IT's All About

IT Infrastructure – The Computer Hardware

Posted: September 14th 2012

In the Computer, there are two main components there is, CPU (Central Processing Unit) or can also called Processor, and Memory. The CPU have a function to carries the information, process it, and carries out to be taken by the systems. The Memory have a function to temporarily holding place for data and instruction before the data and instruction being processed.

These are some components inside microprocessor :

  • Control Unit (CU)
  • Arithmatic-Logic Unit (ALU)
  • Registers
  • Primary Storage
  1. Control unit have a function such as, translating the instruction and control the data flow.
  2. ALU have a function as a worker. If the CU translating the instruction, ALU has a job as a worker to do that translated instruction.
  3. Register have a part as a close data storage (memory), but it has a small capacity (2MB, 4MB,….)
  4. Primary Storage saves the instruction, it  is fast because it’s location close to the CPU.More larger the primary storage capacity, more faster the CPU.

Memory :

is an electronic components that store instruction, data, and result. Each storage have an address to simplify the process on the CPU

Primary Storage : is a temporary storage to hold an Information, application software, and operating system.  Type of Primary Storage

  • Register
  • Random Access Memory (RAM) : Memory chips on motherboard, storage of program instruction and data. Volatile (data lost when the power is off)
  • Read Only Memory (ROM) : Permanently saved, but capable to modify. Usually save the BIOS data. ROM is non-volatile.
  • Cache : intermediary between primary storage and secondary storage. Cache memory has a small capacity (MB)

Secondary Storage is a nonvolatile memory that can be erased electronically and reprogrammed, huge capacity (GB until TB), cheaper but slower than primary storage.

Common components of CPU’s are, microprocessor / processor, Memory, Adapter Card, Ports, and Drive bay. All of that components are connected with motherboard which have a function as the mother of the CPU’s that integrating the components to process the instruction / input and then being sent to the output systems.

The adapter Card

  • VGA (Video Graphic Accelerator) Card
  • Internal Modem
  • Network Card
  • Sound Card

Those card are additional for the needs of computer this day, because all of the function is available on the motherboard now. It’s just necessary if the users want a higher performance.

The Input

  • Keyboard & Mouse
  • Optical Drive, Floppy Disk, Zip Drive
  • Scanner

The Output

  • Monitor
  • Printer
  • Optical Drive, Floppy Disk, Zip Drive
  • Speakers


  • Power Supply ( Urgently Needed for Power Management)
  • Cpu’s Fan ( to control the temperature of the Processor)

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