Boxed Processor Specifications
100
Thermal/Mechanical Specifications and Design Guidelines
11.4.2
Variable Speed Fan
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 then lower set point. These set points, represented in
and
, can vary by a few degrees from fan heatsink to fan heatsink. The internal
chassis temperature should be kept below 40 ºC. Meeting the processor's temperature
specification (see
) is the responsibility of the system integrator.
The motherboard must supply a co12 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.
Figure 11-9. Boxed Processor Fan Heatsink Set Points
Summary of Contents for 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - THERMAL MECHANICAL S AND DESIGN GUIDELINES 01-2011
Page 12: ...Introduction 12 Thermal Mechanical Specifications and Design Guidelines...
Page 36: ...Independent Loading Mechanism ILM 36 Thermal Mechanical Specifications and Design Guidelines...
Page 62: ...PECI Interface 62 Thermal Mechanical Specifications and Design Guidelines...
Page 88: ...ATX Reference Thermal Solution 88 Thermal Mechanical Specifications and Design Guidelines...
Page 102: ...Boxed Processor Specifications 102 Thermal Mechanical Specifications and Design Guidelines...
Page 120: ...Mechanical Drawings 120 Thermal Mechanical Specifications and Design Guidelines...
Page 126: ...Socket Mechanical Drawings 126 Thermal Mechanical Specifications and Design Guidelines...
Page 130: ...Package Mechanical Drawings 130 Thermal Mechanical Specifications and Design Guidelines...
