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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
23.04.2014 - Crazypc.ro NH-D15
Test verdict: "Noctua își păstrează tradiția și continuă să ofere fanilor Noctua silențiozitate și performanță bună într-un singur pachet. Cu un design foarte reușit care a înlăturat problemele celebrului NH-D14, NH-D15 pe tot parcursul testelor s-a comportat impecabil." (Vlad Buluta, Crazypc.ro)
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23.04.2014 - ExtraHardware.cz NH-D15
Test verdict: "A to hlavne pre vynikajúce ventilátory, ktoré v kooperácii s pasívom perfektne fungujú i pri nízkej hlučnosti. K výslednému efektu lepšiu alternatívu asi nenájdete." (Ľubomír Samák, ExtraHardware.cz)
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22.04.2014 - WASD.ro NH-L12
Test verdict: "Daca cumva prindeti vreo reducere va recomand sa il achizitionati fara sa ezitati. Merita!" (Octavian Fulger, WASD.ro)
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22.04.2014 - ENG PC NH-U14S
Test verdict: "المشتت NH-U14S قدم أداءًا رائعًا غير متوقع وكان هذا بسبب اختلاف التصميم عن أخيه الأصغر NH-U12S أيضًا بسبب المروحة ذات القطر 14CM والتي يتحرك الهواء من خلالها بأسلوب أفضل من مروحة 12CM، أما عن الصوت فهو أهدأ ويشبه كثيرًا NH-D14 فينصح بهذا المشتت للوحات X79 ومعالجات LGA 2011 خاصة إن أردت كسر سرعتها، لذا أنصحك بتبديل مشتتك إن كان ذا صوت مرتفع وأداء أقل من المشتت NH-U14S" (Amir Abd EL Fattah, ENG PC)
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