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.

What is the relationship between volts, amps, and watts in a perfect world?

• Volts plus amps equals watts

• Amps divided by volts equals watts

• Volts times amps equals watts

• Volts divided by amps equals watts

Why is it difficult to determine the exact wattage needed for a computer system?

• Because wattage calculators are inaccurate

• Because all systems require the same wattage

• Because it depends on the specific components used

• Because wattage is not important for computers

What is the main purpose of the 80 Plus rating system?

• To make power supplies more colorful

• To ensure power supplies are cheaper

• To guarantee a minimum efficiency level

• To increase the size of power supplies

Which of the following is NOT a type of 80 Plus efficiency rating?

• Diamond

• Silver

• Titanium

• Bronze

What is a potential downside of using modular power supplies?

• They are less efficient than soldered connections

• They are more expensive than soldered connections

• They are harder to install than soldered connections

• They are not compatible with ATX systems

What is the standard size that covers most computer systems?

• Micro ATX

• ATX

• Mini ITX

• Nano ATX

Why might someone choose a smaller ATX power supply?

• To improve the system's cooling efficiency

• To save on electricity costs

• For use in very small form factor systems

• To increase the system's processing power