Chapter 4, Problem 2TC

Explanation of Solution

Given:

Three hard drives.

High end video card.

DVD drive.

To find: The reasonable wattage capacity for power supply when three hard drives, a high-end video card, and DVD drive are connected.

Solution:

High-end video card uses 300 Watts.

SATA hard drive takes 15-30 for all three types.

DVD drive takes 20-30 Watts.

The power will be:

$300+\left(30\times 3\right)+30=420$

The actual power consumption is more than the given directives for the hard drive. 30% more than the power supply mentioned is used. The extra 30% of power is used for compensating the shortage and to protect it from short circuit