The Noctua NH-L9x65 is a very quiet CPU cooler, which is not surprising considering it is a Noctua cooler after all. What is surprising is the perfect clearance on Intel systems, not only for memory but around the socket and the expansion slots. The cooler's tiny 92 mm x 92 mm x 65 mm size makes it possible. As always with Noctua products, the build quality is exceptional, while the SecuFirm 2 mounting system makes it easy to install. It is also well packaged, which is nice to see. Overall, the NH-L9x65 is a promising option for low-power HTPC and small form-factor systems as it should fit right in.

Sadly, I ran into a few issues on this particular model. First, at $52.90 MSRP, it is expensive for what little performance it offers. Next, performance is lacking. While fine at stock, it still gets extremely hot. With just a mild overclock, the CPU thermal throttled. It is not a good cooler for overclocked systems or higher TDP CPUs under heavy load. "Niche" is the perfect word to describe this cooler because it is perfect for specific situations—my test system isn't one of those. Finally, the color theme won't be to everyone's liking, but come on, you knew that already, it's NOCTUA!

Overall, the Noctua NH-L9x65 is not as bad a cooler as the review score may indicate. Its usability is limited to the point where Noctua provides a TDP guide for it and the CPUs and situations it will best perform with. If you plan to run overclocked high TDP processors, this is not the cooler for you. However, if your CPU falls into the proper category or you plan to run a stock system, the NH-L9x65 may be what you are looking for.

If you need a cooler that offers perfect clearance, low noise levels, and will fit nearly any chassis ever made, the Noctua NH-L9x65 might be what you need.