Computer System Unit (E-Learning)

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Computer in the Learning Environment
SYSTEM UNIT
Prepared by Danica Mae D. Orobia BBTE ITE 3-2N
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SYSTEM UNIT

• A case that contains the electronic components of
  the computer used to process data.
• The case of the system unit, or chassis, is made
  of metal or plastic and protects the electrical
  components inside.

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• Also called the system board, is the main circuit
  board of the system unit.
• Many electronic components attach to the
  motherboard and others are built into it.

MOTHERBOARD
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• Also called the central processing unit (CPU),
  interprets and carries out the basic instructions
  that operate a computer.
• Impacts overall computing power and manages most
  of the computers operations.

PROCESSOR
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• Memory consists of electronic components that
  store instructions waiting to be executed by the
  processor, data needed by those instructions, and
  the results of processing the information.
• There are 2 types of memory, Volatile is
  temporary and nonvolatile is permanent memory.

MEMORY
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• Types of Memory
• Volatile memory Memory that loses its contents
  when the power is turned off.
• ? RAM
• Nonvolatile memory Memory that does not lose its
  contents when the power is turned off.
• ? ROM, flash memory, and CMOS

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MEMORY SIZES

• Kilobyte (KB OR K) is equal to exactly 1,024
  bytes.
• Megabyte (MB) is equal to about one million
  bytes.
• Gigabyte (GB) is equal to about one billion
  bytes.
• Terabyte (TB) is equal to approximately one
  trillion bytes.

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• Information is stored on the hard drive
  magnetically and the capacity of the device is
  usually measured in Megabytes, Gigabytes or
  Terabytes.
• It is also be attached to a computer via USB
  ports to increase the available storage space.

Hard Disk Drive Storage (HDD)

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• It allows removable magnetic disks to be used to
  store information.
• It is useful for transporting programs and data
  to or from the computer. However, the limited
  capacity of the disks (1.2MBytes) means that
  these are mostly obsolete and replaced by memory
  sticks.

Floppy Disk Drive (FDD)
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• A DVD drive allows removable optical discs to be
  used to store information.
• Data is written and read on optical discs using a
  laser.

Optical Drive (CD/DVD)
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• A port is the point at which a peripheral
  attaches/ communicates with a system unit so that
  the peripheral can send data to the computer.

PORT
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BUSES

• Buses are used to transfer bits from input
  devices to memory, from memory to the processor,
  from the processor to memory, and from memory to
  output/storage devices.

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• Bays
• A bay is an opening inside the system unit in
  which you can install additional equipment.
• A drive bay is a rectangular opening that
  typically holds disk drives.
• An external bay allows a user to access openings
  in the bay from outside the system unit, like
  optical disc drives.

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• A power supply is the component of the system
  unit that converts the wall outlet AC power into
  the DC power.
• AC adapter is an external power supply. An
  example would be a cable modem, speakers, or a
  printer.

POWER SUPPLY
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THANK YOU !FOR LISTENING GODBLESS