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This technical report will look at various different memory devices and how they are implemented in a standard computer system. Internal memory devices such as ROM, PROM, RAM, SRAM, DRAM, SIMM and DIMM will be looked

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Introduction This technical report will look at various different memory devices and how they are implemented in a standard computer system. Internal memory devices such as ROM, PROM, RAM, SRAM, DRAM, SIMM and DIMM will be looked at in order to give a clear idea of how each one operates, and external devices such as memory sticks will also be touched upon. Each of these devices uses different types of memory in different ways. Over the course of this report, each of the aforementioned terms will be technically defined and reasons will be established as to why there are so many memory devices within a standard computer system. Memory Devices Technically, memory is electronic storage of any capacity; however, it is increasingly being used to identify temporary forms of storage. If the CPU in a standard computer system was to frequently access the hard disk drive for data retrieval, it would operate very slowly. On the other hand, if this much-needed data was stored in memory, not only would it be easier to access, but the CPU would also be able to access it much more quickly. Data that is stored in memory is generally only kept there on a temporary basis. ...read more.


The more data that is held in RAM, the slower it operates. Static RAM and Dynamic RAM One type of RAM is SRAM (Static Random Access Memory). SRAM retains its information as long as the power of the computer system is switched on. This memory is used for a computers cache memory, and as part of the "Random Access Memory Digital to Analogue Converter" on a video card. Another type of RAM is DRAM (Dynamic Random Access Memory). This memory is the most common kind of RAM used in standard computer systems. DRAM stores each bit in a storage cell, which is made up of a transistor and a capacitor. Capacitors tend to lose their charge quite quickly, therefore need to be recharged. DRAM chips are smaller and simpler in design compared to SRAM chips, but they are generally slower in operation, which makes the information slowly leak away and has to be refreshed (unlike Static RAM) by special regenerator circuits located in the CPU. The main memory of most computers uses Dynamic RAM chips, with the more expensive and faster Static RAM being used as cache memory. Both these types of memory lose all information as soon as the power of the computer system is switched off. ...read more.


The quality of the images do not get distorted, rather they are preserved to maintain their optimal overview. Furthermore, the Flash Memory can also be used to transfer pictures onto a standard computer system, where the user can print, edit or save files directly on to the default memory device. Conclusion Now that all the various memory devices have been analysed, appropriate conclusions will be drawn up in order to sum up what has been discussed. Internal memory devices such as RAM, ROM (and all the branches of ROM), SIMM's and DIMM's are requisites of a computer system. Without such memory devices, a computer system cannot function and there would be no storage medium to hold temporary data and data which instructs the operating system function correctly. External memory devices such as Memory Sticks and Flash Memory devices have become a way of replacing their predecessors (i.e. floppy disk and CD-ROM), and are not really required by a computer system in order for it function correctly. They are mainly used as a convenience and as a way of transferring data from one medium to another with minimal hassle. Such devices have also been incorporated into multimedia devices such as MP3 players and digital cameras, a "craze" which is becoming increasingly popular. ?? ?? ?? ?? 1 ...read more.

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