computer performances

computer performances

1. Clock speed

   • The clock speed is measured in GHz
     • A hertz is cycles per second
   • Clock speed is the rate at which a processor can complete a processing cycle. It is typically measured in megahertz or gigahertz. One megahertz is equal to one million cycles per second, while one gigahertz equals one billion cycles per second.
     • how
       • A faster CPU uses more energy and creates more heat. A computer will normally have a maximum clock speed set by default, but it is possible to change this speed in the computer BIOS . Some people increase a CPU clock speed to try to make their computer run faster - this is called overclocking.

2. cache

   • A cache -- pronounced CASH -- is hardware or software that is used to store something, usually data, temporarily in a computing environment. ... Cache is frequently used by cache clients, such as the CPU, applications, web browsers or operating systems (OSes).
   • it is used to acsess data from the main memory.
   • how
     • The more cache there is, the more data can be stored closer to the CPU. Cache memory is beneficial because: Cache memory holds frequently used instructions/data which the processor may require next and it is faster access memory than RAM, since it is on the same chip as the processor.