ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler vs Thermalright Peerless Assassin 120 Black CPU Air
Updated August 2026 — ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler wins on installation, Thermalright Peerless Assassin 120 Black CPU Air wins on cooling and compatibility.
The ARCTIC Freezer 36 A-RGB offers better aesthetics and easier installation, while the Thermalright Peerless Assassin 120 Black excels in cooling performance and compatibility.
Why ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler is better
Aesthetics
ARCTIC has RGB lighting
Installation
ARCTIC features an innovative click installation system
Price
ARCTIC is $3.10 cheaper
Why Thermalright Peerless Assassin 120 Black CPU Air is better
Cooling
Thermalright has a double-tower design with 6 heat pipes
Noise Level
Thermalright operates at a lower noise level
Compatibility
Thermalright supports more CPU sockets
Overall score
Specifications
| Spec | ARCTIC Freezer 36 A-RGB - Single-Tower CPU Cooler | Thermalright Peerless Assassin 120 Black CPU Air |
|---|---|---|
| Max RPM | 2000 | 1500 |
| Noise Level | ≤30 dB(A) | ≤25.6 dB(A) |
| Socket Support | LGA1851, LGA1700 | LGA1700, AM4/AM5 |
| Cooling Type | Single-Tower | Double-Tower |
| RGB Lighting | Yes | No |
Dimension comparison
Overview of ARCTIC Freezer 36 A-RGB and Thermalright Peerless Assassin 120 Black
The ARCTIC Freezer 36 A-RGB is priced at $35.80, while the Thermalright Peerless Assassin 120 Black comes in at $38.90, making the ARCTIC model about 8% cheaper. Both CPU coolers are designed to handle high-performance CPUs, but they feature different technologies and designs that cater to varying preferences and needs in cooling efficiency and aesthetics.
Performance: Cooling Efficiency
The ARCTIC Freezer 36 A-RGB boasts a single-tower design equipped with four heat pipes, optimizing heat transfer from the CPU to the heatsink. In contrast, the Thermalright Peerless Assassin 120 Black features a robust double-tower configuration with six heat pipes, which significantly enhances its cooling capabilities. The ARCTIC model can handle high-end CPUs effectively, but the additional heat pipes in the Thermalright cooler suggest it may offer superior performance, especially under heavy loads.
Fan Technology and Noise Levels
Both coolers utilize advanced fan technology, but their fan configurations differ. The ARCTIC Freezer 36 A-RGB includes two pressure-optimized 120 mm fans that operate at a speed range of 200 to 2000 RPM, providing a versatile cooling range while maintaining efficient airflow. The Thermalright Peerless Assassin 120 Black, on the other hand, is equipped with two PWM fans that max out at 1500 RPM, ensuring quieter operation with a noise level of ≤25.6 dB(A). While the ARCTIC model offers a wider RPM range, the Thermalright cooler’s design focuses on silent operation.
Aesthetics and Lighting Features
The ARCTIC Freezer 36 A-RGB stands out with its digital A-RGB lighting feature, which includes 12 A-RGB LEDs that enhance the visual appeal of a gaming setup. Its fan hub and transparent rotor design contribute to a vibrant and even illumination. The Thermalright Peerless Assassin 120 Black, while lacking extensive RGB lighting, presents a sleek black aesthetic with an aluminium heatsink cover that may appeal to users who prefer a more understated look. If RGB lighting is a priority, the ARCTIC model is the clear winner.
Installation Process
The ARCTIC Freezer 36 A-RGB incorporates an innovative click installation system that simplifies the installation process, making it easier to replace fans or install the cooler itself. This feature can be particularly beneficial for users who may not be very experienced with CPU cooler installations. Conversely, the Thermalright Peerless Assassin 120 Black offers a more traditional installation method but provides metal fasteners for both Intel and AMD platforms. While both coolers are designed for compatibility, the ARCTIC model's user-friendly installation may be a deciding factor for some.
Compatibility with CPU Sockets
When it comes to compatibility, both coolers support a range of CPU sockets. The ARCTIC Freezer 36 A-RGB is compatible with Intel LGA1851 and LGA1700 sockets, while the Thermalright Peerless Assassin 120 Black supports a wider array of sockets including Intel LGA1700/115X/2066 and AMD AM4/AM5. This broader compatibility makes the Thermalright option more versatile for users with different CPU setups, potentially appealing to a larger audience.
Price Comparison
The price difference between the two coolers is notable, with the ARCTIC Freezer 36 A-RGB priced at $35.80 and the Thermalright Peerless Assassin 120 Black at $38.90. This means that the ARCTIC cooler is approximately $3.10 less expensive, translating to about a 8% difference. While both coolers offer excellent features for their price points, the ARCTIC model presents a more budget-friendly option without sacrificing performance for most users.
Which should you buy?
Choosing between the ARCTIC Freezer 36 A-RGB and the Thermalright Peerless Assassin 120 Black largely depends on your specific needs and preferences. If you favor aesthetics with RGB lighting and an easier installation process at a slightly lower price, the ARCTIC Freezer 36 A-RGB is an excellent choice. However, if you require superior cooling performance, compatibility with a wider range of CPU sockets, and a focus on quieter operation, the Thermalright Peerless Assassin 120 Black may be worth the extra investment. Ultimately, both coolers represent solid options in the CPU cooler market, catering to different user priorities.

