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Fan control during low temperature operations to reduce platform power

  • US 9,459,677 B2
  • Filed: 10/21/2014
  • Issued: 10/04/2016
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • 1) determining a power consumption of a computer system, wherein the power consumption of the computer system comprises at least a sum of power consumption for a cooling fan and power consumption for a device being cooled by the fan;

    2) changing a fan speed of the fan in a first direction and determining if the power consumption of the computer system increased or decreased after said changing in the first direction;

    3) i) if the power consumption decreased in operation

         2), changing the fan speed again in the first direction;

    ii) if the power consumption increased in operation

         2), changing the fan speed in a second direction;

    iii) if the power consumption did not change in operation

         2), not changing the fan speed;

    4) repeating operations

         2) and

         3);

    Wherein said first direction is either increasing or decreasing the fan speed, said second direction is decreasing the fan speed if the first direction is increasing the fan speed, and the second direction is increasing the fan speed if the first direction is decreasing the fan speed.

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