(Computer Studies and Computing) |
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Comparison Between CISC and RISC
| CISC Computer | RISC Computer |
|---|---|
| The acronym is variously used. If it reads as above (i.e. as CISC computer), it means a computer that has a Complex Instruction Set Chip as its cpu. It is also referred to as CISC computing. It is sometimes called a CISC chip. This could have a tautology in the last two words, but it can be overcome by thinking of it as a Complex Instruction Set Computer chip. |
The acronym is variously used. If it reads as above (i.e. as RISC computer), it means a computer that has a Reduced Instruction Set Chip as its cpu. It is also referred to as RISC computing. It is sometimes called a RISC chip. This could have a tautology in the last two words, but it can be overcome by thinking of it as Reduced Instruction Set Computer chip. |
| CISC chips have an increasing number of components and an ever increasing instruction set and so are always slower and less powerful at executing common instructions | RISC chips have fewer components and a smaller instruction set, allowing faster accessing of common instructions |
| CISC chips execute an instruction in two to ten machine cycles | RISC chips execute an instruction in one machine cycle |
| CISC chips do all of the processing themselves | RISC chips distribute some of their processing to other chips |
| CISC chips are more common in computers that have a wider range of instructions to execute | RISC chips are finding their way into components that need faster processing of a limited number of instructions, such as printers and games machines |
There is significant difference between the chips. Chip makers Intel, Cyrix, Motorola and AMD all make both types of cpu chips.How do you learn this stuff.
Learn only one side.
The other side is just the opposite.
Choose which side you will learn.
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