Intel SC450NX Product Guide - Page 165

Configuration Worksheets, Current, Calculating Power Usage, Worksheet

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Configuration Worksheets The rest of this chapter consists of worksheets to record the settings you make when configuring the system using the SSU, BIOS Setup, and the Symbios SCSI Utility. If default values ever need to be restored to CMOS (e.g., after a CMOS-clear), you must reconfigure the system. Referring to the filled-in worksheets could make your task easier. Circle or write in your selections or the values that are displayed onscreen. Current Usage As an overall current usage limitation on the power supply, do not exceed a combined power output of 195 watts for the +5 and +3.3 volt outputs. Calculating Power Usage The total combined wattage for the system configuration must be less than 400 watts. Use the two worksheets in this section to calculate the total used by your system. For current and voltage requirements of add-in boards and peripherals, see your vendor documents. 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. Worksheet 1. Power Usage Worksheet 1 Device Boards, processors, and memory (get totals from your board manual) SCSI backplane Front panel board 3.5-inch diskette drive CD-ROM drive Second 5.25-inch device 1st hot-swap hard drive 2nd hot-swap hard drive 3rd hot-swap hard drive 4th hot-swap hard drive 5th hot-swap hard drive Cooling fan 1, 120 mm Cooling fan 2, 120 mm Cooling fan 3, 120 mm Total Current Current (maximum) at voltage level: +3.3 V +5 V -5 V +12 V 0.3 A 0.4 A 1.0 A 0.6 A 0.6 A 0.6 A -12 V 165

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165
Configuration Worksheets
The rest of this chapter consists of worksheets to record the settings you make when configuring
the system using the SSU, BIOS Setup, and the Symbios SCSI Utility.
If default values ever need
to be restored to CMOS (e.g., after a CMOS-clear), you must reconfigure the system.
Referring to
the filled-in worksheets could make your task easier.
Circle or write in your selections or the values that are displayed onscreen.
Current Usage
As an overall current usage limitation on the power supply, do not exceed a combined power
output of 195 watts for the +5 and +3.3 volt outputs.
Calculating Power Usage
The total combined wattage for the system configuration
must be less than 400 watts.
Use the
two worksheets in this section to calculate the total used by your system.
For current and voltage
requirements of add-in boards and peripherals, see your vendor documents.
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.
Worksheet 1.
Power Usage Worksheet 1
Current (maximum) at voltage level:
Device
+3.3 V
+5 V
–5 V
+12 V
–12 V
Boards, processors, and memory (get totals from
your board manual)
SCSI backplane
Front panel board
3.5-inch diskette drive
0.3 A
CD-ROM drive
0.4 A
1.0 A
Second 5.25-inch device
1st hot-swap hard drive
2nd hot-swap hard drive
3rd hot-swap hard drive
4th hot-swap hard drive
5th hot-swap hard drive
Cooling fan 1, 120 mm
0.6 A
Cooling fan 2, 120 mm
0.6 A
Cooling fan 3, 120 mm
0.6 A
Total Current