Hardware

Hardware

1. CPU- CENTRAL PROCESSING UNIT.

   • KNOW AS THE BRAIN OF THE COMPUTER BUT DOESNT THINK
   • THE CPU DOES A CYCLE ( Fetch-Decode-Execute )
   • The CPU consists of integrated circuits in the microprocessor of a computer.
   • The CPU is responsible for processing information and controlling the computer.
   • In the CPU are the control unit , which manages the execution of the instructions, and the ALU , which performs mathematical and logical computations.
   • In the CPU are storage locations called registers
   • One of these is the program counter which contains the location of the current instruction.
   • The CPU communicates with other components such as memory through bundles of signal wires called buses
   • contains the control unit, ALU and cache memory.

2. CLOCK SPEED

   • Fetch-Decode-Execute cycle
     • the cpu runs faster
     • the CPU produces more heat
     • the lifetime of the CPUmaybe reduced
     • Fetch: retrieves information from the main memory
       • decode: works out what needs to be done
         • execute : carries out an instruction
   • ALU
     • Arithmetic logic unit
     • preforms arithmetic and logic functions
   • clock chip--a device inside the computer that controls the timing of signals by sending out pulses
   • clock speed is measured in hertz
   • over clocking--make the computer operate faster than the frequency specified by the manufacter
   • cache memory
     • It is an area of memory that can be accessed quickly by the CPU.
     • It is used to store regularly used items so they can be loaded faster.
     • Your web browsers save web pages here when you open them for the first time.

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