Boxed Processor Specifications
100
Datasheet
If the new 4-pin active fan heat sink solution is connected to an older 3-pin baseboard
CPU fan header it will default back to a thermistor controlled mode, allowing
compatibility with existing 3-pin baseboard designs. Under thermistor controlled mode,
the fan RPM is automatically varied based on the Tinlet temperature measured by a
thermistor located at the fan inlet.
For more details on specific motherboard requirements for 4-wire based fan speed
control see the Yorkfield Processor Thermal and Mechanical Design Guidelines
Addendum.
§