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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.

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    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
21.10.2014 - EnlaceHW.com NF-A4x10 5V
Test verdict: "Los ventiladores A-Series se mantienen fieles al nivel de calidad que uno espera de la marca Noctua. La construcción es excelente y refleja el alto nivel de la mano de obra en su fabricación. La robustez de los diferentes materiales involucrados en el proceso es evidente y se pueden apreciar a través de los detalles del marco del ventilador y hasta en los paneles anti vibraciones."
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21.10.2014 - PCGamers.net.au NH-D15
Test verdict: "The NH-D15 is a great option for those chasing a super quiet rig and builders who don't want to use closed loop water coolers but still want to chase heavy overclocks. It isn't cheap but it's build to last and performs well at a whisper. This is a well finished and thought out cooler and a worthy successor to the iconic NH-D14." (Phil Carroll, PCGamers.net.au)
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21.10.2014 - HwT.dk NH-D15
Test verdict: "Noctuas nye topmodel lever uden problemer op til forventningerne. Et lækkert kvalitetsprodukt som leverer hele vejen igennem, især når det kommer til køleevne. Det er desuden rigtigt flot at se hvor meget Noctua har forbedret sig i forhold til den gamle topmodel, NH-D14, som stadig er en god køler, bare ikke helt så god som den nye NH-D15." (Lynge Poulsgaard, HwT.dk)
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20.10.2014 - TechTesters NH-L12
Test verdict: "De NH-L12 is net als z’n broertjes en zusjes bedoeld is als een product voor echte liefhebbers die graag iets meer uitgeven om net die beetje extra prestaties te halen, of die de typische Noctua-ervaring reeds waarderen, en met dat in het achterhoofd doet de NH-L12 het zoals verwacht uitstekend." (Stephan Overbeeke, TechTesters)
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