Current Usage
As an overall current usage limitation on the power supply, do not exceed a combined power output of 167 watts for the +5 V and +3.3 V outputs.
Calculating Power Usage
The total combined wattage for the system configuration must be less than 300 watts. Use the two worksheets in this section to calculate the total used by your system. For current and voltage requirements of
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 10. Power Usage Worksheet 1
Current (maximum) at voltage level:
Device | +3.3 V | +5 V | +12 V |
Boards, processors, and memory (get totals from your board manual)
SCSI backplane
Front panel board
Second
1st
2nd
3rd
4th
5th
1st IDE hard drive
2nd IDE hard drive
Cooling fan 1, 92 mm |
|
|
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| 0.4 A |
|
Cooling fan 2, 92 mm |
|
|
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| 0.4 A |
|
|
|
|
|
|
|
|
Cooling fan 3, 92 mm |
|
|
|
| 0.4 A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total Current |
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|
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|
| |
Maximum Ratings (for comparison) | 16.0 A | 26.0 A | 0.25 A | 10.0 A | 0.5 A | |
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Equipment Log and Worksheets | 59 |
