This supplies power (DC) for all the components in your computer.
applications you can
have open at once.
CPU stands for Central Processing Unit
the CPU has four primary functions:
Fetch, decode, execute and write back.
There are 3 types of Cores to the CPU,
these are Dual, Quad and Single Core.
The quad core is faster because there
is 4 processers sharing the same job,
Furthermore the quad core will also be
hotter because there is 4 of them. For
instance if I have got an i7 quad core
2.2Ghz it will be 8.8Ghz.
The heat sink helps the
CPU to cool down by
getting rid of excess heat
The motherboard holds all of the
components in place, the motherboard
goes inside the case.
NIC, Wireless NIC and Video
NIC stand for network interface card, the NIC
lets you connect to the internet via Ethernet
and the wireless NIC lets you connect to the
internet via wireless, and the video adapter
has all the important ports such as VGA,
headphone and microphone slots.
Hard Disk Drive
The hard disk drive
or HDD is where you
save your work, this
is also known as the
C: drive. This is
The optical drive lets you play
DVD’s CD’s and you can insert
disks such as installing a game, or
adobe Photoshop etc.
PATA or (Parallel Advanced
Technology Attachment) the PATA
drive is used to connect the HDD to
We don’t use floppy drives anymore,
because it didn’t hold enough memory
so now we have started to use the more
The external SATA ports
provide the same function but
for an external device. Most
external hard drives are
already formatted. You just
connect the data cable (as you
would if you were connecting a
Some of the external cables are, USB, mouse,
keyboard and VGA. These are all slots at the back
of the tower, you will need the mouse and
keyboard to actually use the computer and If you
wanted to connect a monitor you would use the