Browse Prior Art Database

Ensure Cooling Fan Operation in High Power Pentium Systems

IP.com Disclosure Number: IPCOM000115208D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 84K

Publishing Venue

IBM

Related People

Locker, HJ: AUTHOR [+2]

Abstract

Disclosed is a method to ensure the correct of airflow over a Pentium* processor during system operation. Correct amount of airflow is required or the processor will be damaged beyond repair. If this happens the machine must be replaced at great cost to the end user or IBM** (if under warranty).

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This is the abbreviated version, containing approximately 52% of the total text.

Ensure Cooling Fan Operation in High Power Pentium Systems

      Disclosed is a method to ensure the correct of airflow over a
Pentium* processor during system operation.  Correct amount of
airflow is required or the processor will be damaged beyond repair.
If this happens the machine must be replaced at great cost to the end
user or IBM** (if under warranty).

      Pentium processors generate a large amount of heat.  Each
processor generates over 8 watts of heat.  New Pentium systems
support two way multiprocessing with a total heat generation of 16
watts.  The large amount of heat in a small space requires dedicated
fans to ensure the proper airflow.  Proper airflow is required to
ensure the processor stays in the recommended temperature range.
Exceeding the recommended temperature range will permanently  damage
the processor.  The processor is a $800 dollar device.

      New IBM PC Company Pentium designs have added a dedicated fan
near the processor to ensure proper airflow.  The fan plugs into the
planar via a cable.  This cable provide power to the fan.  Problem is
what happens if the fan is not plugged into the planar.  Not plugging
in cables is a common manufacturing defect.  If this happens than the
fan does not get any power and will not operate.

The solution is to prevent the power supply from providing power to
the planar unless the dedicated fan cable is connected to the planar.
Therefore it will be impossible for the end user to power on the
system and damage the expensive system.  In fact this error will be
discovered in system manufacturing before i...