Computer Power Overview

Last modified on July 18th, 2010 at 7:50 pm


Every computer system has a power supply, so the CompTIA A+ professional needs to have a solid understanding of personal computer power supply characteristics and types. In this video, you’ll learn about the basics of electricity (i.e., amp, volt, watt), the type of connectors you can expect to see on a power supply, and the industry standards that are used to perfectly match your motherboard with your power supply.

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Category: CompTIA A+ Videos

Comments (4)

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  1. Lolo says:

    Working with electricity can be very dangerous. I took my time with this module and jotted down practically everything you said, especially about electricity.

  2. love the analogy of water pressure and voltage nice job! thank you!!

  3. David says:

    I noticed you omitted the capacitors inside the power supply. Full power will stay on the motherboard even if you disconnect the power cable. If the power button is pressed, even though the power cable is disconnected, the fans and cpu will come on for about 1/10th of a second. I recommend pushing the power button before any work is done inside the case to discharge the power supply so to prevent damage to parts. Also, I am not certain about this but if the capacitors are fully charged, touching the prongs where the plug is inserted on the outside can cause burns as well.

  4. David says:

    Did I mention that I love this presentation? I have been repairing computers for some time on my own and finally decided to get my certification. Most of the information I am already familiar with, but some detail I am not. Thank you for doing this and I will be going after as many certifications as I can qualify for; I will be at your site often while studying.

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