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Noctua NM-i17xx-MP78 vs Thermalright Assassin X 120 SE CPU Air Cooler

Updated August 2026The Noctua NM-i17xx-MP78 is an economical choice for mounting upgrades, while the Thermalright Assassin X 120 SE offers robust cooling performance. Choose based on your specific needs.

The Noctua NM-i17xx-MP78 is an economical choice for mounting upgrades, while the Thermalright Assassin X 120 SE offers robust cooling performance. Choose based on your specific needs.

Why Noctua NM-i17xx-MP78 is better

price

Noctua NM-i17xx-MP78 is cheaper at C$12.95

installation

Simpler installation process with dedicated backplate

brand reputation

Noctua is known for high-quality components

Why Thermalright Assassin X 120 SE CPU Air Cooler is better

cooling performance

Thermalright Assassin X 120 SE has a TDP of 125 to 225W

compatibility

Supports multiple Intel and AMD sockets

noise level

Operates at a maximum of 25.6 dB(A) for quiet performance

Overall score

Noctua NM-i17xx-MP78
70
Thermalright Assassin X 120 SE CPU Air Cooler
85

Specifications

SpecNoctua NM-i17xx-MP78Thermalright Assassin X 120 SE CPU Air Cooler
PriceC$12.95C$25.59
Socket SupportLGA1851/1700115X/1200/1700/AM4
TDP RatingN/A125 to 225W
Fan SpeedN/A1550 RPM
Noise LevelN/A25.6 dB(A)

Dimension comparison

Noctua NM-i17xx-MP78Thermalright Assassin X 120 SE CPU Air Cooler

Overview of Noctua NM-i17xx-MP78 and Thermalright Assassin X 120 SE

The Noctua NM-i17xx-MP78 is a mounting upgrade kit designed for specific Noctua CPU coolers, while the Thermalright Assassin X 120 SE is a fully-fledged air cooler. Priced at C$12.95, the Noctua model is significantly more affordable compared to the Thermalright, which retails for C$25.59. This price difference reflects their distinct functionalities, with the Noctua kit focusing on compatibility and installation ease, whereas the Thermalright cooler offers comprehensive cooling capabilities.

Design and Compatibility

The Noctua NM-i17xx-MP78 is specifically tailored for Intel’s LGA1851 and LGA1700 sockets, making it a targeted solution for users upgrading their CPU coolers. Its dedicated one-piece backplate ensures optimal contact pressure and a straightforward installation process. In contrast, the Thermalright Assassin X 120 SE supports a wider range of sockets including Intel’s 115X, 1200, 1700, and AMD’s AM4. This versatility makes it suitable for a broader audience, appealing to both Intel and AMD users.

Performance and Cooling Efficiency

When comparing performance, the Thermalright Assassin X 120 SE has a TDP rating of 125 to 225W, indicating its capability to handle a wide range of CPU heat outputs. Its design incorporates four 6mm heat pipes and a standard PWM fan that operates at a maximum speed of 1550 RPM, achieving an airflow of 66.17 CFM while maintaining a noise level of only 25.6 dB(A). The Noctua NM-i17xx-MP78, while not a cooler itself, enables the installation of compatible coolers, emphasizing reliability and ease of use rather than raw cooling performance.

Installation and Ease of Use

The Noctua NM-i17xx-MP78 prides itself on its straightforward installation process, featuring a tailor-made backplate and fixed struts to ensure optimal mounting. This is particularly advantageous for users who prefer a hassle-free setup. On the other hand, the Thermalright Assassin X 120 SE, while also designed for easy installation, is slightly more complex due to its multiple compatibility options and the need for mounting plates or fasteners for different CPU socket types. Although it is manageable, it does require a bit more attention during setup.

Brand Reputation and Reliability

Noctua is renowned for its high-quality components and has built a solid reputation for reliability in the cooling market. The NM-i17xx-MP78 exemplifies this with its focus on compatibility and ease of installation, ensuring that users can trust the performance of their Noctua coolers. Thermalright, with over 20 years of experience, also holds a strong position in the market, particularly in the player segment. Their Assassin X 120 SE boasts advanced technology, including S-FDB bearings for enhanced longevity, adding to its reliability appeal.

Noise Levels

Noise is a critical factor for many PC builders, and both products cater to users looking for quiet operation. The Thermalright Assassin X 120 SE achieves a noise level of up to 25.6 dB(A) at full fan speed, ensuring efficient cooling without excessive noise. The Noctua NM-i17xx-MP78 does not produce noise itself but allows for the installation of coolers that are designed for low-noise operation, aligning with Noctua's reputation for quiet performance. Users seeking a silent computing experience will find both options appealing, albeit in different ways.

Cost-Effectiveness

In terms of pricing, the Noctua NM-i17xx-MP78 at C$12.95 is a cost-effective choice for users who already own compatible Noctua coolers and are looking to upgrade their mounting system. Its affordability makes it an attractive option for budget-conscious builders. Conversely, the Thermalright Assassin X 120 SE, priced at C$25.59, represents a larger investment but offers comprehensive cooling capabilities and broader compatibility. Ultimately, the choice between the two will depend largely on whether the user needs a mounting upgrade or a complete cooling solution.

Which should you buy?

Choosing between the Noctua NM-i17xx-MP78 and the Thermalright Assassin X 120 SE largely depends on your specific needs. If you're looking for an economical mounting upgrade for an existing Noctua cooler and have compatible Intel processors, the Noctua NM-i17xx-MP78 is the clear winner. However, if you require a standalone, versatile air cooler with robust performance and compatibility across multiple platforms, the Thermalright Assassin X 120 SE is worth the investment. Both options offer reliability and effectiveness in their respective roles, making either a solid choice depending on your requirements.

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Noctua NM-i17xx-MP78 vs Thermalright Assassin X 120 SE CPU Air Cooler | versusfinder