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Appendix C: Equipment log and configuration worksheets
196
Calculating power consumption
The total combined wattage for the system configuration must be less
than the output of your power supplies. Use the two worksheets in
this section to calculate the power used by your system. For current
and voltage requirements of add-in boards and peripherals, refer to
the vendor documents.
Calculating DC power usage
1 List the current for each board and device in the appropriate
voltage level column in the Power Usage Worksheet 1.
2 Add the currents in each column then go to the next worksheet.
Power Usage Worksheet 1
Device Current (maximum) voltage level
+3.3 V +5 V
5 V
Standby
+12 V -12 V
Server board
set
Primary
processor
Second
processor
Third
processor
Fourth
processor
Memory
PCI slot 1
PCI slot 2
PCI slot 3
PCI slot 4
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