System unit components

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 System Unit


System unit is a case that contains different electronic components of the computer used to process data. All computer systems have a system unit. System unit is made of plastic or metal to protect the components inside it. The system unit typically contains motherboard processer memory hard disk and other electronic components. 

 System units are available in different shapes and sizes. The system unit of a desktop computer stands vertically on the desk called tower model. Another type called all-in- one computer contains the system unit and the monitor in the same case. The system unit in the slate tablet in behind the display screen whereas the system unit in a convertible tablet is below the keyboard. 



Motherboard

Motherboard is a communication medium for the entire computer system. it is the main circuit board inside the system unit. it is also known as system board or main board. 

      some important computer on the motherboard are as follows;

Port                                 A connection point that is used to attach  peripheral devices to the motherboard.

Expansion Slot                A components located on the motherboard that enables you to connect an expansion card. 

Drive controller                It is a components of motherboard that provides drive interface. 

Memory Slot                     Memory slots on the motherboard hold memory modules.

CPU Socket                      It is used to hold the processer. 

Bus                                   The data flows between computer components via bus.

Central Processing Unit

CPU stands for central processing unit. It is the brain of the computer. it is the most important components of a computer. it is also called processor. A computer cannot work without CPU. All computer must have a central processing unit. 

All function of processor usually are on a single chip in personal computer. The manufacturing of processor chip are also providing multi- core processor. multi -core processing reduces access time and increases overall processing. For example if one core busy in executing an instruction another can handle  incoming data or instruction. it reduces energy consumption over multiple separate processors . Multi- core processor include dual- core quad-core/ six- core. AMD and intel offer multi-core processors. 

Two most common multi-core processors are as follows; 

  1. Dual-core Processor               A dual-core processor chip contains two separate processors.
  2. Quad- core processor             A quad-core processor chip contains four separate processors.
CPU consists of two main units knows as arithmetic & logical unit and control unit. These components work together to perform processing operations. 



         ALU Arithmetic and Logic unit

                              coming soon.......

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