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Thermalright AXP90-X53 Full Cooper Low Profile CPU vs Thermalright Peerless Assassin 120 Black CPU Air

Updated August 2026 — Thermalright AXP90-X53 Full Cooper Low Profile CPU wins on noise level, Thermalright Peerless Assassin 120 Black CPU Air wins on cooling and design.

The Thermalright Peerless Assassin 120 Black offers superior cooling performance and compatibility, while the AXP90-X53 excels in compact builds and quiet operation.

Why Thermalright AXP90-X53 Full Cooper Low Profile CPU is better

Price

AXP90-X53 is cheaper at $35.90

Size

AXP90-X53 is more suitable for compact builds

Noise

AXP90-X53 operates quieter at 22.4 dB

Why Thermalright Peerless Assassin 120 Black CPU Air is better

Cooling

Peerless Assassin has higher airflow at 66.17 CFM

Compatibility

Peerless Assassin supports more CPU sockets

Build Quality

Peerless Assassin has a dual-fan design for better cooling

Overall score

Thermalright AXP90-X53 Full Cooper Low Profile CPU
75
Thermalright Peerless Assassin 120 Black CPU Air
85

Specifications

SpecThermalright AXP90-X53 Full Cooper Low Profile CPUThermalright Peerless Assassin 120 Black CPU Air
Price$35.90$38.90
Heat Pipes46
Noise Level22.4 dB25.6 dB
TDPN/A245W
Fan RPM27001500

Dimension comparison

Thermalright AXP90-X53 Full Cooper Low Profile CPUThermalright Peerless Assassin 120 Black CPU Air

Price Comparison

The Thermalright AXP90-X53 is priced at $35.90, making it about 8% cheaper than the Thermalright Peerless Assassin 120 Black, which retails for $38.90. This price difference may influence budget-conscious consumers looking for effective cooling solutions. The AXP90-X53 offers a solid alternative for those who need a capable low-profile cooler without breaking the bank. The Peerless Assassin, while slightly more expensive, boasts additional features that may justify its higher price for users seeking enhanced cooling performance.

Cooling Performance

When it comes to cooling performance, the Thermalright Peerless Assassin 120 Black stands out with its dual-fan design and six heat pipes. It has a maximum air flow of 66.17 CFM, which is significantly higher than the 42.58 CFM of the AXP90-X53. This increase in air flow can lead to more effective heat dissipation, especially during intense gaming or heavy computing tasks. The AXP90-X53, while effective for its size, may not provide the same level of cooling performance as the larger Peerless Assassin, making it potentially less suitable for high-TDP CPUs.

Size and Compatibility

The AXP90-X53 is designed with a compact height of just 53mm, making it an excellent choice for small form factor builds like HTPCs or ITX systems. Its dimensions allow it to fit in tighter spaces without interfering with RAM clearance. In contrast, the Peerless Assassin 120 Black measures 157mm in height, which may limit its compatibility in smaller cases. However, the Peerless Assassin supports a broader range of sockets, including Intel's LGA 2066 and 2011, making it a versatile option for various builds. Users with space constraints may find the AXP90-X53 to be more suitable, while those looking for extensive compatibility might lean towards the Peerless Assassin.

Noise Levels

In terms of noise levels, the AXP90-X53 operates at a maximum of 22.4 dB, which is relatively quiet for a CPU cooler. This is particularly beneficial for users who prioritize a silent computing experience. On the other hand, the Peerless Assassin has a maximum noise level of 25.6 dB, which is still acceptable but may be noticeable in quieter environments. The AXP90-X53's quieter operation makes it an appealing choice for users looking to build a silent PC, while the Peerless Assassin's slightly higher noise level may be a trade-off for its enhanced cooling performance.

Installation Process

Both coolers are designed with user-friendly installation in mind, featuring accompanying mounting hardware for various CPU sockets. The AXP90-X53 includes installation instructions and video support, ensuring a smooth setup process. However, it may require adjustments if the backplane conflicts with motherboard components. The Peerless Assassin also comes with metal fasteners for both Intel and AMD platforms, streamlining the installation process. Users who are less experienced with PC building may find the AXP90-X53's low-profile design easier to manage, while the Peerless Assassin's slightly more complex installation could be a consideration for those less confident in their skills.

Build Quality and Materials

The AXP90-X53 features a pure copper base and heatsink, enhancing its heat dissipation efficiency and oxidation resistance. This choice of material aligns with its focus on performance in a low-profile design. In contrast, the Peerless Assassin 120 Black utilizes an aluminum heatsink, which is still effective but may not match the thermal conductivity of copper. While both coolers exhibit solid build quality, the AXP90-X53's materials may appeal more to users looking for durability and effective thermal management, whereas the Peerless Assassin's design is aimed at maximizing cooling surface area and airflow.

Aesthetic Appeal

Aesthetically, the Peerless Assassin 120 Black features a sleek black design that can complement a variety of builds, particularly those emphasizing a modern or stealthy look. Its dual towers and PWM fans add to its visual appeal, making it an attractive option for users who value aesthetics alongside performance. The AXP90-X53, while functional, does not have the same visual impact due to its straightforward low-profile design. Users who prioritize the look of their build might prefer the Peerless Assassin, while those seeking a more utilitarian appearance may favor the AXP90-X53.

Which should you buy?

Choosing between the Thermalright AXP90-X53 and the Thermalright Peerless Assassin 120 Black largely depends on your specific needs. If you're looking for a budget-friendly, low-profile cooler that excels in compact builds and operates quietly, the AXP90-X53 is a solid choice at $35.90. However, if you prioritize superior cooling performance, broader compatibility, and an attractive design, the Peerless Assassin at $38.90 may be worth the extra investment. Ultimately, your decision should hinge on your specific use case, aesthetic preferences, and budget constraints.