Als je het zelf in elkaar wilt tweaken begrijp ik dat wel.
Wil je niet al teveel moeite doen, koop een nieuwe voeding waar het standaard in zit.
(Zelf heb ik er een in m'n SuperMicro SC760-A servercase
)
Zoals deze SuperMicro SP301-RA
The redundant cooling system includes an additional back-up fan, which operates independently from the primary fan, and a thermal control circuit that includes a solid state temperature sensor. This sensor detects ambient temperature changes inside the power supply, and is connected to the fan power drives of both the primary and back-up fans. The thermal control circuit works with the temperature sensor to trigger a response whenever specific high and low temperature thresholds are exceeded. This circuitry enables the primary fan to increase its RPM simultaneously with increases in the ambient temperature until reaching full speed at 40°C.
Power supply fans inevitably break down over long periods of use, due simply to the wearing out of their parts. If this happens, or if the ambient temperature exceeds approximately 68°C, the cooling system’s back-up fan automatically turns on, an alarm sounds and a warning LED is illuminated. The power supply includes an external button to turn the alarm off, but the LED display remains lit until corrective measures have been taken. These warning signals give system administrators advance notice of fan breakdown or dangerous rises in the power supply temperature. In addition, the system will be protected until it can be safely shut down to replace the primary fan or to correct the cause of the heat problems. These Redundant Cooling Power Systems are especially appropriate for servers or workstations, where system integrity is critical.
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de SP401-RA.