The motherboard connects all computer components and contains the CPU. The CPU carries out program instructions by performing basic arithmetic and input/output operations. The RAM sends instructions to the CPU on how to access programs and communicates with the CPU to retrieve data from the hard drive when the computer turns on. A power supply provides low voltage power to internal computer components to operate. A heat sink cools the CPU by dissipating heat with a fan.

1. A motherboard provides the electrical
connections with each component to let
them talk with each other. It also contains
the central processing unit and hosts
other devices.
CPU (or central processing unit) is the
hardware within a computer that carries
out the instructions of a computer
program by performing the basic
arithmetical and input/output operations
of the system. The RAM send instruction
to the CPU of how to get to programs.
A power supply unit (PSU) convers main
power to low voltage for the internal
components of a computer to work.
A heat sink is a passive heat exchanger
that cools a device by dissipating heat
into the surrounding area. Heat sinks
are used with the fan to cool CPUs or
graphics processors. The heat sink is
housed on the motherboard over the
CPU.
Random-access memory (RAM) is a form of computer data storage.
RAM allows data items to be read and written in the same amount of
time no matter what. Ram has volatile memory so everything recorded
on it is lost once the computer is turned off. The RAM communicates
with the CPU helping it get to programs. When the computer is turned
on the ram gets the data from the hard drive and relays that information
to the CPU.
A hard drive is a storage
device used for storing and
retrieving digital information.
A CD/DVD drive is a disk drive that uses laser
light as part of the process of reading or writing
data to or from optical disks. CD and DVD
drives, like other hardware, need drivers to
communicate with the computer.
A Graphics card is a computer card which
generates an output display of images onto a
screen. Most graphics card now are
automatically integrated with a computer. The
graphics card has to communicate with the
screen to display graphics.
The SATA cables connect
the cd/dvd drive to the
motherboard

2. A Mouse is a pointing device that detects motion
relative to a surface. The mouse has to communicate
with the monitor to show where the mouse is going
and what you have clicked.
In computing a keyboard is a typing device which uses
arranged buttons or keys to act as switches to place
something on the screen. They Keyboard will also have to
communicate with the screen and the CPU on what key
has been pressed, where it has been pressed and how
long it is held down.
A Printer is a peripheral which scans what’s on the
screen and prints it onto paper in colour or black and
white. The printer is usually plugged into a socked and
either connected by a USB to a computer or
connected wirelessly.
A computer monitor is a display
devise for computers. It will have to
communicate with the RAM and
hard drive to display programs and
it will also communicate with the
keyboard and mouse to display
different images.