All About Computer Cases!
All computers have computer cases, and you know what they generally
look like, right?
You can customize or modify your own, or you can
buy some really cool ones that are available on the web.
Here is a general description of what your case should
look for if you are buying a computer case...
The computer-case is like a metal box, in which all
the parts of your computer are kept. This box has a front and a
back panel.
On the front panel you can see the CD ROM drive (some
cases have more than one place for the CD ROM drives, because some
people prefer to have more than one drive on their PCs), the floppy
drive, the reset switch and the power switch. If you have seen a
few older cases, you have surely seen a small display, showing the
speed of the CPU (or the processor), measured in MHz.
On the back panel of (almost) all computer cases
are ports and connectors needed for the peripheral devices.
you can also see the fan and slots for cards, such
as the sound card, the video card, and the network card. The ports,
that are placed there are printer port and the serial ports.
The connectors are the keyboard and the mouse connectors
and the power connectors. The exact locations of many of these items
vary somewhat from computer to computer, but the overall layout
is generally the same.
Types of computer cases fit AT and ATX sizes. If
you want a modern computer, you will want, or should have an ATX
case. The AT or ATX version refers to the type of motherboard
the case is designed to fit. The AT case is for the old type
of motherboards such as for the 80486 microprocessor based computers.
There are two basic styles of computer cases
the computer may come assembled in. They are basically tower and
desktop style computer cases. Desktop style is in the shape of a
rectangular box which is sits flat on the desk. Usually the computer
monitor is placed on top of it.
A tower computer case looks similar to a tower as
the name implies. These computers will be placed off to the side
of the keyboard and monitor. The tower case is the most popular
style of desktop computer today. It is also recommended by some
microprocessor manufacturers since it can be designed for better
heat dissipation.
There are three different sizes of the tower computer
cases. These are the Mini-tower, which is the smallest computer
case. Next comes the Mid-tower, or the standard size. It's recommended
for most applications including standard desktop systems and some
servers.
The next tower computer case is the Full-tower. It
is the largest of all towers. Usually this is a very tall computer
case and you may have a difficult time fitting it where overhead
is limited. This case is usually used for high powered servers.
Let's get back to ports and the connectors on
the back panel of computer cases. There are a few important
things to say about them. As it was said before, the back panel
of computer cases have power connectors. There are two of them.
One is to connect your computer to the wall outlet,
and the other can be used to connect the monitor power to operate
from the socket on the back of the case. Usually the power connector
for the monitor is not used since many use a power strip or a surge
protector to control the power to all devices.
Now, let's say a few more things about the keyboard
and mouse connecters. On new computers, there are both normal connectors
–PS2.
There are two sizes of PS2 connectors. Normally with today's equipment
you will want the smaller PS2 connector on your keyboard. Mice don't
come with the larger PS2 connector. There are adapters made to allow
smaller connectors to adjust to a larger sockets and vice-versa.
A PS2 connector is a round connector with 6 pins and a plastic key.
The keyboard always uses the PS2 connector; however
the mouse may be a serial mouse and may plug into the serial cable
on your computer. With modern computers, normally a PS2 mouse will
be used.
Near the keyboard and mouse connectors is normally
a connector for a parallel printer. This is what is called a parallel
device, meaning that more than one line carries data in one direction
at a time. This is the connector you will plug your parallel printer
into. See your computers motherboard or owner's manual if you want
to know the exact placement of these connectors.
A little below, you can see the two serial connectors.
There are two types of serial connectors, which are called DB9 and
DB25. One type, DB9 contains 9 pins or sockets and the other contains
25 pins or sockets. You may have any combination of the 9 or 25
pin connectors. Also some are female style connectors, and others
are male. You will need to make sure your connectors match for
their given types. The serial cables are normally used to connect
a serial mouse, an external modem, or some other device to your
computer.
And now, let's finish our article with a few final
words about the slots for the cards. Card slots are covered by a
metal plate on the back panel of comper cases. This is where
the additional cards are plugged into your system. These cards
are usually a video card, a sound card, internal modem, and one
or more network cards. Your monitor connector would plug into a
connector on your video card, and your speakers will plug into a
connector on your sound card. See your sound card and video card
manual for exact placement of these connectors on the card. These
cards are plugged into the motherboard and you must open your case
up to remove or add one of these cards.
Finally, we have reached the end of this article,
which has only one purpose -to give you useful and interesting information
about computer cases.
You surely know that computer cases vary not only
in manufacturers, but in the outer appearance and design. There
are some really strange and attractive cases, such as lighted PC
cases; cases, which are made of plexiglass (in order to be seen
the insides of the computer), and many, many other variations.
All you have to do is choose the PC case that suits
you most and to buy it! Good luck!