It's crucial to purchase a power supply that matches or somewhat exceeds the power needs of your PC. Each component requires a certain amount of power. Using the chart at right, add up the power requirements of your PC's components, and then add another 30 percent for "wiggle room." Most systems will do fine with a 250- or 300-watt supply; there's no advantage in purchasing a supply with considerably more capacity than your system needs.
Please remember to take into consideration any USB devices you might be attaching to your system.
COMPONENT | TYPICAL WATTAGE |
| Processors | |
| Celeron 700 MHz Chip | 21 |
| 1 GHz Pentium III Chip | 33 |
| 1.7Gig Pentium IV chip | 65 |
| 1.4 GHz Athlon chip | 70 |
| SECONDARY STORAGE | |
| IDE Hard Drive | 15 |
| Floppy drive | 5 |
| ZIP drives | 10 |
| CD ROM | 10-25 |
| CD R/RW - DVD | 10-25 |
| Tape drive | 50 |
| Standard SCSI Hard Drive | 10-25 |
| 10K or 15K rpm SCSI H-Drive | 10-45 |
| OTHER | |
| Motherboard | 15-30 |
| Average PCI card (NIC etc) | 5 |
| Memory | 10 per 128MB |
| Graphics Card | 20-50 |
| Modem | 10 |
| Sound Card | 10 |
Reference[note: Edited by Awgeewhiz, Source by Jtmo]
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got feedback?by Awgeewhiz 
edited by dbmaven
last modified: 2003-09-05 11:09:54
