Difference between RAM and ROM

Difference between RAM and ROM

Difference between RAM and ROM

RAM (Random Access Memory) and ROM (Read Only Memory) are two types of computer memories that are integrated in a computer to modulate the processor, to accurately and rapidly access the information stored in computer.  Even though both the RAM and ROM are meant for storage purpose, they vary in the style of usage, i.e. ROM is used to stockpile the code for programs that are run under the processor.  RAM is used to clutch the temporary information that is produced and used by the processor. The name random access memory reflects that the user can instantaneously access any area of the memory without referring the entire memory space. The RAM memory is volatile in nature, i.e the memory stored in the RAM is temporary and it will be lost when the power gets switched off. In case ROM, it is non volatile and the information stored in the ROM is permanent and will not be erased off during the power off.

  

The following table highlights the major difference between the RAM memory and ROM memory:

Options RAM ROM
Elaboration Random Access Memory Read Only memory
Accessibility In reference with the processor, the information stored in the RAM is easily accessed The processor cannot directly access the information that is stored in the ROM. In order to access the ROM information, first the information will be transferred into the RAM and then it gets executed by the processor
Working type Both the read and write operations can be performed over the information that is stored in the RAM The ROM memory only allows the user to read the information. User cannot make any changes to the information.
Storage RAM memory is only used to store the temporary information. ROM memory is used to store permanent information and cannot be deleted.
Speed the accessing speed of RAM is faster, it assist the processor to boost up the speed Speed is slower in comparison with RAM, ROM cannot boost up the processor speed
Data preserving Electricity is needed in RAM to flow to preserving information Electricity is not needed in ROM to flow to preserving information
structure The RAM is an chip, which is in the rectangle form and is inserted over the mother board of the computer ROMs are generally the optical drivers, which are made of magnetic tapes.
Cost The price of RAMs are comparatively high The price of ROMs are comparatively low
Chip size Physically size of RAM chip is larger than ROM chip Physically size of ROM chip is smaller than RAM chip.
Types The RAM memory is categorized into two types they are the: Statistic RAM (SRAM) and Dynamic RAM (DRAM) The ROM memory is categorized into three types, they are: PROM (Programmable Read Only memory), EPROM  (Erasable Programmable Read Only memory)  and EEPROM (Electrically Erasable Programmable Read Only memory)
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