CompTIA A+ Certification Core 1 (220-1101) - Choosing a Power Supply

The video tutorial explains the concept of watts, volts, and amps, emphasizing that real-world power supplies are not perfectly efficient. It discusses how to determine the appropriate wattage for a computer system, highlighting the use of online calculators. The tutorial also covers the importance of the 80 Plus rating system for power supply efficiency and compares modular and soldered power supplies. Finally, it addresses the standard ATX power supply sizes and their compatibility with different system sizes.

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