Join Mike Meyers for an in-depth discussion in this video Choosing a power supply, part of CompTIA A+ Exam Prep (220-902) Part 2: Putting Pieces Together.
- Look, I hate to admit it, but I'm a cheapskate,…but there's certain areas where I do not scrimp.…Number one, peanut butter.…I like good peanut butter, and everybody knows…that Creamy Jif is the greatest peanut butter known to man.…Secondly, I don't scrimp on power supplies.…When you take a look at a couple of power supplies,…there's a reason why one power supply costs around 39 bucks…and the other one can cost almost $200.…The reasons for that has a lot more…to do than simply wattage.…Granted, this one has a lot more wattage than this one,…but this one comes with a lot of other stuff…that you need to be aware of when you're buying…your own power supply.…
The first big one is efficiency.…Power supplies do not take the voltage and the amps…and turn it in perfectly into watts.…There's because of heat and the mechanism…of the switching power supply,…there's always some waste.…Efficiency is measured as a percentage,…so a really good power supply, hint, hint,…is going to have efficiencies north of 90%,…where a not-so-good power supply, hint, hint,…
In Part 2, Mike Meyers helps you understand all the pieces that comprise the modern computer: RAM, power supplies, hard drives, and peripherals. Though 220-902 focuses on operating systems and software, a solid foundation in hardware will help you understand how all the pieces fit together. In Chapter 5, Mike shows how to build a basic PC, and install a fresh copy of Windows.
Details about the CompTIA A+ certification and the exam blueprints can be found at https://certification.comptia.org/certifications/a.
- Working with RAM
- Choosing a power supply
- Understanding portioning
- Implementing hard drives
- Configuring USB
- Building a PC
- Installing Windows