Ports in the back panel of mainboard

This post is lesson 23 of 42 in the subject Computer Hardware

Back panel is also known as rear panel. This panel located on back of Desktop case. Rear panel includes many connection ports such as PS/2, Serial, Parallel, USB, DVI, VGA, HDMI, etc. This article will help you learn all these connection ports.

Back Panel on mainboard

1. PS/2 port (PlayStation 2)

PS/2 port is used to connect mouse (green port) and keyboard (purple port) on mainboard. These two ports must be properly mounted, not interchangeable. The PS/2 port has 6 pins.

PS/2 port

2. Serial port

Serial port is a port used to connect peripheral devices to a computer such as a keyboard, mouse, scanner, etc. This port is also known as COM port. The serial port has 9 pins, rarely used now.

Serial port

3. Parallel port

Parallel port is used to connect peripheral devices, usually connect older printers. The parallel port has 25 pins, rarely used now.

Parallel port

4. VGA port (Video Graphics Array)

VGA port on mainboard is a port used to connect monitors, projectors, et. This port is usually blue and has 15 pins.

VGA port

5. HDMI port (High-Definition Multimedia Interface)

It is a port for connecting to projectors, has a higher resolution than VGA port. HDMI ports are usually black and have 19 pins.

HDMI port

6. DVI port (Digital Video Interface)

DVI port is used to transmit video signals to the monitor. These ports are usually white, have 24 pins with 5 analog pins.

DVI port

7. USB port (Universal Serial Bus)

USB is a general-purpose serial connection standard in computers, used to connect peripheral devices. There have been 4 generations of USB: USB 1.x, USB 2.0, USB 3.x and USB 4.0.

USB 2.0 ports are usually black, USB 3.x ports are usually blue. There are many types of USB such as USB type-A, type-A SuperSpeed, type-B, type-B SuperSpeed, type-C.

USB type A, type B, type C

8. RJ45 port (Registered Jack-45)

RJ45 is a connection port for transmitting network signals on computers. The RJ45 port has 8 pins.

RJ45 port

9. Audio port

Audio port used to connect to equipment that collects and processes audio signals.

Pink port: connect to micro.

Green port (Line out): output the signal to an amplifying device such as a speaker.

Blue port (Line in): receive signals to the computer for processing.

Audio port
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Posted by Vinh Le

Composer at ITLearningCorner.

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