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Thermalright AXP90 X36 Low Profile ITX CPU Cooler, vs Thermalright Peerless Assassin 120 Black CPU Air

Updated August 2026 — Thermalright AXP90 X36 Low Profile ITX CPU Cooler, wins on size and noise level, Thermalright Peerless Assassin 120 Black CPU Air wins on cooling and compatibility.

The Thermalright AXP90 X36 is a great choice for compact builds, while the Peerless Assassin 120 Black excels in cooling performance. Choose based on your specific needs.

Why Thermalright AXP90 X36 Low Profile ITX CPU Cooler, is better

Price

AXP90 X36 is $20.39, significantly cheaper than Peerless Assassin 120 Black at $38.90.

Size

AXP90 X36 has a low-profile design at 36mm, ideal for compact cases.

Noise Level

AXP90 X36 operates at a quieter 22.4 DBA compared to 25.6 DBA of Peerless Assassin.

Why Thermalright Peerless Assassin 120 Black CPU Air is better

Cooling Performance

Peerless Assassin 120 Black has a TDP capacity of 245W, outperforming AXP90 X36.

Airflow

Peerless Assassin 120 Black provides up to 66.17 CFM airflow, better than AXP90 X36.

Heat Pipes

Peerless Assassin 120 Black features six heat pipes, compared to four in AXP90 X36.

Overall score

Thermalright AXP90 X36 Low Profile ITX CPU Cooler,
75
Thermalright Peerless Assassin 120 Black CPU Air
85

Specifications

SpecThermalright AXP90 X36 Low Profile ITX CPU Cooler,Thermalright Peerless Assassin 120 Black CPU Air
Price$20.39$38.90
Noise Level22.4 DBA25.6 DBA
TDPUnknown245W
AirflowUnknown66.17 CFM
CompatibilityIntel: 115X/1200; AMD: AM4/AM5Intel: LGA1150-2066; AMD: AM4/AM5

Dimension comparison

Thermalright AXP90 X36 Low Profile ITX CPU Cooler,Thermalright Peerless Assassin 120 Black CPU Air

Overview of the Thermalright AXP90 X36 and Thermalright Peerless Assassin 120 Black

When it comes to CPU coolers, the Thermalright AXP90 X36 and the Thermalright Peerless Assassin 120 Black present two distinct options catering to different needs. The AXP90 X36 is priced at $20.39, while the Peerless Assassin 120 Black comes in at $38.90, making the AXP90 about 47% cheaper. This price difference reflects their respective designs and intended applications, influencing which cooler might be the better fit for your setup.

Design and Build Quality

The AXP90 X36 features a low-profile design with a total height of just 36mm, making it ideal for compact builds. It utilizes a premium-quality all-metal platform and a nickel plating process that enhances its corrosion resistance. In contrast, the Peerless Assassin 120 Black boasts a more robust dual-tower design, standing at 157mm tall, and incorporates a sleek black finish with aluminum heatsink covers. This difference in design not only affects aesthetics but also the thermal performance and compatibility with various cases.

Cooling Performance

In terms of cooling efficiency, the Peerless Assassin 120 Black is designed for superior heat dissipation with its six heat pipes and dual PWM fans, allowing for an air flow of up to 66.17 CFM. This results in a TDP capacity of 245W, making it suitable for high-performance CPUs. The AXP90 X36, while compact, utilizes four 6mm heat pipes and operates quietly at a noise level of 22.4 DBA, making it a solid choice for users prioritizing low noise in smaller setups. However, for tasks demanding more cooling power, the Peerless Assassin 120 Black has a clear advantage.

Compatibility

Compatibility is another critical factor when choosing between the two coolers. The AXP90 X36 supports a range of Intel sockets, including LGA1150, 1151, 1200, and 1700, as well as AMD’s AM4 and AM5 platforms. Similarly, the Peerless Assassin 120 Black supports a wide variety of sockets, including Intel’s LGA1150 to 2066 and AMD’s AM4 and AM5. While both coolers provide compatibility for mainstream CPUs, the AXP90 X36's low-profile design makes it particularly suitable for ITX cases where space is a premium.

Noise Levels

Noise levels play a crucial role in user experience, especially for those who prioritize quiet operation. The AXP90 X36 operates at a maximum noise level of 22.4 DBA, which is relatively quiet and ideal for users who need a silent cooling solution. On the other hand, the Peerless Assassin 120 Black has a slightly higher noise level of 25.6 DBA due to its more powerful fans designed for increased airflow. Therefore, if a silent operation is your key concern, the AXP90 X36 may be the better choice.

Installation Process

The installation process can greatly influence user satisfaction. The AXP90 X36 is equipped with a simple back plate fastener and is designed for straightforward installation, making it friendly for users less experienced with PC builds. The Peerless Assassin 120 Black, however, includes metal fasteners that ensure a secure fit across various platforms but may require more effort during installation due to its larger size and dual-tower design. Thus, while both provide compatibility, the AXP90 X36 is generally easier to install, especially in compact builds.

Target Audience

The intended audience for these coolers differs significantly. The AXP90 X36 is targeted towards users building compact ITX systems or those looking to save space without sacrificing too much cooling performance. Conversely, the Peerless Assassin 120 Black is tailored for gamers and content creators who require enhanced cooling capabilities for high-performance CPUs. This distinction helps users choose a cooler that aligns with their specific needs and performance expectations.

Which should you buy?

In conclusion, the choice between the Thermalright AXP90 X36 and the Thermalright Peerless Assassin 120 Black ultimately hinges on your specific requirements. If you are looking for a cost-effective solution for a compact build, the AXP90 X36 at $20.39 is an excellent choice due to its low profile and quiet operation. However, if you seek superior cooling performance for demanding applications and are willing to invest more at $38.90, the Peerless Assassin 120 Black offers enhanced features and capabilities. Each cooler serves its purpose well, making the decision dependent on your individual cooling needs and build specifications.