Intel SPSH4 Product Guide - Page 163

Calculating Power Consumption, Calculating DC Power Usage

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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, see your vendor documents. 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 22. Power Usage Worksheet 1 Current (maximum) at voltage level: Device +3.3 V +5 V 5 V Standby Server board set Primary Processor Second Processor Third Processor Fourth Processor Memory PCI slot 1 PCI slot 2 PCI slot 3 PCI slot 4 PCI slot 5 PCI slot 6 PCI slot 7 PCI slot 8 1st 3.5-inch hard disk drive 2nd 3.5-inch hard disk drive 3rd 3.5-inch hard disk drive 4th 3.5-inch hard disk drive 5th 3.5-inch hard disk drive 3.5-inch diskette drive CD-ROM drive 2nd 5.25-inch peripheral drive 3rd 5.25-inch peripheral drive Fans Total Current +12 V -12 V Equipment Log and Configuration Worksheets 163

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Equipment Log and Configuration Worksheets
163
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, see your vendor documents.
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 22.
Power Usage Worksheet 1
Current (maximum) at voltage level:
Device
+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
PCI slot 5
PCI slot 6
PCI slot 7
PCI slot 8
1
st
3.5-inch hard disk drive
2
nd
3.5-inch hard disk drive
3
rd
3.5-inch hard disk drive
4
th
3.5-inch hard disk drive
5
th
3.5-inch hard disk drive
3.5-inch diskette drive
CD-ROM drive
2
nd
5.25-inch peripheral drive
3
rd
5.25-inch peripheral drive
Fans
Total Current