ARCTIC Freezer 36 - Single-Tower CPU Cooler with vs Thermalrlght Peerless Assassin 120 SE CPU Air
Updated August 2026 — Thermalrlght Peerless Assassin 120 SE CPU Air leads on compatibility and build quality.
The ARCTIC Freezer 36 offers a cost-effective solution with easier installation, while the Thermalrlght Peerless Assassin 120 SE provides superior cooling performance for high-end CPUs.
Why ARCTIC Freezer 36 - Single-Tower CPU Cooler with is better
Price
Freezer 36 is cheaper by 7.7%
Installation
Easier click installation system
Design
Sleek black finish integrates well
Why Thermalrlght Peerless Assassin 120 SE CPU Air is better
Cooling
Dual tower design with six heat pipes
Airflow
Higher airflow rate of 66.17 CFM
Noise
Quieter operation at 25.6 dB(A)
Overall score
Specifications
| Spec | ARCTIC Freezer 36 - Single-Tower CPU Cooler with | Thermalrlght Peerless Assassin 120 SE CPU Air |
|---|---|---|
| RPM | 200-1800 | 1550 |
| Noise Level | N/A | 25.6 dB(A) |
| Compatibility | LGA1851, LGA1700 | LGA1700, AM4, AM5 |
| Fan Type | Pressure-Optimized | PWM |
| Material | Aluminum | Aluminum/Copper |
Dimension comparison
Overview of ARCTIC Freezer 36 and Thermalrlght Peerless Assassin 120 SE
The ARCTIC Freezer 36 is priced at $30.54, while the Thermalrlght Peerless Assassin 120 SE costs $32.90, making it about 7.7% more expensive. Both coolers are designed for high-performance cooling, but they employ different technologies and designs to achieve their cooling potential. The Freezer 36 features a single-tower design with push-pull fan configuration, while the Peerless Assassin 120 SE utilizes a dual tower design with six heat pipes. This comparison will explore various aspects such as compatibility, cooling performance, installation, and design features to help you determine which cooler suits your needs best.
Compatibility with CPUs
When it comes to CPU compatibility, both the ARCTIC Freezer 36 and the Thermalrlght Peerless Assassin 120 SE support a wide range of Intel and AMD sockets. The Freezer 36 is compatible with Intel LGA1851 and LGA1700, providing an effective solution for modern Intel processors. On the other hand, the Peerless Assassin supports a broader range of CPUs, including AMD AM4 and AM5, as well as Intel sockets like LGA 1700 and others. This makes the Peerless Assassin the more versatile option, accommodating a larger variety of systems. If you are planning to upgrade your CPU in the near future, the Peerless Assassin may be the better choice for long-term compatibility.
Cooling Performance
In terms of cooling performance, both the ARCTIC Freezer 36 and the Thermalrlght Peerless Assassin 120 SE are engineered to handle high-end CPUs effectively. The Freezer 36 utilizes a single-tower design with four heat pipes and pressure-optimized 120 mm fans, allowing it to dissipate heat efficiently at speeds ranging from 200 to 1800 RPM. Conversely, the Peerless Assassin offers six heat pipes and dual 120 mm PWM fans, providing a higher airflow rate of 66.17 CFM and lower noise levels of around 25.6 dB(A). While both coolers are capable, the Peerless Assassin's dual-tower design and additional heat pipes may offer superior cooling for overclocked CPUs, making it a strong contender for high-performance builds.
Design and Aesthetics
The design of CPU coolers can significantly influence the overall aesthetics of your build. The ARCTIC Freezer 36 features a sleek black finish that integrates well with most setups, while its innovative fan mounting system simplifies installation and maintenance. The Thermalrlght Peerless Assassin 120 SE stands out with its anodized brushed black top cover and a more complex design that may appeal to enthusiasts. Additionally, its offset asymmetric layout allows for better compatibility with graphics cards and motherboards, enhancing its appeal in tight spaces. If aesthetics are a priority for you, consider which cooler aligns better with your build theme.
Installation Process
Both coolers are designed with user-friendly installation in mind, but they offer different experiences. The ARCTIC Freezer 36 employs an innovative click installation system, allowing for quick and easy setup or replacement of the fans. This makes it accessible even for those who may not be as experienced with PC building. In contrast, the Thermalrlght Peerless Assassin 120 SE requires the use of the original motherboard's built-in backplate for AM4 and AM5 installations, which may complicate the process for some users. If ease of installation is a top concern, the Freezer 36 has the advantage with its streamlined design.
Noise Levels
Noise levels are an important consideration for many users, especially in quiet environments. The ARCTIC Freezer 36 operates with fans that can reach up to 1800 RPM, but the efficiency of its design helps maintain reasonable noise levels. Although specific noise ratings for the Freezer 36 are not provided, its fluid dynamic bearing fans are generally known for quieter operation. The Peerless Assassin, however, claims a maximum noise level of 25.6 dB(A) at full load, making it a quieter option at its peak performance. For users prioritizing a silent operation, the Peerless Assassin may be the better choice.
Durability and Build Quality
Both the ARCTIC Freezer 36 and the Thermalrlght Peerless Assassin 120 SE are built to last, employing quality materials to ensure long-term performance. The Freezer 36 includes a robust contact frame designed for improved pressure distribution, which aids in efficient heat transfer. Similarly, the Peerless Assassin features nickel-plated heat pipes and a durable aluminum heatsink cover, promising stable performance. Both brands emphasize quality and durability, but the choice may come down to personal preferences regarding aesthetics and brand loyalty.
Price Comparison
The ARCTIC Freezer 36 is priced at $30.54, while the Thermalrlght Peerless Assassin 120 SE is available for $32.90. This price difference makes the Freezer 36 approximately 7.7% cheaper than the Peerless Assassin. While pricing is an essential factor, it's also crucial to consider the performance and features offered by each cooler. The choice between the two may ultimately depend on whether you value the additional features of the Peerless Assassin enough to justify its higher price.
Which should you buy?
Choosing between the ARCTIC Freezer 36 and the Thermalrlght Peerless Assassin 120 SE ultimately depends on your specific needs and preferences. If you are looking for a cost-effective solution with a straightforward installation process and solid performance for standard CPUs, the Freezer 36 is an excellent choice. However, if you require superior cooling performance for high-end CPUs or overclocking and appreciate the aesthetic and functional benefits of a dual-tower design, the Peerless Assassin may be worth the extra investment. Consider your CPU compatibility, cooling demands, and installation comfort when making your decision.

