The document discusses several key components of a computer's motherboard including the power supply, motherboard, CPU, northbridge, southbridge, and the three major cards (modem, sound, and video). It also covers the functions of RAM, ROM, and disk drives.

1. Internal unit
component
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about it!

2. POWER SUPPLY
• A power supply is an electrical supply that powers the computer
and all the components inside the computer

3. MOTHERBOARD
• The motherboard is a circuit board that holds all of the main
components together.
• Also on the motherboard is the Central Processing Unit (CPU)
which is the processor or brain of the computer.
• The CPU controls information and tells the other components
inside the computer what to do.
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4. SOUTH BRIDGE AND NORTH
BRIDGE (MOTHERBOARD
• The Northbridge connects directly to the processor via the front
side bus (FSB). A memory controller is located on the
Northbridge, which gives the CPU fast access to the memory. The
The southbridge is slower than the northbridge, and information
from the CPU has to go through the northbridge before
reaching the southbridge. Other busses connect the southbridge
to the PCI bus, the USB ports and the IDE or SATA hard disk
connections.
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5. WHAT ARE THE THREE MAJOR COMPONENTS
IN THE MOTHERBOARD?
• On the motherboard there are three major cards.
• The Modem card
• Sound card
• Video card
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6. WHAT DO THEY DO?
• The modem card is what handles internet connectivity.
• The sound card is what handles sound from the computer or
laptop.
• The Video card is what handles the Graphics on the computer.
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7. RAM
• RAM stands for Random Access Memory. The memory holds all
of the information of applications when the computer is turned
on.
• When you turn of the computer, all that information that was
stored in the memory will have gone.

8. ROM
• ROM stands for Read Only Memory. This is basically memory that
you can only read but when you turn off your computer, the
information will still be there.

9. DISK DRIVE
• A Disk Drive is what reads information that is stored on a disk.
• When you put a disc into a computer, the Disk Drive will read all
of the information and then you can use it for your own personal
use.
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10. DISC DRIVES (CONTINUED)
• There are multiple discs or other hardware that can read
information. They are:
• Floppy Drives
• CD-ROM
• DVD-ROM