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Computer Memory Types Explained ft. Primary, Secondary, Internal, External, Cache | HorizonTech4You

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• published: 01 Aug 2016
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HorizonTech4You - https://goo.gl/sI6Swo KnowledgeBase4You - https://goo.gl/AIwUuq Subscribe - https://goo.gl/sI6Swo Facebook - https://goo.gl/BgRPWj Twitter - https://goo.gl/bTSYL9 Google+ - https://goo.gl/FqtJiC Computer Memory Types Explained ft. Primary, Secondary, Internal, External, Cache | HorizonTech4You HorizonTech4You Explained Videos - https://goo.gl/4ouWsF HorizonTech4You Tutorials Videos - https://goo.gl/PM3Ih0 HorizonTech4You How To Videos - https://goo.gl/2WlYzl HorizonTech4You Hindi Videos - https://goo.gl/BZVllB HorizonTech4You Computer Basics Videos - https://goo.gl/C8HEbf HorizonTech4You Storage Videos - https://goo.gl/9ZCLZi HorizonTech4You RAM Videos - https://goo.gl/ldwM3A HorizonTech4You Demonstration Videos - https://goo.gl/aZhIAv HorizonTech4You What's The Difference - https://goo.gl/PM3Ih0 Computer memory is any physical device capable of storing information temporarily or permanently. For example, Random Access Memory (RAM), is a volatile memory that stores information on an integrated circuit used by the operating system, software, and hardware. Memory can be either volatile and non-volatile memory. Volatile memory is a memory that loses its contents when the computer or hardware device loses power. Computer RAM is an example of a volatile memory and is why if your computer freezes or reboots when working on a program, you lose anything that hasn't been saved. Non-volatile memory, sometimes abbreviated as NVRAM, is a memory that keeps its contents even if the power is lost. EPROM is an example of a non-volatile memory. It is very common for new computer users to be confused by what parts in the computer are memory. Although both the hard drive and RAM are memory, it is more appropriate to refer to RAM as "memory" or "primary memory" and a hard drive as "storage" or "secondary storage." When someone asks how much memory is in your computer, it is often between 1GB and 16GB of Random Access Memory (RAM) and several hundred gigabytes of even a terabyte of hard disk drive storage. In other words, you always have more hard drive space than RAM. When a program such as your Internet browser is open, it is loaded from your hard drive and placed into RAM, which allows that program to communicate with the processor at higher speeds. Anything you save to your computer, such as a picture or video, is sent to your hard drive for storage. All of devices on a computer do not operate at the same speed and computer memory gives your computer a place to quickly access data. If the CPU had to wait for a secondary storage device like a hard disk drive the computer would be much slower. In computing, memory refers to the computer hardware devices used to store information for immediate use in a computer; it is synonymous with the term "primary storage". Computer memory operates at a high speed, for example random-access memory (RAM), as a distinction from storage that provides slow-to-access program and data storage but offers higher capacities. If needed, contents of the computer memory can be transferred to secondary storage, through a memory management technique called "virtual memory". An archaic synonym for memory is store.[1] The term "memory", meaning "primary storage" or "main memory", is often associated with addressable semiconductor memory, i.e. integrated circuits consisting of silicon-based transistors, used for example as primary storage but also other purposes in computers and other digital electronic devices. There are two main kinds of semiconductor memory, volatile and non-volatile. Examples of non-volatile memory are flash memory (used as secondary memory) and ROM, PROM, EPROM and EEPROM memory (used for storing firmware such as BIOS). Examples of volatile memory are primary storage, which is typically dynamic random-access memory (DRAM), and fast CPU cache memory, which is typically static random-access memory (SRAM) that is fast but energy-consuming, offering lower memory areal density than DRAM. Most semiconductor memory is organized into memory cells or bistable flip-flops, each storing one bit (0 or 1). Flash memory organization includes both one bit per memory cell and multiple bits per cell (called MLC, Multiple Level Cell). The memory cells are grouped into words of fixed word length, for example 1, 2, 4, 8, 16, 32, 64 or 128 bit. Each word can be accessed by a binary address of N bit, making it possible to store 2 raised by N words in the memory. This implies that processor registers normally are not considered as memory, since they only store one word and do not include an addressing mechanism.