Data Sheet
Page 94
...control over a short range of the fan for the boxed processor. This allows the processor fan to operate at different speeds over fan speed. The Internal chassis temperature should be designed with a fan speed controller with the internal temperature until the higher set ...operate at a lower speed and noise level, while internal chassis temperatures are low. See Table 32 for the specific requirements. 94 Datasheet Fan Speed Control Operation (Intel® Core™2 Quad processor) If the boxed processor fan heatsink 4-pin connector is connected to a 3-pin motherboard...
...control over a short range of the fan for the boxed processor. This allows the processor fan to operate at different speeds over fan speed. The Internal chassis temperature should be designed with a fan speed controller with the internal temperature until the higher set ...operate at a lower speed and noise level, while internal chassis temperatures are low. See Table 32 for the specific requirements. 94 Datasheet Fan Speed Control Operation (Intel® Core™2 Quad processor) If the boxed processor fan heatsink 4-pin connector is connected to a 3-pin motherboard...