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1.1.4 Computer Performance

1.1.4.1 Know some of the factors that impact on a computer’s performance, such as: CPU speed,

RAM size, the number of applications running.

Factors affecting performance

·         Factors affecting overall computer speed include:

CPU Clock speed : The computer clock speed governs how fast the CPU will run. The higher the clock speed the faster the computer will work for you. The clock speed is given in megahertz (MHz). The original IBM PC ran at 4.77 MHz whereas modern PCs will run at over 2000 MHz, which gives you an idea of how far things have progressed since the introduction of the original PC. The higher the MHz speed the faster the computer.

Comparing computer types

Mainframe

·         Capacity: Very powerful computers often connected to many individual PCs over a network.

·         Speed: Much faster than PCs used for processing large amounts of data such as mail-shots, salaries, tax etc.

·         Costs: Very, very expensive, only affordable by large companies.