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Worksheet, Calculating DC Power Usage
1. List the current for each board and device in the appropriate voltage level column.
2. Add the currents in each column. Then go to the next worksheet.
Table 36.
Power Usage Worksheet 1
Device
Server board
Primary Processor
Secondary Processor (if
present)
Terminator card, if no second
processor
Memory (four 128 MB DIMMs)
PCI slot 1
PCI slot 2
PCI slot 3
ISA slot 1
ISA slot 2
st
1
3.5-inch hard disk drive
nd
2
3.5-inch hard disk drive
rd
3
3.5-inch hard disk drive
th
4
3.5-inch hard disk drive
th
5
3.5-inch hard disk drive
th
6
3.5-inch hard disk drive
3.5-inch diskette drive
CD-ROM drive
Cooling fan 1
Total Current
128
Current (maximum) at voltage level:
+3.3 V
+5 V
1.0 A
8.0 A
1.6 A
1.8 A
0.3 A
–5 V
+12 V
0.1 A
1.1 A
Information for Computer Integrators
–12 V
0.4 A
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