My testing did show that this little cooler that can almost fit in the palm of your hand still kept an overclocked Ryzen 1700 a few degrees below 80 C. While that is a bit on the high side, I hesitate to list the cooling performance as a Con, because if you use the cooler within the design intention, which is small form factor cases and HTPC environments, then you will have no problems. It does a fine job of cooling. If you try to cool an overclocked gaming system, well, Noctua has a variety of coolers that are better choices.As for the acoustics, the Noctua NF-A9x14 fan is quite even at full speed. The case fans drowned out any sound from the Noctua fan.
Testurteil: "While large coolers are impressive and fun to show off, for small form factor builds you need a cooler that can get the job done in a small space. And that is just what the NH-L9x65 SE-AM4 does. The engineering that went into the entire package for the NH-L9x65 SE-AM4 is remarkable, from literally the box and internal packaging, to the installation hardware, cooler, and fan." (Ambrosidou Nat, XtremeSystems.org)
Noctua NH-L9x65 SE-AM4 is small but well performing cooler. It has all what you may need if you are looking for an AM4 cooler for your HTPC or even workstation. It performs well but also works quiet what isn’t expected on an eight core platform. There are of course better performing coolers like two other Noctua models which are in the comparison and we will tell you some more about them in next articles. However there are no other compact coolers for AM4 socket on the market which perform so good. What more so far there is no competition for Noctua NH-L9x65 and any other brand will have a hard time designing anything better.
Testurteil: "Noctua NH-L9x65 SE-AM4 is clearly the best choice if you are looking for a compact cooler for your AMD Ryzen computer. It’s small, well performing and quiet. What else you may need?" (Bartosz Waluk, FunkyKit.com)