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Apr 10 2019

What is RAM – Random Access Memory? Webopedia Definition

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What is RAM - Random Access Memory? Webopedia Definition, NEF6.COM

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RAM – random access memory

RAM (pronounced ramm ) is an acronym for r andom a ccess m emory. a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices. such as printers .

Main Types of RAM

There are two main types of RAM:

The two types of RAM differ in the technology they use to hold data, with DRAM being the more common type. In terms of speed, SRAM is faster. DRAM needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM.

DRAM supports access times of about 60 nanoseconds, SRAM can give access times as low as 10 nanoseconds. Despite SRAM being faster, it’s not as commonly used as DRAM because it’s more expensive. Both types of RAM are volatile . meaning that they lose their contents when the power is turned off.

RAM, Main Memory and ROM Explained

In common usage, the term RAM is synonymous with main memory . the memory available to programs. For example, a computer with 8MB RAM has approximately 8 million bytes of memory that programs can use. In contrast, ROM (read-only memory) refers to special memory used to store programs that boot the computer and perform diagnostics. Most personal computers have a small amount of ROM (a few thousand bytes). In fact, both types of memory (ROM and RAM) allow random access. To be precise, therefore, RAM should be referred to as read/write RAM and ROM as read-onlyRAM.

Recommended Reading: Webopedia study guides are designed to help high school, IB (International Baccalaureate) and entry-level university or college students prepare for computer science tests, quizzes and exams.

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