- Review -

12.03.2023 CDRinfo.com

Under normal loads, both Noctua NH-D9L and NH-U9S had much better performance than what the AMD stock CPU fan can handle. We added a second fan 92mm fan to both NH-D9L and NH-U9S and we noticed that the NH-D9L, probably due to volume mass didn't get any major performance improvement. However the NH-U9S did get a great boost in cooling performance which troubled us that measurements were false, however, even with repeated tests it showed similar performance dropping from 67.93 Celsius to 63.59 Celsius (average measured). For sure the NH-U9S is a good performer and the much smaller NH-D9L is far behind due to the mass/volume of the overall cooler.

"The Noctua NH-D9L is a product designed to have full 3U rack compliance with very low height, a central 92mm Noctua fan, and a complete retail package. The mounting mechanism was very easy to perform and we like the way Noctua designs its product and offers free support for older (and perhaps newer) sockets like the Intel LGA 775/1366. In terms of performance, you should expect much better performance compared with Intel/AMD stock CPU coolers" (Alex Macris, CDRinfo.com)