Thermalright Peerless Assassin 140 Black CPU Cooler vs Thermalright Assassin X 120R SE Plus CPU Cooler - 4×6mm Heat Pipes
Updated August 2026 — The Thermalright Peerless Assassin 140 Black offers superior cooling performance and build quality, making it the better choice for high-performance systems. However, the Assassin X 120R SE Plus is a solid budget option.
The Thermalright Peerless Assassin 140 Black offers superior cooling performance and build quality, making it the better choice for high-performance systems. However, the Assassin X 120R SE Plus is a solid budget option.
Why Thermalright Peerless Assassin 140 Black CPU Cooler is better
Cooling Performance
Higher airflow and fan speed
Build Quality
Constructed with pure copper heat pipes
Size Compatibility
Supports larger chassis and high-profile RAM
Why Thermalright Assassin X 120R SE Plus CPU Cooler - 4×6mm Heat Pipes is better
Price
More budget-friendly option
Compact Size
Ideal for smaller cases
Noise Levels
Maintains similar noise levels at lower RPM
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 140 Black CPU Cooler | Thermalright Assassin X 120R SE Plus CPU Cooler - 4×6mm Heat Pipes |
|---|---|---|
| Max RPM | 1500 | 1550 |
| Noise Level | ≤25.6 dB(A) | ≤25.6 dB(A) |
| Heat Pipes | 6 | 4 |
| Fan Type | Dual PWM | Dual PWM |
| Socket Support | Intel/AMD | Intel/AMD |
Dimension comparison
Overview of the Thermalright Peerless Assassin 140 Black
The Thermalright Peerless Assassin 140 Black CPU Cooler is designed for optimal heat dissipation and performance. Priced at C$54.90, this cooler features a twin-tower design, pure copper heat pipes, and dual high-performance fans. The combination of these elements allows the cooler to effectively manage CPU temperatures, making it suitable for users who demand high performance from their systems.
The Peerless Assassin 140 Black measures 140mm x 157mm x 158mm, which makes it a robust option for larger cases. With an impressive air volume of 66.17 CFM at a maximum fan speed of 1500 RPM, it promises to deliver efficient cooling while maintaining noise levels at a low 25.6 dB(A). This product is especially appealing for gamers and content creators looking to maintain optimal temperatures during intensive tasks.
Overview of the Thermalright Assassin X 120R SE Plus
The Thermalright Assassin X 120R SE Plus CPU Cooler offers great value at a price of C$25.59. This cooler incorporates 4×6mm heat pipes and dual PWM fans designed to provide effective cooling while keeping noise to a minimum. With a maximum airflow of 66.17 CFM and fan speeds reaching 1550 RPM, it competes well in performance despite its lower price point.
Measuring 120mm x 120mm x 25mm, the Assassin X 120R SE Plus is more compact than its counterpart, making it a better fit for smaller cases. Its design utilises advanced AGHP technology to mitigate the inverse gravity effect, ensuring reliable performance regardless of orientation. This cooler is a solid choice for budget-conscious consumers who still want dependable cooling capabilities.
Cooling Performance Comparison
When it comes to cooling performance, the Thermalright Peerless Assassin 140 Black has the upper hand thanks to its larger twin-tower design and higher fan speeds. With a maximum airflow of 66.17 CFM at 1500 RPM, it is engineered for superior heat dissipation. The dual fans also contribute to its ability to maintain lower temperatures under load, making it ideal for high-performance CPUs.
In contrast, the Thermalright Assassin X 120R SE Plus offers a maximum airflow of 66.17 CFM, but at a slightly lower fan speed of 1550 RPM for one fan and 1500 RPM for the other. While its cooling capabilities are respectable, especially considering its price, it may not be as effective as the Peerless Assassin 140 in extreme scenarios where maximum cooling performance is necessary.
Noise Levels
Both coolers are designed to operate quietly, but they do have slight variations in noise output. The Thermalright Peerless Assassin 140 Black maintains a noise level of ≤25.6 dB(A), which is quite silent and suitable for quiet PC builds. This makes it an excellent choice for gamers who value a quiet environment.
The Thermalright Assassin X 120R SE Plus also boasts similar noise levels of ≤25.6 dB(A), with efficient cooling performance while maintaining a quiet operation. However, the dual fans of the Peerless Assassin 140 may provide a more robust airflow while still remaining quiet during operation, potentially giving it an edge in noise-to-performance ratio.
Size and Compatibility
In terms of size, the Thermalright Peerless Assassin 140 Black is larger, measuring 140mm x 157mm x 158mm, making it suitable for larger chassis. This height allows for compatibility with high-profile RAM and graphics cards, which is crucial for high-end builds. Its weight and size, however, may pose challenges in smaller cases.
Conversely, the Thermalright Assassin X 120R SE Plus is more compact, measuring 120mm x 120mm x 25mm. This smaller form factor makes it ideal for tight spaces, allowing for easier installation in smaller cases. Both coolers support a wide range of Intel and AMD sockets, ensuring compatibility across various CPU types.
Build Quality and Durability
The Thermalright Peerless Assassin 140 Black is constructed with a twin-tower design and features pure copper heat pipes, which contribute to its durability and effective heat dissipation. The use of all-metal fasteners and a robust aluminum heatsink enhances its longevity, making it a solid investment for users seeking long-term performance.
On the other hand, the Thermalright Assassin X 120R SE Plus incorporates quality S-FDB bearings in its fans, designed to reduce noise and prevent blade shaking. This cooler promises up to 20,000 hours of service life due to its industrial-grade materials, making it a reliable option for users who prioritize longevity.
Price Comparison
The price difference between the two coolers is significant. The Thermalright Peerless Assassin 140 Black is priced at C$54.90, reflecting its advanced cooling capabilities and larger design. This cooler is targeted at users who are willing to invest more for enhanced performance.
In contrast, the Thermalright Assassin X 120R SE Plus is much more budget-friendly at C$25.59. This lower price point makes it an attractive option for users who need reliable cooling without breaking the bank. However, this also means that users may have to compromise on some advanced features and overall performance.
Which should you buy?
When determining which cooler to purchase, consider your specific needs and budget. The Thermalright Peerless Assassin 140 Black stands out for its superior cooling performance, larger size, and robust build quality, making it ideal for high-performance systems. However, if you are looking for a more budget-friendly option that still offers decent cooling capabilities, the Thermalright Assassin X 120R SE Plus is a commendable choice. Ultimately, your decision should hinge on what you value most—performance or price.
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