Is your computer's power supply enough?

Have you ever wondered how power is distributed inside of a computer? Break down the components of your computer and add their wattages together, then add 30% of that number to the final total to determine how much power your system needs. For example:

AnythingPC's Economy System

AMD Athlon XP 2600+ Processor...80
Motherboard...25
256 DDR 2700 Memory...10
Onboard Sound and Video...0
Integrated Networking...0
40 GB Hard Drive...25
Optional Modem...5
CD-RW Drive...35
Floppy Drive...5
Keyboard and Mouse...6
Case Fans...6
The total is 197. With 30% (60 watts) added in for safety, that brings the total wattage needed to 257.

Common Computer Part Wattage Needs

Component
Watts
Processor
 AMD Athlon 64/64 FX 90-110
AMD Thunderbird 50-60
AMD Athlon XP 50-80
AMD Duron 40-60
Intel Pentium 4 60-100
Intel Pentium 3 25-40
Intel Celeron 30-60
Graphics Card
 Basic 25
High-Performance 30-100+
Other Parts
 Motherboard 18-28
Optical Drive 25-35
Hard Drive 25
Memory (1 stick) 7-10
USB/FireWire Device (powered via port) 5-10
PCI Sound Card 5-10
Other PCI Cards (wireless card, ethernet, etc) 5
Floppy Drive 5
Case Fans 3
Keyboard and Mouse 6