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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
17.04.2014 - mod-your-case.de NH-D15
Test verdict: "Mit dem NH-D15 hat Noctua einen neuen Kühler in sein Sortiment aufgenommen, welcher sich nicht nur durch seine Kühlleistung an Overclocker und Enthusiasten richtet, sondern auch durch seine Laufruhe, welche gerade über die PWM Steuerung dank der sehr guten Kühlleistung erzieht werden kann auch für Silentliebhaber das Maß aller Dinge darstellt." (Patrick Seus, mod-your-case.de)
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17.04.2014 - ChipLoco.com NH-D15
Test verdict: "So all in all, if you are in market for a high-end CPU cooler, the NH-D15 should be on the top of your list." (Afaq Shahid, ChipLoco.com)
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16.04.2014 - hardCOREware.net NH-D15
Test verdict: "So there you have it – the NH-D15 is tied for the highest performing air cooler we have ever tested, as it comes out of the box. It is even more impressive when you consider the noise level – other coolers may match it, but you pay for that with added noise." (Carl Nelson, hardCOREware.net)
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16.04.2014 - LanOC.org NH-U12S
Test verdict: "All in all the NH-U12S is a quality product with that trademark Noctua premium feel. The larger amount of space is a pleasant thing to see and even in double fan mode the NH-U12S will provide clearance for the newer quad-channel RAM motherboards. With all this performance in a smaller, easy to install package it is nice to see that the age of the air cooler has not yet passed." (William Deborde, LanOC.org)
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