Intel BOXD955XCSLKR Product Specification - Page 73

Reliability

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Technical Reference Table 36 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 36. Thermal Considerations for Components Component Processor voltage regulator area Temperature 120 oC (under bias) Intel Pentium 4 processor Intel 82955X MCH Intel 82801GR ICH7-R For processor case temperature, see processor datasheets and processor specification updates 99 oC (under bias) 110 oC (under bias) NOTE For hardware monitoring application software, an alert point of 110 oC is recommended as a starting point for the processor voltage regulator area. For information about Intel Pentium 4 processor datasheets and specification updates Refer to Section 1.2, page 15 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 91425.23 hours. 73

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Technical Reference
73
Table 36 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 36.
Thermal Considerations for Components
Component
Temperature
Processor voltage regulator area
120
o
C (under bias)
Intel Pentium 4 processor
For processor case temperature, see processor datasheets and
processor specification updates
Intel
82955X MCH
99
o
C (under bias)
Intel 82801GR ICH7-R
110
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 15
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 91425.23
hours.