Technical Reference
73
Table 34 provides maximum case temperatures for the components that are sensitive to thermal
changes. The operating temperature, current load, or operating frequency could affect case
temperatures. Maximum case temperatures are important when considering proper airflow to cool
the board.
Table 34. Thermal Considerations for Components
Component Maximum Case Temperature
Intel Pentium 4 processor For processor case temperature, see processor datasheets and
processor specification updates
Intel
82945G GMCH 99
o
C (under bias)
Intel 82801G ICH7 110
o
C (under bias, without heatsink)
99
o
C (under bias, with heatsink)
For information about Refer to
Intel Pentium 4 processor datasheets and specification updates Section 1.2, page 15
2.13 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability Prediction
Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate
repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The MTBF for the D945GTP board is
108,165 hours.
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