Intel Pentium 4 Processor in the 478-PinPackage at 1.40 GHz, 1.50 GHz, 1.60 GHz, 1.70 GHz, 1.80 GHz, 1.90 GHz, and 2GHz

Boxed Processor Specifications
94 Datasheet
NOTE:
1. Set point variance is approximately ±1°C from fan heatsink to fan heatsink
Table 38. Boxed Processor Fan Heatsink Set Points
Boxed Processor Fan
Heatsink Set Point (ºC)
Boxed Processor Fan Speed Notes
33
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
40
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.
43
When the internal chassis temperature is above or equal to this
set point, the fan operates at its highest speed.
1