E2000 datasheet(100/104 Pages) INTEL

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Boxed Processor Specifications

100

Datasheet

7.3.2

Fan Speed Control Operation (Intel® Pentium® Dual-Core

Desktop Processor E2000 Series)

If the boxed processor fan heatsink 4-pin connector is connected to a 3-pin

motherboard header it will operate as follows:

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 than a lower set point. These set points,

represented in Figure 31 and Table 35, 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 specification (see Chapter 5) 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

Table 35 for the specific requirements.

Figure 31.

Boxed Processor Fan Heatsink Set Points

Lower Set Point

Lowest Noise Level

Internal Chassis Temperature (Degrees C)

Increasing Fan

Speed & Noise

Higher Set Point

Highest Noise Level

E2000 Datasheet(PDF) 100 Page - Intel Corporation