Processors
Desktop
Is it normal that start and stop behavior is seen at system startup?

The start and stop behavior seen at system startup is normal. This is the result of using a new controller in the fan beginning 2012, which senses the fan rotor position at startup.

  • These fans are operating as expected, the fan starts and stops for three to five seconds at system startup.
  • The controller pulses the rotor two times to establish the rotor position, verifies the rotation direction, and then starts.
  • After starting, the fan quickly ramps to full speed and then assumes normal speed per the operating conditions.

    This applies to:

    Intel® Celeron® Desktop Processor
    Intel® Core™ i3 Desktop Processor
    Intel® Core™ i5 Desktop Processor
    Intel® Core™ i7 Desktop Processor
    Intel® Pentium® Processor for Desktop

    Solution ID: CS-033607
    Last Modified: 18-Jun-2012
    Date Created: 13-Jun-2012
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