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Noctua SSO-Bearing
Thanks to an optimised principle of operation, the self-stabilising oil-pressure bearing (SSO bearing) surpasses current types of ball, sleeve or liquid bearings in terms of long-term stability and quietness.

    Noctua - Bild
    The rotary motion of the axis generates pressure upon the special oil enclosed within the bearing. This causes the build-up of a dynamic pressure field that centres and stabilises the axis within the bearing shell. While conventional liquid bearings employ the principle of hydrodynamic pressure too, the SSO bearing is equipped with an additional magnet that supports the self-stabilisation of the rotor axis. This allows for a faster, more precise and more reliable centring of the rotor axis and thus increases the long-term stability and quietness of the bearing: When the fan starts, the dynamic pressure field of the liquid bearing needs to build up first, which results in an initial precession of the axis, the so called gyro effect. This amounts to an increased abrasion until the axis is stabilised through the build-up of the dynamic pressure field, which may by and by lead to increased noise emission and bearing defects. Because of this, the SSO bearing possesses a built in magnet, whose field ensures the immediate self-stabilisation of the rotor and hence reduces the gyro effect. In addition to the stabilisation during the start-up phase of the fan, the supporting magnet allows for a more exact centring of the axis within the bearing shell and thus further reduces bearing resistance, abrasion and noise emission.

    Noctua - Bild





    Noctua - Bild
    The sleeve and ball bearings currently predominating the fan market exhibit major drawbacks: While conventional sleeve bearings initially have very low noise emissions, they mostly possess unsatisfying long-term stability, which leads to a short overall lifespan and increasing noise after longer operating times. High grade ball bearings, on the other hand, while providing satisfying long-term stability operate at slightly higher noise levels from the beginning. The SSO bearing not only surpasses the quietness of conventional sleeve bearings but also the long-term stability of current top-of-the-line ball bearings.

    Noctua - Bild




Noctua
18.12.2014 - Tom's Hardware NH-L12
Test verdict: "For a Mini-ITX CPU cooler, the Noctua NH-L12 is somewhat of a luxury product. But like any luxury item, this heat sink comes with all the bells and whistles. While the price might be high compared to competing coolers, the NH-L12’s quality, configurability and extras make this cooler a value nonetheless." (Thomas Soderstrom, Tom's Hardware)
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18.12.2014 - hardwarepoint.net NH-U14S
Test verdict: "Der NH-U14S ist noch leistungsfähiger als der ohnehin schon gut abschneidende Dark Rock 3 und hält somit die CPU noch kühler. Hinzu kommt das bessere Montagesystem, was am Ende auch einen teureren Einkaufspreis nach sich zieht." (Dennis Heinze, hardwarepoint.net)
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18.12.2014 - Donanimhaber Forum NH-U9S
Test verdict: "Uzun lafın kısası ufak form faktörde bir bilgisayar topluyorsanız ve size ram,ekran kartı, kasa uyumuyla sıkıntı yaşatmayacak bir hava soğutma çözümü arıyorsanız NH-U9S ye bakmanızı mutlaka tavsiye ederim. Zira şu an piyasada pek alternatifi ortada gözükmüyor. Altı sene garantide cabası." (Ali Emre Alıcı, Donanimhaber Forum)
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17.12.2014 - HT4U.net NH-U9S
Test verdict: "Noctuas jüngste Sprösslinge glänzen mit den üblichen Werten des Herstellers. Hervorragende Verarbeitung und Kompatibilität, einem wirklich tollen Montagesystem, bei welchem sich so mancher Anbieter eine Scheibe abschneiden könnte und einer guten Leistungsfähigkeit." (Peter Gräber, HT4U.net)
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