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31684 Rev. 3.00 September 2004
Builder’s Guide for AMD Athlon™ 64 Processor-
Based Desktops and Workstations
Table 1. Power Worksheet 1—Component Power
Power Worksheet 1—Component Power
Device
Item
Qty
Maximum Current at Each Voltage Level
+3.3 V +5 V +12 V –12 V 5 VSB
Motherboard w/on-board devices
System fan
Processor fan
Memory module
AGP VGA card
PCI modem card
PCI sound card
PCI NIC card
PCI SCSI card
Other PCI card/Bus card
PCI RAID card
IDE hard drive
SCSI hard drive
CD-ROM drive
CD-RW drive
DVD drive
Floppy disk 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 , 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.
Chapter 4
Hardware Considerations 27