RAM - Random Access Memory

RAM - Random Access Memory, what is RAM, what is full from of RAM, what is DRAM, what is SRAM, define RAM, SRAM, DRAM, RAM - Random Access Memory, RAM - Random Access Memory

RAM stands from 'Random Access Memory' and it is often called the primary memory of computer which is made up of semiconductor chips. It is the working space used by the computer to hold the program that is currently running along with the necessary data and instructions. It is the fast and expensive memory which allows the computer to access the data and instruction very quickly. It is mainly used to store the following:
  • Data and instruction currently being processed. 
  • Data and instruction waiting to be processed. 
  • Information waiting to its output. 
  • Currently arrived data and instruction from Input system. 
It is called RAM because its contents can be accessed randomly (i.e. directly from any location and in any order). We can read from RAM as well as write into it. So, it is also called 'read-write' memory. The main drawback of RAM is that it is the volatile memory so the contents of RAM are lost when the computer is switched off.

It is made up of millions of microscopic cells which are distinctly numbered so that each cell can be identified and located. The memory cells are also called memory locations. Each cell can be electrically charged or not and the charged cell represents 1 and not charged cell represents 0.

Types of RAM.

DRAM:- stands for 'Dynamic Random Access Memory'. It is the most common and cheapest type of memory chip. It is made of capacitors which is capable of storing the electric charge. Due to leakage of charges, the capacitors discharge gradually and the memory cells lose their contents. So, DRAM has to be refreshed periodically by recharging the capacitors to retain its memory contents. It is slower than SRAM but it is dense, smaller in size and less expensive.

SRAM:- stands for 'Static Random Access Memory' and it is made of transistors. It is called static because it can remember or retain its memory contents without being refreshed or recharged as long as there is power. So, the SRAM does not need to be refreshed or recharged periodically like DRAM. SRAM is faster than DRAM but more expensive, loser in density and bigger in size and consumes more power.

You May Also Like...

Subscribe Us