ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - vs Thermalrlght Peerless Assassin 120 SE 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 aesthetics, while the Thermalrlght Peerless Assassin 120 SE is a budget-friendly option. Choose based on your cooling needs and budget.
Why ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - is better
Cooling Performance
ID-COOLING has a TDP of 300W.
Aesthetics
ID-COOLING features a premium design.
Noise Levels
ID-COOLING operates quieter under load.
Why Thermalrlght Peerless Assassin 120 SE CPU Air is better
Price
Thermalrlght is approximately 40% cheaper.
Installation
Thermalrlght has a simpler installation process.
Size
Thermalrlght is more compact.
Overall score
Specifications
| Spec | ID-COOLING FX240 PRO Liquid CPU Cooler for Desktop - | Thermalrlght Peerless Assassin 120 SE CPU Air |
|---|---|---|
| Cooling Type | Liquid | Air |
| Max RPM | 2900 | 1550 |
| Airflow | 82.5 CFM | 66.17 CFM |
| TDP | 300W | unknown |
| Noise Level | low | 25.6 dB(A) |
Dimension comparison
Overview of the ID-COOLING FX240 PRO and Thermalrlght Peerless Assassin 120 SE
The ID-COOLING FX240 PRO is a premium liquid CPU cooler priced at $54.99, while the Thermalrlght Peerless Assassin 120 SE is an air cooler available for $32.90, making it about 40% cheaper. Both coolers are designed to optimize thermal management for CPUs, but they employ different cooling technologies that cater to distinct user needs and preferences.
The ID-COOLING FX240 PRO features a 240mm radiator and two high-efficient 120mm fans, providing robust performance for gaming and high-performance computing. In contrast, the Thermalrlght Peerless Assassin 120 SE utilizes a dual-tower air cooling design with six heat pipes and dual 120mm fans. This comparison will delve deeper into their cooling capabilities, design, compatibility, and overall value.
Cooling Performance
When it comes to cooling performance, the ID-COOLING FX240 PRO stands out with its TDP rating of 300W, which indicates its ability to handle high thermal loads effectively. Its pump can operate at a speed of 2900 RPM, allowing it to dissipate heat efficiently, making it especially suitable for overclocked systems.
The Thermalrlght Peerless Assassin 120 SE, on the other hand, features six heat pipes designed to enhance heat dissipation. With a maximum airflow rating of 66.17 CFM from its dual 120mm fans, it also provides solid cooling performance, although it is generally targeted towards less demanding setups compared to the ID-COOLING. While both coolers are effective, the liquid cooling solution of the ID-COOLING is likely to offer superior cooling under extreme conditions.
Design and Aesthetics
The ID-COOLING FX240 PRO showcases a sleek, all-black design that integrates well into most PC builds, especially those with dark interiors. Its unique CD pattern on the water block adds a touch of elegance, appealing to users who prioritize aesthetics alongside functionality.
Conversely, the Thermalrlght Peerless Assassin 120 SE has an anodized brushed black top cover that gives it a modern look. Its offset asymmetric layout allows for better compatibility with graphics cards and motherboards, although it may not have the same visual flair as the FX240 PRO. Both coolers are visually appealing, but the ID-COOLING may attract those looking for a more sophisticated appearance in their builds.
Installation and Compatibility
The installation processes of both coolers are relatively straightforward, but they differ in complexity. The ID-COOLING FX240 PRO is compatible with a wide range of Intel and AMD sockets, including Intel LGA1700 and AMD AM5. Its design allows for simple cable management through a daisy chain connector for the fans, reducing clutter during installation.
In contrast, the Thermalrlght Peerless Assassin 120 SE also supports various Intel and AMD sockets. However, it requires users to utilize the original motherboard's built-in backplate for installation on AM4 and AM5 systems, which adds a layer of complexity. Overall, while both coolers are compatible with contemporary CPU sockets, the ID-COOLING offers a more user-friendly installation experience.
Noise Levels
Noise levels are a critical consideration for many PC builders, especially for those who desire a quieter operating environment. The ID-COOLING FX240 PRO, due to its liquid cooling nature, generally operates at lower noise levels, making it an excellent choice for noise-sensitive users.
The Thermalrlght Peerless Assassin 120 SE, with a noise level rating of 25.6 dB(A), is also designed to operate quietly, but its fans may produce more noise under heavy load compared to the ID-COOLING. If silence is a priority, the FX240 PRO likely holds an advantage, especially during intense gaming or heavy computing tasks.
Price Comparison
The price difference between the two coolers is significant. The ID-COOLING FX240 PRO is priced at $54.99, while the Thermalrlght Peerless Assassin 120 SE is available for $32.90, making the latter approximately 40% cheaper. This lower price might attract budget-conscious consumers or those who are building less intensive systems.
However, the increased cost of the ID-COOLING cooler can be justified by its advanced cooling capabilities and aesthetics. Users need to evaluate their specific needs and whether the additional investment in the ID-COOLING is warranted based on their intended use case.
Target Audience
The ID-COOLING FX240 PRO is ideally suited for gamers and professionals who require advanced cooling solutions for high-performance systems. Its superior cooling capabilities, aesthetic appeal, and effective noise management make it a top choice for enthusiasts looking to push their systems to the limit.
On the other hand, the Thermalrlght Peerless Assassin 120 SE targets budget-conscious users who still want solid performance without breaking the bank. Its effective cooling solution is perfect for mid-range builds and less demanding applications, offering a great balance of performance and cost.
Which should you buy?
Choosing between the ID-COOLING FX240 PRO and the Thermalrlght Peerless Assassin 120 SE ultimately depends on your specific needs and budget. If you are a high-performance user requiring superior cooling for overclocked systems, the ID-COOLING FX240 PRO is likely the better option despite its higher price. However, if you are looking for an economical solution that still delivers solid performance for standard builds, the Thermalrlght Peerless Assassin 120 SE is an excellent choice. Both coolers have their merits, so consider your priorities—performance, aesthetics, and budget—before making a decision.

