Clock Speed 3
Clock Speed 3 : Inside the Central Processing Unit (CPU) there is a 'clock' - the CPU clock 'ticks' by switching from high to low and then back again in a very precise time: Every time the clock pulses an instruction is carried out: Clock speed is measured in pulses per second. Since "1 pulse per second" is also known as 1 Hertz computer speed is often specified in 'Gigahertz' (GHz). The CPU clock speed on personal computers runs from less than 1GHz to about 3.8GHz. This means that the machine can carry out a billon instructions per second when running at 1GHz. If it runs at 3.8GHz then three point eight billon instructions per second could be carried out. Although it may seem that the computer is doing several things at once, in reality the computer is just doing one thing at a time
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