builders, and both coolers offer straightforward installation processes. The ID-COOLING FX240 PRO uses a daisy chain connector for fans, simplifying cable management and reducing clutter. Conversely, the Thermalright Peerless Assassin comes with mounting accessories and installation instructions, making it accessible for those who may be less experienced with CPU cooler setups. However, it does require the original backplate of the motherboard for AMD installations, which could complicate matters for some users.

Cooling Technology

The cooling technology used in each product reflects their design philosophies. The ID-COOLING FX240 PRO utilizes liquid cooling technology with a powerful pump and two high-efficiency fans that deliver a maximum airflow of 82.5 CFM. This enables it to cool efficiently at high performance levels. The Thermalright Peerless Assassin relies on traditional air cooling with its six heat pipes and dual fans, offering a respectable airflow of 70.84 CFM. While air coolers can be simpler and sometimes more reliable, the liquid cooling of the FX240 PRO can provide superior cooling performance during heavy loads.

Which should you buy?

Choosing between the ID-COOLING FX240 PRO and the Thermalright Peerless Assassin ultimately depends on your specific needs and preferences. If you seek high performance, especially for gaming or overclocking, the ID-COOLING FX240 PRO, with its superior TDP and powerful cooling technology, is an excellent choice despite its higher price of $54.99. However, for users who prefer a quieter operation and a lower price point of $35.90, the Thermalright Peerless Assassin offers solid performance along with an aesthetic design that fits well in a variety of builds. Each cooler has strengths that cater to different user priorities, making either a valuable addition to a CPU cooling setup.