30925 Rev. 3.04 February 2004 | Builder’s Guide for AMD Opteron™ Processor- |
| Based Servers and Workstations |
Table 1. Power Worksheet 1—Component Power (Continued)
Component | Item | Maximum Current at Each Voltage Level | |||||
Qty | |||||||
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| +3.3 V | +5 V | +12 V | 5 VSB | ||
DVD drive
Floppy drive
Tape drive
ZIP drive
USB devices
IEEE 1394 devices
Keyboard
Mouse
Other devices (if any)
Processor
Total current for all devices
Use the following steps to determine the total combined power used by the system.
1.From Power Worksheet
2.Multiply the voltage by the total current to get the total wattage for each voltage level.
3.Add the total wattage for each voltage level to arrive at a total combined power usage on the power supply.
Table 2. Power Worksheet 2—Total Watts
Voltage Level and Total Current |
| Total Watts |
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(V x A = W) |
| for Each Voltage Level |
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+3.3 V x (total amps) |
| Total Watts for +3.3 V |
|
+5 V x (total amps) |
| Total Watts for +5 V |
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+12 V (I/O) x (total amps) |
| Total Watts for +12 V (I/O) |
|
+12 V (processor) x (total amps) |
| Total Watts for +12 V (processor) |
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| Total Watts for |
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+5 VSB x (total amps) |
| Total Watts for 5 VSB |
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Total= |
| Total Combined Wattage= |
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Chapter 5 | Hardware Considerations | 33 | |
