The two name features of CPUs that you need to be aware of are its speed and type.
The processor speeds of most of today’s PCs are measured in GHz (GigaHertz). 1 GHZ means that it can execute approximately 1 billion instructions per section.
The CPU type determine the type of application for which a particular type of processor is used. The two most popular companies that currently produce CPUs are Intel and AMD but are also manufactured by Centaur Technology, Tlbrus and Transmeta Corporation. Intel processors are little more expensive than AMD’s due to the small difference in performance.
Main Memory
The capacity of a computer’s memory determines the number of programs that it can hold at a time, which affects the performance of a computer system. More memory indicates that it can hold more programs at a time. Modern PCs memory capacity is measured in GB (Gigabytes).
There are two main types of RAM – SDRAM (Synchronous Dynamic RAM) and RDRAM (Rambus Dynamic RAM). RDRAM are faster and more expensive than SDRAM abd are used mainly for high performance computers.
Wordsize determines the number of bits that can be stored and processed at a time by the CPU. Most modern PCs have a word size of either 32-bit of 64-bit.
RAM speed determines how fast the chip updates the data that it contains. In modern PCs it is measured in MHz (MegaHertz) and is usually above 400MHz.
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