ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler vs Thermalrlght Peerless Assassin 120 SE CPU Air
Updated August 2026 — ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler wins on aesthetics and cooling performa, Thermalrlght Peerless Assassin 120 SE CPU Air wins on compatibility.
The ARCTIC Freezer 36 A-RGB offers superior aesthetics and performance, while the Thermalrlght Peerless Assassin 120 SE provides better compatibility and quieter operation. Overall, the ARCTIC cooler is the better choice for those prioritizing features.
Why ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler is better
Cooling Performance
ARCTIC has a wider RPM range for dynamic cooling.
Aesthetics
ARCTIC features vibrant ARGB lighting.
Thermal Compound
ARCTIC includes high-performance MX-6 thermal compound.
Why Thermalrlght Peerless Assassin 120 SE CPU Air is better
Compatibility
Thermalrlght supports more CPU sockets.
Noise Levels
Thermalrlght operates quieter at max speed.
Price
Thermalrlght is more budget-friendly.
Overall score
Specifications
| Spec | ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler | Thermalrlght Peerless Assassin 120 SE CPU Air |
|---|---|---|
| Max RPM | 2000 | 1550 |
| Noise Level | N/A | 25.6 dB(A) |
| Socket Support | LGA1851, LGA1700 | LGA1150/1151/1155/1156/1200/1700, AM4/AM5 |
| Fan Type | Pressure-optimised | High-performance |
| Thermal Compound | MX-6 | Not specified |
Dimension comparison
Overview of the ARCTIC Freezer 36 A-RGB and Thermalrlght Peerless Assassin 120 SE
When comparing the ARCTIC Freezer 36 A-RGB and the Thermalrlght Peerless Assassin 120 SE, both CPU coolers offer unique features aimed at enhancing performance and aesthetics. The ARCTIC Freezer 36 A-RGB is priced at $35.80, while the Thermalrlght Peerless Assassin 120 SE is slightly cheaper at $32.90, making it about 8% less expensive. Both coolers are designed to cater to high-performance CPUs, but their technologies and designs differ significantly.
Cooling Performance
In terms of cooling performance, the ARCTIC Freezer 36 A-RGB is equipped with four heat pipes and pressure-optimised 120 mm fans, enabling effective heat dissipation. The fans operate from 200 to 2000 RPM, which allows for dynamic cooling based on the CPU workload. On the other hand, the Thermalrlght Peerless Assassin 120 SE features six heat pipes and dual 120 mm high-performance fans that operate at a maximum speed of 1550 RPM. While the ARCTIC cooler has a wider RPM range, the Thermalrlght's six heat pipes offer better thermal transfer capabilities, making it a strong contender in heat dissipation.
Design and Aesthetics
The ARCTIC Freezer 36 A-RGB stands out with its digital ARGB lighting, featuring 12 A-RGB LEDs for a vibrant visual appeal. This cooler also employs a side-flow heat sink design that enhances airflow through the case, optimizing cooling efficiency and aesthetics simultaneously. Conversely, the Thermalrlght Peerless Assassin 120 SE has a more utilitarian design with an anodized brushed black top cover, offering a sleek look without RGB elements. While the ARCTIC cooler leans towards a more flashy style, the Thermalrlght focuses on a professional appearance, appealing to different user preferences.
Installation Ease
Both coolers are designed for user-friendly installation, but they employ different systems. The ARCTIC Freezer 36 A-RGB features an innovative click installation system, simplifying the mounting process and making it compatible with most 120 mm fans. The Thermalrlght Peerless Assassin 120 SE uses an SS2 install system with a metal pressure plate, ensuring better contact with the CPU. This system is slightly more complex but offers a robust installation for serious builders. In terms of ease, the ARCTIC cooler may appeal more to beginners, whereas the Thermalrlght cooler may attract experienced users.
Compatibility
The ARCTIC Freezer 36 A-RGB is designed to support Intel LGA1851 and LGA1700 sockets, ensuring compatibility with the latest Intel processors. On the other hand, the Thermalrlght Peerless Assassin 120 SE offers a broader compatibility range, supporting various Intel sockets (LGA1150/1151/1155/1156/1200/1700) and AMD sockets (AM4/AM5). This versatility makes the Thermalrlght cooler more adaptable for users with different CPU platforms, whereas the ARCTIC cooler is limited to specific Intel models.
Noise Levels
Noise levels are an important factor when considering CPU coolers. The ARCTIC Freezer 36 A-RGB operates at varying speeds from 200 to 2000 RPM, which means it can be quieter during low-load situations. However, specific noise level ratings are not provided. In contrast, the Thermalrlght Peerless Assassin 120 SE has a rated noise level of 25.6 dB(A) at maximum fan speed. This lower noise rating suggests that the Thermalrlght cooler may operate more quietly under load compared to the ARCTIC cooler, making it a potentially better choice for noise-sensitive setups.
Thermal Compound
Both coolers come with thermal compounds included, which are essential for optimal heat transfer. The ARCTIC Freezer 36 A-RGB includes MX-6 thermal compound, known for its high performance and reliability. The Thermalrlght Peerless Assassin 120 SE does not specify a thermal compound, but it features a well-designed heatsink configuration that enhances thermal contact. While both coolers aim for effective heat transfer, the inclusion of a known quality thermal compound with the ARCTIC cooler may give it an edge in this aspect.
Price Comparison
At a price of $35.80, the ARCTIC Freezer 36 A-RGB is slightly more expensive than the Thermalrlght Peerless Assassin 120 SE, which retails for $32.90. This means that the ARCTIC cooler is about 8% pricier. This price difference may be justified by the ARGB lighting and the specific features offered, but for budget-conscious consumers, the Thermalrlght option remains a more economical choice without sacrificing essential performance.
Which should you buy?
Choosing between the ARCTIC Freezer 36 A-RGB and the Thermalrlght Peerless Assassin 120 SE ultimately depends on your specific needs and preferences. If you prioritize aesthetics and the latest Intel compatibility, the ARCTIC cooler is a solid choice with its impressive ARGB lighting and cooling performance. However, if you seek better compatibility across platforms, quieter operation, and a more budget-friendly option, the Thermalrlght Peerless Assassin 120 SE stands out as a robust alternative.

