Intel Pentium 4 Processor Extreme Edition on 0.13 Micron Process in the 775-Land Package Datasheet

Datasheet 87
Boxed Processor Specifications
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Table 7-2. Boxed Processor Fan Heatsink Set Points
Boxed Processor
Fan Heatsink Set
Point (ºC)
Boxed Processor Fan Speed Notes
X ≤ 30
When the internal chassis temperature is below or equal to this set point,
the fan operates at its lowest speed. Recommended maximum internal
chassis temperature for nominal operating environment.
1
NOTES:
1. Set point variance is approximately ±1°C from fan heatsink to fan heatsink.
Y = 34
When the internal chassis temperature is at this point, the fan operates
between its lowest and highest speeds. Recommended maximum
internal chassis temperature for worst-case operating environment.
—
Z ≥ 38
When the internal chassis temperature is above or equal to this set point,
the fan operates at its highest speed.
1