Worksheet, Calculating Dc Power Usage; Table A-2 Power Usage Worksheet - Silicon Graphics 1400 Server Family Maintenance And Upgrade Manual

Worksheet, Calculating DC Power Usage

1. List the current for each board and device in the appropriate voltage level column of
Table A-2.
2. Add the currents in each column. Then go to the next worksheet.
Table A-2 Power Usage Worksheet
Device, by Current (maximum)
at voltage level:
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
+3.3 V +5 V –5 V
0.3 A
0.4 A
Current Usage
+12 V –12 V
1.0 A
0.6 A
0.6 A
0.6 A
121