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: 05-Nov-2014
    Date Created: 13-Jun-2012
    Back to Top