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Thursday, November 22, 2018

COMPUTER MEMORY

COMPUTER MEMORY

COMPUTER MEMORY , RAM , ROM

  • What is Computer Memory ?
-> Memory is major part of computers . Memory is best storage part to the computer users to save data, programs, information and etc.The computer memory have different types of storage media . some of them can store data permanently and some of them can store data temporarily.


Types of Computer Memory  :-  Computer Memory has two types such as -
1. Primary Memory / Volatile Memory
2. Secondary Memory / Non Volatile Memory

1. Primary Memory / Volatile Memory :-

Primary Memory is main memory of computer system. It also called as volatile Memory because the memory can’t store the data permanently . it also has another name RAM.

RAM ( Random access Memory ) :
RAM stands for Random access Memory. RAM is Primary memory of computer system . It's perform both read and write operations on memory. If power failures happened in systems during memory access then you will loss data permanently So RAM is volatile Memory. 

COMPUTER MEMORY , RAM

Different types of RAM is :- SRAM , DRAM
SRAM :- (Static Random access Memory) SRAM gives you faster access to information compare  to the DRAM. SRAM is more expensive . SRAM is more commonly used in cache and video card memory only.

DRAM :-  (Dynamic Random access Memoryit has slower access speed as compared to SRAM . it also the lowest cost and is the cheaper . various types of DRAM is :-
1. DDR  is Double Data Rate . it has 184 pins and 2.5 V Operating voltage.
2.  DDR2 is Double Data Rate 2 .it has 240 pins and 1.8 V Operating voltage.
3. DDR3 is Double Data Rate 3 . it has 240 pins and 1.5 V Operating voltage.
4. DDR4 is Double Data Rate 4 . it has 288 pins and 1.2 V operating voltage.


COMPUTER MEMORY , RAM

2.Secondary Memory / Non volatile Memory :-

Secondary Memory is External and permanent memory of computer system . Secondary memory also called as non volatile memory because the memory can store data permanently . example of secondary memory is ROM .

ROM(Read only Memory) :
ROM stands for read only memory . ROM is secondary memory of computer system. It work with read only operation. No data lose happen whenever power failure occur during the ROM memory work in computer.
COMPUTER MEMORY , ROM

ROM memory has several types such as :
1. PROM :- Programmable Read Only Memory.
2. EPROM :- Erasable Programmable Read Only Memory.
3. EEPROM :- Electrically-Erasable Programmable Read Only Memory.

References :-

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