10 Internal parts of a PC
Created by
Federica Proietti Cesaretti
INTERNAL PARTS OF A
PERSONAL COMPUTER
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Scanner
CPU (microprocessor)
Primary storage (RAM)
Expansion cards (graphics cards
etc)
Power supply
Optical disc drive
Secondary storage (Hard drive)
Motherboard
Speakers
Monitor
System software
Application software
Keyboard
Mouse
External hard disk
Printer
CPU: central processing unit
• CPU stands for central processing unit. The
CPU is the brains of the computer where
most calculations take place.
CPU
CPU
• The CPU is composed of five basic components:
RAM, registers, buses, the ALU, and the Control
Unit.
RAM
• Ram stands for random access memory, a
computer memory. RAM is considered
"random access“ memory because you can
directly access any memory cell. RAM memory
stays there as long as you don’t turn off the
computer. You always need to save your files
before turn off the computer otherwise you
lose it
RAM
• If you add more RAM usually your
computer works faster.
REGISTERS
• A register is a small storage which is part of a
CPU.
• All mathematical information must be
represented in a register before it can be
processed. For example, if two numbers are to
be multiplied or added, both numbers must
be into registers, and the result is also
registered there.
BUSSES
• Busses are a collection of wires through which
information is transmitted from one part of to
another part of the computer
busses
ALU
• ALU stands for Arithmetic Logic Unit; ALU is
another component in the CPU. The ALU
performs mathematical and logical operations
in the computer. The new information is sent
to the computer memory.
CONTROL UNIT
• The control unit coordinates the input and
output devices of a personal computer. It
directs the operations by providing time and
control signals.
PCB printed circuit board
• PCB stands for “printed circuit board”
where you can find chips and other
electronic components. Computers has
one or more boards, for example:
Motherboard, daughterboard, expansion
board, network interface card (NIC)
MOTHERBOARD
• In modern computers, the motherboard is the
central Printed circuit board (PCB) and holds
many important components of the system.
The motherboard is also known as the main
board or system board.
MOTHERBOARD
• Motherboard connects the CPU, the main
memory and other important components,
such as video and sound controllers
Laptop
motherboard
HARD DRIVE
• The hard drive`s responsibility is to store data.
Documents, pictures, music, videos,
programs, and even the operating system are
permanently saved on the computer’s hard
drive.
HARD DRIVE
• A hard drive uses similar memory storage
technology to cassette tapes and video tapes.
• A single hard disk usually is made of several
disks. Each disk needs two read/write heads.
One head needs to read the saved data and
one head need to write the new information
to save in the hard drive. All the read/write
heads are attached to a single little arm so
that they spin all at the same time.
HARD DRIVE
GRAPHIC CARD
• The graphics card is located on the
motherboard; it is able to gather the
information from the CPU and then translate
it to an image.
GRAPHIC CARD