AMD 30925 manual Power Worksheet 2-Total Watts, Total Watts A = W For Each Voltage Level

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
		+3.3 V	+5 V	+12 V	–12 V	5 VSB

CD-ROM drive

CD-RW drive

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 1—Component Power, enter the total current for each column.

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
(V x A = W)		for Each Voltage Level
+3.3 V x (total amps)		Total Watts for +3.3 V
+5 V x (total amps)		Total Watts for +5 V
+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)
–12 V x (total amps)		Total Watts for –12 V
+5 VSB x (total amps)		Total Watts for 5 VSB
Total=		Total Combined Wattage=
Chapter 5	Hardware Considerations		33