Different Types of Computer Memories
Memory is a computer system's primary workspace. It works in one behind the other with the CPU, or microprocessor, to store data, programs, and processed information that can be made immediately and directly accessible to the CPU or to other system devices. Memory is central to a computer's operation because it forms the critical link between software and the CPU. Computer memory also determines the size and number of programs that can be run simultaneously, and helps to optimize the capabilities of powerful microprocessors.RAM (Random Access Memory) Internally, computer memory is arranged as a matrix of "memory cells" laid out in rows and columns, like squares on a checkerboard. Each memory cell is used to store a bit of data, which can be instantaneously retrieved by indicating the row and column location (or address) of the data. Because these bits of data can be individually accessed, retrieved, and modified at random, the type of main memory used in computers is called random access memory. RAM is a volatile form of memory, which means that it must have power in order to retain data. When the power is turned off, data in RAM is lost. Contrast this to other storage media such as disks, tapes, and CDs that retain data even
Availability 1995 1997 1998 1999 1999 Source: EDN, 4 Jan 1996 [Specs for standard DRAM indicate access time (ns x10) ] [Specs for SDRAM indicate cycle time (ns) ] Available: http://www.kingston.com/tools/bits/bit3.asp Today's Computer Central Processing Unit (CPU) has increased their integrated memories to store the data addresses, as doing so will save time getting information needed from memory within CPU instead of from the main memory thus increase the efficiency of data processes. The memory used in CPU is called Cache Memory, cache is a small block of high-speed memory usually SRAM located between the CPU and main memory that is used to store frequently requested data and instructions. When the processor needs data, it will check in high-speed cache first to see if the data is there. If not, then the processor will retrieve the data from slower main memory. Caches vary in sizes; normally a CPU has 512k of Level 2 Cache (Secondary cache) some has 0k, 128k, 1Mb, or 2Mb. The more cache a CPU has, the better performance it has but more expensive. (For example, an Intel Pentium III Xeon processor with 8-way processing will usually has 1Mb or 2Mb or L2 cache.)
Some common words found in the essay are:
Memory Internally, RAM DRAM, DRAM SDRAM, SDRAM Specification*, Cache Memory, Corporation Memories, Concurrent RDRAM, Data EDO, Rambus Development, Direct RDRAM, main memory, 11th april 2000, posting 11th april, 2000 available, april 2000 available, online posting, posting 11th, 11th april, online posting 11th, april 2000, march 1996, march 1996 online, 1996 online, kingston technologies, 2nd march,
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Approximate Pages = 5 (250 words per page double spaced)
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