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Clock speed is measured in gigahertz

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Clock speed is measured in gigahertz (GHz). For example, a CPU

running at 4GHz (four thousand million hertz, or cycles, per sec-

ond) will enable your PC to handle the most demanding applica-

tions.

The main circuit board inside your system is called the moth-

erboard and contains the processor, the memory chips, expansions

slots, and controllers for peripherals, connected by buses – electri-

cal channels which allow devices inside the computer to com-

municate with each other.

The CPU has an internal bus for com-

munication with the internal cache memory, called the backside

bus. The main bus for data transfer to and from the CPU, memory,

chipset, and AGP socket is called the front-side bus.

The size of a bus, called bus width, determines how much da-

ta can be transmitted. It can be compared to the number of lanes on

a motorway – the larger the width, the more data can travel along

the bus. For example, a 64-bit bus can transmit 64 bits of data.

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