Technical Reference
67
For information about
Refer to
Processor datasheets and specification updates
Section 1.2, page 14
Intel Q45 Express chipset datasheets, specification updates,
and design guides
http://www.intel.com/pro
ducts/chipsets/index.htm
2.7
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 Intel Desktop Board
DQ45CB MTBF is 102,310 hours.
2.8
Environmental
Table 30 lists the environmental specifications for the board.
Table 30. Intel
®
Desktop Board DQ45CB Environmental Specifications
Parameter Specification
Temperature
Non-Operating -20
°
C to +70
°
C at 95% humidity
Operating
0
°
C to +50
°
C at 90% humidity
Shock
Unpackaged
50 g trapezoidal waveform
Velocity change of 170 inches/second²
Packaged
Half sine 2 millisecond
Product weight (pounds)
Free fall (inches)
Velocity change
(inches/sec²)
<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
