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Inner Surface Microstructures

Inner Surface Microstructures are an advanced aerodynamic design measure first introduced with Noctua’s NF-F12 fan. Miniature dents at the inside of the fan frame create a turbulent boundary layer when the fan blades pass by. With the tips of the fan blades ploughing through this boundary layer, flow separation from the suction side of the blades is significantly reduced. As suction side flow separation is a major source of axial fan blade passing noise and leads to considerable losses in airflow and pressure efficiency, the use of Inner Surface Microstructures allows for lower noise emission and better performance at the same time. Reducing undesired turbulences caused by suction side flow separation, Inner Surface Microstructures help Noctua’s latest fans to keep pushing the boundaries in performance to noise efficiency.


Inner Surface Microstructures





Noctua
24.04.2015 - hwresources.org NH-L9x65
Test verdict: "Ci sentiamo di consigliare caldamente il nuovo Noctua per tutti gli usi, non solo per HTPC, tenere testa e battere soluzioni più grosse dimostra la cura in cui Noctua ripone nei suoi prodotti." (Michele Mura, hwresources.org)
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22.04.2015 - OCDrift.com NH-U9S
Test verdict: "In the end, the Noctua NH-D9L, U9S and L9x65 are certainly among the best 92 mm low-profile coolers in the market that money can buy. For rig builders who are planning to set up a small HTPC and small form factor system, these coolers could be the perfect choice for you!" (Kevin Owi Kheng Him, OCDrift.com)
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22.04.2015 - The Tech Buyer's Guru NH-L9x65
Test verdict: "All in all, then, the Noctua NH-L9x65 offers a winning combination of build quality, features, and performance for a niche, informed audience, willing to work within its limits to achieve truly stellar performance in an ultra-compact form factor." (Ari Altmann, The Tech Buyer's Guru)
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21.04.2015 - AwardFabrik.de NH-L9x65
Test verdict: "Noctua hat mit dem kompakten NH-L9x65 einen weiteren, sehr kompakten aber zugleich leistungsstarken Kühler für ITX Systeme bzw. HTPCs auf den Markt gebracht." (Denis Emmerich, AwardFabrik.de)
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