Enterprise-IV EISA VLB Motherboard User's Guide
89
Appendix A
Temperature and Power Considerations
Temperature Ranges
The values in the following table are ambient temperatures inside the computer case. The board
temperatures reflect the 80486 CPU Heat dissipation requirements because it is the hottest component.
Temperature specifications vary with the CPU frequency.
Frequency
Heat
Sink
Airflow over
CPU
Airflow over
other
components
Temperature
Range
20 or 25 MHz
NO
400 feet per
minute
Not critical
0
°
through 47
°
C.
33 MHz
NO
400 feet per
minute
Not critical
0
°
through 36
°
C.
50 MHz
YES
200 feet per
minute
Not critical
0
°
through 50
°
C.
Humidity
The recommended humidity range for operation of the American Megatrends Enterprise-IV EISA VLB
motherboard is 20% to 80% non-condensing.
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