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With increasing popularity of computer games and multimedia home PC users often need an unexpensive computer system upgrade By building a custom computer one is able to combine componenets and operating system to provide maximal gaming performanceComputers are often called number manipulators because of their ability to run millions of mathematical operations per second White 43 Computers use binary system of numbers which allows them to operate system of microscopic switches called transistors found inside of computer chips Binary system is defined as counting system that uses two digits one and zero Gookin 49 A transistor is a basic building block of microchips transistors are combined in formations called logic gates White 39 Transistor can only create binary information one if current passes through or zero if current does not to work with transistorsWhite 39 Computer software uses Boolean logic which is based on selecting true or false values used in computer programming White 39 All personal computers have BIOS which is an acronym for Basic Input Output System The BIOS runs every time the computer is started and it basically tells the computer how to act White 19 The BIOS is a part of the boot up process or a complex set of operations checking hardware that components are working properly Besides BIOS and several other operations there is poweron self-test - POST being ran POST test runs at the start up and if it finds an error it sends a warning message White 5 Central processing unit CPU is the most important part of the personal computer all other components work as a bridge to CPU White 59 The speed of the processor is usually defined by using units called megahertz MHz also million frequency waves per second CPUs are generally divided into two categories- CISC and RISC CISC complex instruction set computing uses many small instructions to carry out a single operations CISC is a standard in todays processors RISC reduced instruction
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