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B. Thermal Considerations
This appendix describes the thermal requirements for reliable operation of a ZT 5504 using the
Mobile Pentium III Processor - M. It covers basic thermal requirements and provides specifics
about monitoring the board and processor temperature.
Thermal Requirements
The ZT 5504 is equipped with an integrated heatsink for cooling the processor module. The
maximum processor core temperature must not exceed 100°C. The heatsink allows a
maximum ambient air temperature of 50°C with 200 linear feet per minute (LFM) of airflow. The
maximum power dissipation of the CPU is 21 W at 850 MHz and 1.60V.
CAUTION:
the CPU. Intel strongly recommends the use of a fan tray below the card rack to supply the
external airflow.
The "Thermal Requirements" table below shows the relationship between ambient air
temperature, board temperature, and processor core temperature.
Thermal Requirements
External Ambient
Air Temperature (
0
5
10
15
20
25
30
35
40
45
50
55
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External airflow must be provided at all times during operation to avoid damaging
Temperature
°
C)
Around the Board (
13
18
22
27
33
37
42
47
52
57
63
68
Pentium III Processor
°
C)
Core Temperature (
44
49
54
60
65
69
74
79
84
89
95
100 = maximum
°
C)
67
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