RAM, or Random Access Memory, is the memory that your computer uses to store information temporarily about the programs that are currently running. RAM is usually measured in kilobytes or megabytes. 'Kilo' means 1,000, and 'mega' means one million, yet a kilobyte is actually equal to 1,024 bytes. Also, a megabyte is equal to 1,048,576 bytes. There are four different types of RAM: DRAM, or Dynamic Random Access Memory; EDO, short for Extended Data Out; SDRAM, which stands for Synchronous DRAM; and RDRAM, or Rambus DRAM. While RDRAM is the fastest type available, it's also the most expensive, and SDRAM, the second-fastest type of memory, is the standard RAM used in most new computers. Most computers are capable of retaining 512 megabytes of RAM, but usually come with anywhere from 32 to 128 megabytes. There are two rules for upgrading your RAM quotient. First, know the right type of RAM for your computer. Second, RAM modules must be installed in pairs. For instance, if you want to add 32 megs of RAM to your computer, you must insert two 16- meg modules simultaneously. For more information, consult a computer professional.
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