Datasheet

92 Datasheet
Boxed Processor Specifications
6.4 Fan Heatsink Thermal Specifications
This section describes the cooling requirements of the fan heatsink solution utilized by the boxed
processor.
6.4.1 Intel
®
Boxed Processor Cooling Requirements
The boxed processor will be directly cooled with a fan heatsink. However, meeting the processor's
temperature specification is also a function of the thermal design of the entire system, and
ultimately the responsibility of the system integrator. Refer to Section 4.0 for processor
temperature specifications. The boxed processor fan heatsink is able to keep the processor
temperature within the specifications (see Table 25 and Table 26) in chassis that provide good
thermal management. For the boxed processor fan heatsink to operate properly, it is critical that the
airflow provided to the fan heatsink is unimpeded. Airspace is required around the fan to ensure
that the airflow through the fan heatsink is not blocked. Blocking the airflow to the fan heatsink
reduces the cooling efficiency and decreases fan life. Figure 53 illustrates an acceptable airspace
clearance for the fan heatsink. It is also recommended that the air temperature entering the fan be
kept below 45 °C (see Figure 53 for measurement location). Again, meeting the processor's
temperature specification is the responsibility of the system integrator. Refer to Section 4.0 for
processor temperature specifications.
Figure 55. Recommended Baseboard Power Header Placement Relative to Fan Power
Connector and Intel
®
Pentium
®
III Processor
Table 40. Baseboard Fan Power Connector Location
Fig. Ref.
Labels Dimensions (Inches) Min Typ Max
V
Approximate perpendicular distance of the fan power connector
from the center of the 242-contact slot connector
1.44
W
Approximate parallel distance of the fan power connector from
the edge of the 242-contact slot connector
1.45
X
Lateral distance of the baseboard fan power header location
from the fan power connector
4.75
242-Contact Slot Connector
W
V
Fan power connector location
(1.56 inches above motherboard
Motherboard fan power header should be
positioned within 4.75 inches of the fan
power connector (lateral distance).
X