1) Central processing unit: The Central Processing Unit (CPU) performs the actual processing of data. The data it processes is obtained via the system bus, from the main memory. The results from the CPU are then sent back to main memory via the system bus. The CPU also controls and co-ordinates the operation of the other major components. CPU’s use in their operation: Fetch, decode, execute, and writeback.
Motherboard: The motherboard is a printed circuit board (PCB) that contains and controls the components that are responsible for processing data. A motherboard provides the electrical connections by which the other components of the system communicate it also contains the central processing unit and other subsystems such as real time clock, and some peripheral interfaces.
BIOS: The BIOS is a built-in software that determines what a computer can do without accessing any programs from a disk. On PCs, the BIOS contains all the code required to control the keyboard, display screen, disk drives, serial communications, and a number of other miscellaneous functions.
Power Supply: A power supply unit (PSU) is the component that supplies power to a computer. The power supply is vital as without it the computer will not be able to start. In a PC the power supply is the metal box usually found in a corner of the case. The power supply is visible from the back of many systems because it contains the power-cord holder and the cooling fan.
Heat Sink & Fan: A heat sink is designed to lower the temperature of an electronic device by releasing the heat into the surrounding air. All modern CPUs require a heat sink. Some also require a fan. A heat sink without a fan is called a passive heat sink; a heat sink with a fan is called an active heat sink. Heat sinks are generally made of an aluminium alloy and often have fins.
Hard Disk Drive, Master & Slave: The hard disk drive uses a mechanism that reads and writes data on a hard disk. Nearly every computer contains one or more hard disks. The purpose of the hard disk drives is that they give computers the ability to remember things when the power goes out. A typical desktop machine will have a hard disk with a capacity of between 10 and 40 gigabytes. Data is stored onto the disk in the form of files. A file is simply a named collection of bytes. The master (usually C:) is the primary drive, which the computer boots up using, the slave (D:) is the secondary drive which can be used for storing data or back ups.
Integrated Drive Electronics (IDE): The following devices Floppy drive, hard drive and the CD-ROM drive all connect to the computer through an Integrated Drive Electronics (IDE) interface. An IDE interface is a standard way for a storage device to connect to a computer.
Enhanced Integrated Drive Electronics
Briefly explain the functions of all the components inside the PC system unit
Function of the system unit
Function of the system unit