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Thread: system clock/real time clock?

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    system clock/real time clock?

    can anyone explain what the difference is between the system clock and the real time clock?

    thanks

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    Real time is GMT (Or wherever you are in the world) and the system clock is literally the clock according to the system bios and Windows

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    i've just had this posted on another forum


    answer taken straight from uni exam paper:

    "The system clock is an oscillator connected to the cpu and controlled by a quartz crystal whose function is to provide timing signals to synchronise control operations in the microprocessor-based system. It's frequency defines the execution speed of the cpu since each instruction takes a certain number of clock cycles to complete. A real time clock is an integrated circuit used to keep track of time and date that is present in most microcomputers. It usually has a back-up battery so that it continues to operate even when the mains supply is switched off."


    i think that explains it

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