Computer Hardware Guide

Ever wanted to know what is inside your PC or Apple Mac? Listed below is a brief summary of what the major components in a computer do.




The CPU or processor is the brain of the computer. It performs all the operations that the computer does. So, the faster the speed of your processor, the faster your computer will run.



Temporarily stores your activities on the computer.

The more memory you have the more activities can be stored. In other words you can have more activities and programs running at the same time and the quicker everything will be.

Hard Disk

Hard Disk


The hard disk drive, is where all data and programs are stored in your computer permanently. The larger the hard disk the more data can be stored.

Faster hard drives allow you to access this data faster.



The motherboard (also known as a logic board) is where all the other devices in your computer such as the processor, memory, hard disk, and CD/DVD drives are connected. It links all the devices together.

Power supply

Power Supply

A Power Supply sends power to all of the other hardware so they can operate.

Graphics Card


A Video Card is the part of a computer system that processes the image you see, from computer code to a TV/Monitor signal.

A good powerful graphics is essential for playing modern games.

Sound Card


Processes audio data to an audio signal that can be transferred to speakers.

New models provide up to 7.1 surround sound audio.


Network Card

Network Card

Allows the connection of your computer to a network to communicate with other computers or connect to the internet. Comes in 3 speeds, 10Mbps, 100Mbps and 1000 Mbps.

The fastest current internet speeds in the UK are 50Mbps.

Wireless Card


Performs the same job as a Network card, but done over a wireless interface. Fastest speeds are currently 300Mbps


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