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Smooth Commutation Drive

Next to aerodynamic noise and bearing related noises, the so called "commutation noise" or "switching noise" can play a major role in the noise emission of axial fans with brushless DC motors. At each transition from one stator coil to another, the rotor receives a sudden torque pulse when the next coil switches on. Each of these torque pulses causes a minute deformation of the whole fan structure. Depending on rpm, torque and the material of the fan, this can result in noticeable noises.

Noctua's Smooth Commutation Drive system provides more continuous switching in order to achieve a smoother transition between the stator coils and thereby significantly contributes to the fan's overall quietness. The second generation of this technology (SCD2) further improves running smoothness and reduces minute noises in close proximity to the motor.


Noctua
29.08.2015 - [blank]'s Universe NH-C14S
Test verdict: "It's hard to find something bad to say about Noctua coolers so if you are in the market for a small form factor, high performance cooler with a price that wont break the bank, look no further than the Noctua NH-C14S." (Martin Tam, [blank]'s Universe)
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28.08.2015 - FunkyKit.com NH-C14S
Test verdict: "The NH-C14S definitely took the cake for C-types. The cooling capabilities are great and the residual airflow cools your motherboard components as well. If you are in the market for a C-type cooler look no further as the NH-C14S will meet your demands." (Chris McCart, FunkyKit.com)
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28.08.2015 - hardwarepoint.net NH-C14S
Test verdict: "Insgesamt ein klasse Tipp für diejenigen unter euch, die gute Kühlleistung unter eingeschränkten Platzverhältnissen suchen. Auch in kleinen Gehäusen kann leise gekühlt werden." (Dennis Heinze, hardwarepoint.net)
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26.08.2015 - FunkyKit.com NH-D15S
Test verdict: "The price point is high but you do receive the best cooling money can buy!" (Chris McCart, FunkyKit.com)
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