Noctua NH-L9i-17xx vs Noctua NM-i17xx-MP78
Updated August 2026 — The Noctua NH-L9i-17xx is the superior choice for a complete cooling solution, while the NM-i17xx-MP78 is an excellent budget-friendly mounting kit.
The Noctua NH-L9i-17xx is the superior choice for a complete cooling solution, while the NM-i17xx-MP78 is an excellent budget-friendly mounting kit.
Why Noctua NH-L9i-17xx is better
Cooling Performance
NH-L9i-17xx provides active cooling, while NM-i17xx-MP78 does not.
Warranty
NH-L9i-17xx has a 6-year warranty, NM-i17xx-MP78 does not specify.
Noise Level
NH-L9i-17xx operates quietly, NM-i17xx-MP78 has no noise performance.
Why Noctua NM-i17xx-MP78 is better
Price
NM-i17xx-MP78 is significantly cheaper at C$12.95.
Installation Flexibility
NM-i17xx-MP78 allows cooler installation at a 90° angle.
Compatibility
NM-i17xx-MP78 enhances usability of existing coolers.
Overall score
Specifications
| Spec | Noctua NH-L9i-17xx | Noctua NM-i17xx-MP78 |
|---|---|---|
| Brand | Noctua | Noctua |
| Type | CPU Cooler | Mounting Kit |
| Compatibility | LGA1851, LGA1700 | LGA1851, LGA1700 |
| Fan Included | Yes | No |
| Installation Ease | Easy | Easy |
Dimension comparison
Overview of the Products
In this comparison, we will look at the Noctua NH-L9i-17xx and the Noctua NM-i17xx-MP78. The NH-L9i-17xx is a premium CPU cooler priced at C$59.95, while the NM-i17xx-MP78 is a mounting upgrade kit available for C$12.95. While they belong to the same brand, their functions and applications differ significantly, catering to various needs in the realm of CPU cooling.
Design and Build Quality
The Noctua NH-L9i-17xx boasts a compact design with a height of only 37mm, making it suitable for Small Form Factor (SFF) cases. This design allows it to maintain 100% RAM and PCIe compatibility across various motherboards. In contrast, the NM-i17xx-MP78 is focused on functionality as a mounting kit. It features a tailor-made backplate with fixed struts that ensure optimal contact pressure and reliable installation. While the NH-L9i-17xx is a fully functional cooler, the NM-i17xx-MP78 serves as an essential accessory for users who already own compatible Noctua coolers.
Cooling Performance
The NH-L9i-17xx is designed for optimal cooling performance, featuring the renowned NF-A9x14 slim 92mm fan that operates quietly, particularly at idle. The cooler is engineered for moderate heat loads, making it an excellent choice for Intel Core and Core Ultra processors. On the other hand, the NM-i17xx-MP78 does not provide cooling performance itself; rather, it facilitates the installation of other Noctua coolers on Intel’s LGA1851 and LGA1700 sockets. Thus, if you are looking for active cooling, the NH-L9i-17xx is the clear choice.
Compatibility
The NH-L9i-17xx is compatible with both Intel LGA1851 and LGA1700 platforms, ensuring that it will fit a wide range of modern Intel motherboards. It is specifically tailored to work with various ITX, Micro-ATX, and ATX motherboards, which adds to its versatility. The NM-i17xx-MP78, while not a cooler itself, enables the use of compatible Noctua CPU coolers on the same sockets. Hence, if you already have a Noctua cooler, this mounting kit enhances its usability with the latest Intel processors.
Installation Process
Installation of the NH-L9i-17xx is straightforward, thanks to its included SecuFirm2 mounting system and high-end NT-H1 thermal paste. This ease of installation makes it accessible for users who may not have extensive experience with CPU coolers. Conversely, the NM-i17xx-MP78 is designed for easy installation as well, with a focus on straightforward setup for compatible Noctua coolers. The mounting kit allows the cooler to be installed at a 90° angle if space permits, providing flexibility in installation based on individual build requirements.
Acoustic Performance
The NH-L9i-17xx is particularly noted for its low noise levels, featuring the NF-A9x14 fan, which delivers full cooling performance while remaining whisper-quiet at idle. This characteristic is important for users who prefer a silent computing environment. The NM-i17xx-MP78 does not contribute to acoustic performance as it is simply a mounting kit. Therefore, if noise levels are a concern, the NH-L9i-17xx stands out as the better option.
Warranty and Reliability
Noctua is known for its high-quality products, and the NH-L9i-17xx is backed by a 6-year manufacturer’s warranty. This long warranty period reflects the brand's confidence in the reliability and durability of their cooler. The NM-i17xx-MP78 does not come with a specified warranty, but its design focuses on outstanding reliability and optimal contact pressure, which suggests a commitment to quality. Nevertheless, the extended warranty of the NH-L9i-17xx offers added peace of mind for users.
Price Comparison
The NH-L9i-17xx is priced at C$59.95, positioning it as a premium product within the CPU cooling market. The NM-i17xx-MP78, on the other hand, is a budget-friendly option at only C$12.95. This significant price difference highlights the distinct roles of the products. If you require a complete cooling solution, the investment in the NH-L9i-17xx is justified. However, if you are looking for a cost-effective mounting solution for an existing cooler, the NM-i17xx-MP78 is an excellent choice.
Which should you buy?
Choosing between the Noctua NH-L9i-17xx and the NM-i17xx-MP78 ultimately depends on your needs. If you are in the market for a complete CPU cooling solution with excellent performance, quiet operation, and a long warranty, the NH-L9i-17xx is the superior option. However, if you already possess a compatible Noctua cooler and need a reliable mounting solution for Intel’s latest sockets, the NM-i17xx-MP78 offers great value at a low price. Consider your specific requirements to make the best decision for your system.
versusfinder.com is a participant in the Amazon.ca Associates Program. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

