Noctua NH-L9x65 CPU Cooler Review


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Low Profile Cooler Final Thoughts

In reference to it’s competition, the Noctua NH-L9x65 is a top of the line cooler with great technical features such as advanced Flow Acceleration Channels that allow the blades of it’s 92 mm fan to be more airflow efficient and reduce noise caused by the vortex phenomenon. It has major gains when compared to the Intel stock cooler in terms of performance and noise, and it is a very decent performer as it managed to cool our I5 4670k with no major hiccups. All of that topped with Noctua’s 6 year warranty and outstanding customer service make the NH-L9x65 a very good performer.


Noctua NH-L9x65 Ultimate Conclusion

The performance of the Noctua NH-L9x65 is what is expected from such a small cooler. It managed to make some gains when compared to the Intel stock cooler and it’s predecessor the NH-L9i, but there is a lack of major improvements that would make the NH-L9x65 comparable to any adequate tower heatsink. Overall, the NH-L9x65 managed to keep our i5 4670k under sustainable temperatures.

Unfortunately, it is impossible for us to test the reliability of most of the products we review. However, the Noctua NH-L9x65 shows some very positive signs when it comes to it’s overall construction. The mounting mechanism is sturdy and showed no signs of flex. The fins on the heatsink were not easily bent, and are protected by the fan at the top. There were also no flaws on the base plate of our sample, which should result in better performance.

Noctua was clever enough to give the NH-L9x65 a very simple and small layout. There are no ram or PCI clearance issues, which can be attributed to the cooler having a footprint of only 95 mm x 95 mm. Installation is not as hard as with some of the coolers we have seen this year with the SecuFirm 2 mounting system.

Our last score pertains to the value of the product at hand. The Noctua NH-L9x65 is priced online for $55.99 (Amazon) at the time of this review which is above average for a low profile cooler. This is a premium over the already free Intel stock coolerr. Of course, any Noctua product is more than a product and therefore should be consider a luxury.

Beauty is subjective but I will leave you guys to decide, do you like the Noctua NH-L9x65? Or do you think Noctua should make a more industrial version of this cooler?

Pros:Benchmark Reviews Silver Tachometer Award Logo (Small)

+ Improvement over the Intel Stock Cooler.
+ Simple, small design ensures no clearance issues.
+ Easy installation.
+ SecuFirm 2 mounting system works with any Noctua cooler.
+ 6-Year warranty.
+ Silent performance.


– Performance is not adequate for high TDP processors.
– Really expensive low-profile cooler.


  • Performance: 8.5
  • Appearance: 9.0
  • Construction: 9.75
  • Functionality: 9.5
  • Value: 7.0

Final Score: 8.75 out of 10.



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