Thermalright Assassin X 120R SE V2 CPU Air Cooler vs Noctua NM-i17xx-MP78
Updated August 2026 — The Thermalright Assassin X 120R SE V2 is the superior choice for cooling performance, while the Noctua NM-i17xx-MP78 is an excellent upgrade kit for existing Noctua coolers.
The Thermalright Assassin X 120R SE V2 is the superior choice for cooling performance, while the Noctua NM-i17xx-MP78 is an excellent upgrade kit for existing Noctua coolers.
Why Thermalright Assassin X 120R SE V2 CPU Air Cooler is better
Cooling Performance
Thermalright offers a fan speed of 1550 RPM and airflow of 66.17 CFM.
Compatibility
Supports multiple Intel and AMD sockets.
Durability
Features S-FDB bearings with a service life of up to 20,000 hours.
Why Noctua NM-i17xx-MP78 is better
Price
Noctua is more budget-friendly at C$12.95.
Installation
Designed specifically for LGA1851 and LGA1700 sockets.
Noise Level
Noctua does not produce noise as it is not a cooling unit.
Overall score
Specifications
| Spec | Thermalright Assassin X 120R SE V2 CPU Air Cooler | Noctua NM-i17xx-MP78 |
|---|---|---|
| Brand | Thermalright | Noctua |
| Current Price | C$23.59 | C$12.95 |
| Cooling Type | Air Cooler | Mounting Kit |
| Fan Size | 120mm | N/A |
| Mounting Compatibility | Multiple | LGA1851/1700 |
Dimension comparison
Overview of Thermalright Assassin X 120R SE V2 and Noctua NM-i17xx-MP78
The Thermalright Assassin X 120R SE V2 is a CPU air cooler designed for effective heat dissipation, while the Noctua NM-i17xx-MP78 is a mounting upgrade kit for Noctua CPU coolers. With prices of C$23.59 and C$12.95 respectively, they cater to different needs within the CPU cooling market. The Thermalright model focuses on delivering cooling performance, while the Noctua product enhances compatibility and installation options for existing coolers.
Cooling Performance
The Thermalright Assassin X 120R SE V2 boasts a fan speed of up to 1550 RPM and can achieve an airflow of 66.17 CFM, making it a strong contender in cooling efficiency. Its noise level is rated at a maximum of 25.6 dB(A), which is fairly quiet for an air cooler. In contrast, the Noctua NM-i17xx-MP78 does not provide cooling performance on its own but allows users to install Noctua coolers on newer Intel sockets. Therefore, if you're seeking cooling performance, the Thermalright is the clear choice.
Compatibility and Installation
The Thermalright Assassin X 120R SE V2 is compatible with a variety of Intel and AMD socket types, including LGA1150, LGA1151, LGA1200, LGA1700, AM4, and AM5, offering flexibility for different builds. The installation process is simplified with a provided mounting plate and instructions. On the other hand, the Noctua NM-i17xx-MP78 is specifically designed for LGA1851 and LGA1700 sockets, providing a reliable mounting upgrade for existing Noctua coolers. This targeted compatibility makes it an excellent choice for users with Noctua coolers looking to upgrade their system.
Build Quality and Durability
The Thermalright cooler features 4×6mm heat pipes employing AGHP technology to prevent the inverse gravity effect in both vertical and horizontal orientations. The use of S-FDB bearings ensures a service life of up to 20,000 hours, highlighting its durability. In comparison, the Noctua NM-i17xx-MP78 is built with a dedicated one-piece backplate that ensures optimal contact pressure and reliability during installation. While both products are developed with durability in mind, the Thermalright offers a more comprehensive solution with built-in cooling capabilities.
Noise Levels
The Thermalright Assassin X 120R SE V2 maintains a noise level of ≤25.6 dB(A) at maximum operation, which is relatively quiet and suitable for environments where noise can be a concern. The Noctua NM-i17xx-MP78 does not produce noise, as it is not a cooling unit itself. Instead, it focuses on enhancing the installation of existing Noctua coolers, which may vary in noise levels depending on the specific model used. Thus, if noise reduction is a priority, the Thermalright provides a specific rating for users to consider.
Brand Reputation
Thermalright has a solid reputation in the CPU cooling market, backed by over 20 years of experience in developing computer accessories. Their focus on research and development in cooling technology positions them as a reliable brand. Noctua, known for its high-quality cooling solutions, also has a strong following, particularly among enthusiasts who appreciate their engineering and performance. Both brands carry significant market influence, making customer trust in either product a crucial factor.
Pricing and Value
The Thermalright Assassin X 120R SE V2 is priced at C$23.59, while the Noctua NM-i17xx-MP78 is more budget-friendly at C$12.95. While the Thermalright offers comprehensive cooling capabilities, the Noctua serves as an upgrade kit rather than a standalone cooler. Depending on your needs, the price difference may reflect the value offered. If you require a complete cooling solution, the Thermalright provides better value; however, for users who already own compatible Noctua coolers, the NM-i17xx-MP78 is an economical choice.
Which should you buy?
Ultimately, the decision between the Thermalright Assassin X 120R SE V2 and the Noctua NM-i17xx-MP78 will depend on your specific needs. If you are looking for an effective and reliable air cooler that provides substantial cooling performance, the Thermalright is the better option. Conversely, if you already own a Noctua cooler and need to upgrade your socket compatibility without the need for a complete cooler, the Noctua NM-i17xx-MP78 will serve you well. Each product has its unique advantages, so choose based on your cooling requirements and existing setup.
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