@r1ppch3n
öhm also strom mit pausen durchschicken, also ständiges beschleunigen und abbremsen, weiss net mehr genau wie sich das verfahren nannte
@maniac
also mein pc ist nicht lautlos, sehr angenehme geräuschkulisse halt

und es kommt mir ja auch komisch vor, dass ne einrichtung zur senkung des geräuschpegels zur erhöhung des gleichen beiträgt...
edit:
hab gefunden wie diese methode sich nennt: Pulsweitenmodulation
PWM.
Pros: As linear voltage regulator, plus comparatively little heat is generated by the circuit allowing higher powered fans to be used, output is virtually 0-100%, eliminating the need for a bypass switch, fans do not stall or fail to start at minimum fan speed.
Cons: The fan speed sensing is disabled, can cause "growling" noises at very low speed settings with some fans.
What is PWM? In simple terms, PWM involves rapidly switching the supply to the fan on and off, in this case 30 times a second, (30Hz). By altering the relative on to off times the average voltage "seen" by the fan is also altered. E.G. Assuming a 12V supply, when the on/off ratio = 50%/50% the fan will "see" 6V, likewise when the on/off ratio is 75%/25% the fan"sees" 9V. Obviously 100% output is achieved by having the output on continuously and at 0% the output is off. It is this on/off switching that makes the fan speed sensor inoperative.