Intel BONANZA S478 I875 ATX DDR BLKD875PBZLK Manual Do Utilizador

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BLKD875PBZLK
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Technical Reference 
  
81 
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 calculation for the Desktop 
Board D875PBZ is 96,624 hours. 
2.14 Environmental 
Table 42 lists the environmental specifications for the Desktop Board D875PBZ. 
Table 42.  Desktop Board D875PBZ Environmental Specifications 
Parameter Specification 
Temperature 
 
 Non-Operating  -40 
°C to +70 °C 
 Operating 
°C to +55 °C  
Shock 
 
 
Unpackaged 
50 g trapezoidal waveform 
 
Velocity change of 170 inches/second 
 
Packaged 
Half sine 2 millisecond 
 
Product Weight (pounds) 
Free Fall (inches) 
Velocity Change (inches/sec) 
 <20 
36 
167 
 21-40 
30 
152 
 41-80 
24 
136 
 81-100 
18 
118 
Vibration 
 
 
Unpackaged 
5 Hz to 20 Hz:  0.01 g² Hz sloping up to 0.02 g² Hz 
 
20 Hz to 500 Hz:  0.02 g² Hz (flat) 
 
Packaged 
10 Hz to 40 Hz:  0.015 g² Hz (flat) 
 
40 Hz to 500 Hz:  0.015 g² Hz sloping down to 0.00015 g² Hz