A typical laptop computer may come with 8 gigabytes of RAM, while a hard disk can hold 10 terabytes.Ī hard drive, on the other hand, stores data on the magnetized surface of what looks like a vinyl record. It's also small in terms of the amount of data it can hold. RAM is physically small and stored in microchips. Any data that's read flows back on a separate data line. Each row and column in a RAM array has its own address line. To find a specific cell, the RAM controller sends the column and row address down a thin electrical line etched into the chip.
A set of RAM boxes is called an array, and each box is known as a cell. Each box has a unique address that is found by counting across the columns and down the rows. RAM is similar in concept to a set of boxes in which each box can hold a 0 or a 1. Other types of storage - such as the hard drive and CD-ROM- are also accessed directly or randomly, but the term random access isn't used to describe these other types of storage. RAM is organized and controlled in a way that enables data to be stored and retrieved directly to and from specific locations.
#QUE ES LA MEMORIA RAM OFFLINE#
Offline memory typically referred to magnetic tape from which a specific piece of data could only be accessed by locating the address sequentially, starting at the beginning of the tape. Originally, the term Random Access Memory was used to distinguish regular core memory from offline memory. The term random access as applied to RAM comes from the fact that any storage location, also known as any memory address, can be accessed directly. However, the combination of RAM and storage memory can be completely used up.
#QUE ES LA MEMORIA RAM FULL#
RAM modulesĪ computer's hard disk can become completely full of data and unable to take any more, but RAM won't run out of memory. This process slows the computer's operation.
If RAM fills up, the computer's processor must repeatedly go to the hard disk to overlay the old data in RAM with new data. When a person's short-term memory fills up, it can be refreshed with facts stored in the brain's long-term memory.Ī computer also works this way. Short-term memory is focused on immediate work, but it can only keep a limited number of facts in view at any one time. RAM can be compared to a person's short-term memory, and a hard disk drive to a person's long-term memory. Function of RAMīecause of its volatility, RAM can't store permanent data. When the computer is rebooted, the OS and other files are reloaded into RAM, usually from an HDD or SSD. That means data is retained in RAM as long as the computer is on, but it is lost when the computer is turned off. It is much faster to read from and write to than other kinds of storage, such as a hard disk drive ( HDD), solid-state drive ( SSD) or optical drive. RAM (Random Access Memory) is the hardware in a computing device where the operating system ( OS), application programs and data in current use are kept so they can be quickly reached by the device's processor.
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