Computer Power Consumption

Troubleshooting a PC Power Supply isn’t that difficult. Various PC parts will use either 3.3 volt, 5 volt, or 12 volt. The 3.3 and 5 volt leads usually power digital circuits, while the 12 volt leads provide power to fans and drives. The common form factor used in computers today is the ATX. This power supply has a single, twenty-pin connector.Some typical symptoms of a bad power supply include: Dead system, partially dead system, and random rebooting. If the PSU’s fan quits working, replace it immediately.

The diagram below indicates the approximate power consumption per device. Use this chart to determine what size power supply you should purchase. Keep in mind it’s always best to buy a quality name brand power supply that exceeds the wattage you’ll need to power your computer. A budget computer supply will only cause you problems.