Intel Celeron 440 HH80557RG041512 Data Sheet

Datasheet

97

The boxed processor fan will operate at different speeds over a short range of internal 

chassis temperatures. This allows the processor fan to operate at a lower speed and 

noise level, while internal chassis temperatures are low. If internal chassis temperature 

increases beyond a lower set point, the fan speed will rise linearly with the internal 

temperature until the higher set point is reached. At that point, the fan speed is at its 

maximum. As fan speed increases, so does fan noise levels. Systems should be 

designed to provide adequate air around the boxed processor fan heatsink that remains 

cooler then lower set point. These set points, represented in 

, 

can vary by a few degrees from fan heatsink to fan heatsink. The internal chassis 

temperature should be kept below 38 ºC. Meeting the processor's temperature 

) is the responsibility of the system integrator.

The motherboard must supply a constant +12 V to the processor's power header to 

ensure proper operation of the variable speed fan for the boxed processor. Refer to 

 for the specific requirements.

°

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

1. Set point variance is approximately ± 1 °C from fan heatsink to fan heatsink.

Y = 35

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.

-

Lower Set Point

Lowest Noise Level

Internal Chassis Temperature (Degrees C)

X

Y

Z

Increasing Fan
Speed & Noise

Higher Set Point

Highest Noise Level