Computer Hardware and Servicing

System Unit Components play a significant role in performing functional testing, system checking, load testing or other quality control types takes notice of the system unit components.This article includes definition of 6 main system unit components and description of their functions. This information is necessary for performing many types of testing.

• doing repairs and maintenance to the physical components of a computer and its peripherals including fans, hardrives, keyboards and printers.

• In a nutshell, system unit components allow us to work properly with computer. One may determine six main system unit components:

• Motherboard – core of the system. Literally, it is a hub of the computer. It is also called the system board or main board. All other components are linked to it one way or another. This part includes all the controllers managing all the standard peripheral devices, such as mouse, keyboard, the display screen and the disk drive.

• Processor – a small chip located inside the computer. It is also called a Central Processing Unit (CPU). It is an integrated circuit accepting coded instructions for execution. Processors can be with pins or pinless.

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• RAM is the main memory of the computer system whose main function is to store data temporary. It allows data to be accessed easily by the CPU based on the fact that data is accessed randomly (in no specific order). It also speeds up the computer’s operations because of its ability to allow random access to data. The bigger(not in physical shape but in capacity) the RAM, the faster the access to data by the CPU.

• Hard Drive – internally installed archival storage memory. It is a place where all files and folders are located. It contains a stack of discs placed inside a solid encasement. They spin extremely fast so that data could be read from any place on the drive.

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• Video Card (Graphics Adapter) – expansion card connected to the computer motherboard and displaying the computer outputs on the screen. Modern Video Cards support HDMI (High Definition Multimedia Interface) VGA (Video Graphics Array) and DVI (Digital Visual Interface).

Power Supply – electrical device providing every part of a computer with electrical power.