Intel Desktop Board D975XBX2 Technical Product Specification 
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Table 35 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 35. Thermal Considerations for Components 
Component  Temperature 
Intel 82801G ICH7-R/ICH7-DH  110 
o
C (under bias) 
Intel
 
82975X MCH  99 
o
C (under bias) 
Processor  For processor case temperature, see processor datasheets and 
processor specification updates 
Processor voltage regulator area  120 
o
C (under bias) 
 
NOTE 
For hardware monitoring application software, an alert point of 110 
o
C is recommended 
as a starting point for the processor voltage regulator area. 
 
For information about  Refer to 
Intel Pentium 4 processor datasheets and specification updates  Section 1.2, page 17 
2.12  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 board is 
99,721 hours.