Power Supply Unit (PSU)

Correct Answer: Converting AC power to DC power

The primary function of a Power Supply Unit (PSU) in a computer system is converting AC power to DC power. This is the correct answer because:

1. Computers require DC power to operate internal components.
2. The power from wall outlets is typically AC power.
3. The PSU acts as a crucial intermediary, converting the incoming AC power to the necessary DC power for the computer's internal components.

The other options are incorrect:

Regulating CPU clock speed is not a function of the PSU. This is typically handled by the motherboard and BIOS/UEFI.

Managing data flow between RAM and storage is the responsibility of the CPU and chipset, not the PSU.

Controlling fan speeds for optimal cooling is usually managed by the motherboard or dedicated fan controllers, not the PSU. While some PSUs may have a fan, its primary purpose is not to control other system fans.

In summary, the PSU's main role is power conversion and distribution, ensuring that all components receive the appropriate DC voltage they need to function properly.

Correct Answer: Wattage

The most important factor to consider is wattage, as it determines how much power the PSU can supply to the desktop components. High-end gaming desktops usually require more power due to their components' demands. Other factors like brand, noise, and appearance are secondary considerations.

Correct Answer: Replace the PSU with one of higher wattage and better quality

Frequent unexpected shutdowns and restarts, especially during heavy usage, may indicate that the PSU is not providing enough power or is faulty. Replacing it with a higher wattage and better-quality PSU should resolve the issue. Other suggestions may help improve the system's performance, but they won't address the suspected PSU issue.