Parts of A Computer Case (Part 2) - Back of The Computer Case

PARTS OF A COMPUTER
CASE (PART 2) – BACK OF

THE COMPUTER CASE
Alfred Mujah Jimmy

COMPUTER NETWORK SERVICES YAHOS SCHOOL OF SKILLS – KUCHING, MALAYSIA
EXPLANATION
In this explanation which will be published here on Word, users like us will
learn about the further parts and ports at the back of the computer case,
the functions of these parts, the suitability of these parts and
compartments, the definitions of these parts, and the types of these parts
and compartments that are built on the back of the computer casing.
On the back of the computer casing, there more parts and compartments
that are built-in and these are also included the external motherboard,
where the ports are made are arranged accordingly into one external
motherboard at the back of the case.
Parts of the rear computer case explained
At the rear of a computer case, that is the desktop case, here are some
parts that users shall know even further when it comes to connect ports,
plugs and other peripherals into the desktop computer. These are:
1. Power supply unit

• A power supply unit is
a connected
compartment that
converts mains AC to
low-voltage regulated
DC power for the
internal components of
a computer. Modern personal computers universally use
switched-mode power supplies. Some power supplies have a
manual switch for selecting input voltage, while others
automatically adapt to the mains voltage. It contains a chassis
vent, a kettle plugs port and a I-O (On/Off) button.
2. Chassis fan
• The chassis fan, also known
as the case fan or computer
fan, is a small fan, located
inside the computer, and is
attached to the front or back
of the computer case.
Chassis fans help to bring
cooler air into and blow hot
air out of the case. It is
fenced by its ventilation
holes pre-made attached on the power supply unit. They are
available in a wide variety of sizes depending on the size of
the ventilation hole and the power supply unit.
3. Expansion card
• In computing,
an extension
card is a
printed circuit
board that can
be inserted
into an
electrical
connector, or
expansion slot
on a computer’s motherboard to add functionality to a
computer system. On the back wall of the card there are
types of ports serve as the plug-in for connectors such as
ethernet ports, USB ports, and so on.
4. Free expansion card
• The free expansion
cards are an
expansion of printed
circuit boards that
included three or
more ports of
various types, which
is only found on
large desktop tower
computers such as
Full Tower and
Super Tower as
such.
5. USB 2.1 port
• The USB 2.1A port is the 2.1A-current USB port
that provides the plug-in charging for all
peripherals connected to the computer, and it
served as the main port for providing
connections for keyboards, mice, other gaming
devices, hard disk drives that used the USB Type
A plug as the connecting port and receptacle on
the computer case, and portable flash drives and
WIFI dongle drives as such.
6. PS/2 Mouse and Keyboard ports
• The PS/2 Mouse and Keyboard ports are the
series of round-
shaped, holed and
edged ports that
served as the jack for
the connection of the
keyboard and mouse
respectively into the
computer. It is colour-
coded according to
the assignment of the
connector’s colours: Purple or lavender for keyboards, while
teal or green for mice, and is located at the left side of the
circuit board’s face.
7. DVI Port
• The DVI port or the Digital
Video Interface port is a
typical port that connects
the LCD monitor to the
computer’s video graphic
card. It is located at the left hand of the PS/2 port.
8. VGA Port
• The VGA Port is a typical port and
standard connector used to plugged
computer video output when connected
from the monitor. It is made of blue holes
and a thinner stainless steel edge, and it is located at the top
right of the extension card, right after the PS/2 ports.
9. HDMI Port
• The HDMI port is the
typical port in the
form of a female
connector, designed
to provide the plug-
in for the HDMI
cable to be
connected to the computer. It is located right after the USB
ports on the left of the exterior of the expansion card.
10. USB 3.1 Type C port
• The USB 3.1 Type C
port is a small type of
port, rounded
oblong-shaped and
specialised for the
connections of the
USB Type C plugs
into the computer, at
the back of the
casing. It is only found on newer desktop computers
manufactured since the late-2010s, and it can only accept the
peripherals that uses the Type C USB plugs and ports such as
smartphones and tablets.
11. USB 3.1 Gen 1
• The USB 3.1 Gen 1 port is a type of USB port that supports the
speed of up to 5GB per second via the connection of plugs
and connectors up to Type C (including newer versions of
Type A, Micro B and Mini B plugs) into the back of computer
cases of newer models and releases.
12. USB 3.1 Gen 2
• The USB 3.1 Gen 2 port
is the typical USB port
that supports the
interface options of up
into Type C plugs such as Type A, MicroUSB and other
compatible USB plugs and connectors, with an extra transfer
speed of up into 10GB per second. Its ports, located at the
back of the casing, only supports the most recent advanced
USB technology that supports Type A plugs, while newer
models are equipped with new Type C ports, only on the front
of casings of newer types and manufactures.
13. LAN port
• The LAN port or the ethernet port, is the
networking port that
provides for the
plug-in of ethernet
network cables to
the computer at the
back of the casing. It
is connected from the ethernet switch to
the ethernet port located at the top of
USB ports and it is located at the top
right of the face wall of the expansion card.
14. Audio plugs
• The audio plugs
were the group
of three small,
rounded plugs
that provide
respective plug-
ins for audio and
video jacks such
as headphone jacks, microphone jacks, loudspeaker jacks
and so much more. It has three different edged plugs that
defined by colour codes: pink for microphones, green for line-
in and blue for line-out, and it is located at the right of VGA
ports on the face of the motherboard.
15.USB 3.1 Gen 1
• The USB 3.1 Gen 1 port is a type of USB port that supports the
speed of up to 5GB per second via the connection of plugs
and connectors up to Type C (including newer versions of
Type A, Micro B and Mini B plugs) into the back of computer
cases of newer models and releases.
16.USB 3.1 Gen 2
• The USB 3.1 Gen 2 port is the typical USB port that supports
the interface options of up into Type C plugs such as Type A,
MicroUSB and other compatible USB plugs and connectors,
with an extra transfer speed of up into 10GB per second. Its
ports, located at the back of the casing, only supports the
most recent advanced USB technology that supports Type A
plugs, while newer models are equipped with new Type C
ports, only on the front of casings of newer types and
manufactures.
17.

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PARTS OF A COMPUTER

CASE (PART 2) – BACK OF

Alfred Mujah Jimmy

1. Power supply unit

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