Join Mike Meyers for an in-depth discussion in this video The power supply, part of CompTIA A+ Exam Prep (220-901) Part 2: Core Hardware.
So, let's take a quick tour of a typical ATX power supply.…I've got an ATX power supply in front of me.…First thing I want you to notice…is that ATX power supplies are all in watts.…So, this is, it's in really small print…but it says 575 watts.…Keep in mind that that's a maximum power,…it doesn't mean it's continually pulling 575 watts,…that could get pretty expensive if it did.…ATX power supplies use soft power.…What that means is that your power…isn't by a physical switch on the power supply.…
What we do is we have a jumper…that's set on the motherboard itself…and then that's a power switch.…So, it's really more of a program button…and we can set that switch to do different things.…For example, we can have your computer…just go into sleep mode if we wanted to.…So, as we go around this guy...…So, there's no on off switch.…Well, there is in the back here…but this is more like a cutoff switch.…And that's rarely, if ever, turned off.…Here's our power input…for our power receptacle.…And, right here is our dual voltage.…
The CompTIA A+ 220-901 exam is comprised of six key parts. The second, core hardware, is covered by this course. Instructor Mike Meyers explains the essential components and functions of motherboards, power supplies, and hard drives. He also shows you how to work with chipsets, troubleshoot electrical issues, implement RAID, and how to determine which hard drive technology to use depending on the circumstance.
Note: The six courses designed for the CompTIA A+ (220-901) exam preparation include core processing, core hardware, peripherals and building a PC, displays and printers, networking, and laptops and mobile devices.
- Working with motherboards, chipsets, and expansions
- Choosing a power supply
- Evaluating hard drive technologies
- Implementing RAID
- Troubleshooting issues