Noctua NM-i17xx-MP78 vs Thermalright Peerless Assassin 120 SE Black CPU Cooler
Updated August 2026 — The Thermalright Peerless Assassin 120 SE Black offers superior cooling performance and compatibility, making it the better choice overall.
The Thermalright Peerless Assassin 120 SE Black offers superior cooling performance and compatibility, making it the better choice overall.
Why Noctua NM-i17xx-MP78 is better
lower price
Noctua NM-i17xx-MP78 is priced at C$12.95
easy installation
Designed for straightforward installation with compatible Noctua coolers
specific compatibility
Tailored for Intel LGA1851 and LGA1700 sockets
Why Thermalright Peerless Assassin 120 SE Black CPU Cooler is better
better cooling
Thermalright has dual fans and higher airflow
wider compatibility
Supports multiple Intel and AMD sockets
measurable noise levels
Operates at a maximum of 25.6 dB(A)
Overall score
Specifications
| Spec | Noctua NM-i17xx-MP78 | Thermalright Peerless Assassin 120 SE Black CPU Cooler |
|---|---|---|
| Brand | Noctua | Thermalright |
| Model | NM-i17xx-MP78 | Peerless Assassin 120 SE Black |
| Socket Compatibility | LGA1851/1700 | LGA1150/1151/1155/1156/1200/1700/1851, AM4/AM5 |
| Cooling Type | Upgrade Kit | Complete Cooler |
| Fan Count | — | 2 |
Dimension comparison
Overview of CPU Coolers
When it comes to CPU cooling solutions, two products stand out: the Noctua NM-i17xx-MP78 and the Thermalright Peerless Assassin 120 SE Black CPU Cooler. The Noctua model is priced at a modest C$12.95, while the Thermalright alternative is significantly higher at C$46.79. This price difference indicates a potential variation in features and performance that could influence your decision on which cooler to choose.
Design and Build Quality
The Noctua NM-i17xx-MP78 boasts a dedicated one-piece backplate designed for optimal compatibility with Intel's LGA1851 and LGA1700 sockets. This level of attention to detail suggests a robust design tailored for specific processors. On the other hand, the Thermalright Peerless Assassin 120 SE Black features a dual tower and dual fan setup, designed to maximise heat dissipation. With a height of 155mm, it provides a substantial cooling area and is made from a combination of aluminum and copper materials. This dual approach in design may offer superior cooling performance compared to Noctua, which is primarily an upgrade kit without an inherent cooling system.
Cooling Performance
The cooling performance of the Thermalright Peerless Assassin 120 SE Black is highlighted by its dual PWM fans, which can achieve a maximum airflow of 66.17 CFM at a noise level of 25.6 dB(A). Such specifications suggest it can effectively manage heat during intensive CPU tasks. Conversely, the Noctua NM-i17xx-MP78 is an upgrade kit rather than a standalone cooler, which means its performance relies on the existing Noctua cooler it is upgrading. As a result, if you’re seeking a complete cooling solution, the Thermalright may be the better choice due to its higher airflow capabilities.
Compatibility
Compatibility is a critical factor when selecting a CPU cooler. The Noctua NM-i17xx-MP78 is designed specifically for Intel’s LGA1851 and LGA1700 sockets, making it an ideal choice if you own a compatible Noctua cooler. However, the Thermalright Peerless Assassin 120 SE Black shines with its extensive compatibility, supporting Intel sockets from LGA1150 to LGA1851 and AMD sockets AM4 and AM5. This broader compatibility makes it a versatile option for users with different CPU setups.
Installation Process
In terms of installation, the Noctua NM-i17xx-MP78 is designed for straightforward installation, featuring a tailor-made backplate that simplifies the upgrade process for users of compatible Noctua coolers. This ease of use can be a significant advantage for those who may not be experienced in PC building. On the contrary, the Thermalright Peerless Assassin 120 SE Black also offers a user-friendly installation experience, with included metal fasteners for both Intel and AMD platforms. While both products aim for easy installation, the specific compatibility of the Noctua may limit its appeal to a narrower audience.
Noise Levels
Noise levels are an essential consideration for many users. The Thermalright Peerless Assassin 120 SE Black operates at a maximum noise level of 25.6 dB(A), which is generally quiet for a CPU cooler of its size and capabilities. The Noctua NM-i17xx-MP78 does not specify noise levels, as it is designed as a mounting upgrade kit, which does not include fans. Therefore, if noise reduction is a priority, the Thermalright cooler may be more appealing due to its measurable noise performance.
Price Point
The price difference between the two products is quite striking. The Noctua NM-i17xx-MP78 is priced at C$12.95, making it an affordable option for those who already own a compatible Noctua cooler. In contrast, the Thermalright Peerless Assassin 120 SE Black is priced at C$46.79, reflecting its more comprehensive cooling capabilities and broader compatibility. The significant price gap may be a deciding factor for budget-conscious consumers who still seek effective cooling solutions.
Which should you buy?
In conclusion, the choice between the Noctua NM-i17xx-MP78 and the Thermalright Peerless Assassin 120 SE Black ultimately depends on your specific needs. If you already possess a compatible Noctua cooler and seek a simple upgrade with reliable installation, the Noctua option is a cost-effective choice. However, if you are looking for a complete cooling solution with superior performance, compatibility across multiple platforms, and a solid design, the Thermalright Peerless Assassin 120 SE Black would be the better investment despite its higher price.
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