There is one major difference between ram and rom. ROM can store data without power, and RAM does not. Basically, the ROM is designed for permanent storage, and RAM is for temporary storage.


Alternative explanation

The ROM system is a non-volatile storage medium because ROM does not require a permanent power source to store information stored on it. In contrast, the RAM system is unstable, which means that it loses all information it holds when the power is turned off.



difference between ram and rom
difference between ram and rom


other difference between ram and rom

The ROM chip is used primarily in the process of starting the computer, while the RAM system is used in the normal operation of the computer after the operating system is loaded. Writing data to the ROM system is a much slower process than saving it in a RAM system.


The RAM chip can store many gigabytes (GB) of data, from 1 GB to 256 GB per chip. The ROM chip stores many megabytes (MB) of data, typically 4 MB or 8 MB per chip.



Computer ROM

A good example of ROM is the BIOS of the computer, the PROM chip, which stores the programming needed to start the initial computer start-up process. Using a non-volatile storage medium is the only way to start the start-up process of computers and other devices. ROM chips are also used in game system cartridges, such as the original Nintendo, Gameboy, Sega Genesis and many more.



Differences in use

RAM memory allows the computer to quickly and efficiently read data to run applications efficiently, while ROM stores the program required to initially start the computer and perform diagnostics. RAM is a popular type of memory found in computers and printers and can reach up to several gigabytes. ROM is usually only a few thousand bytes of memory in personal computers. RAM is the basic and unstable memory.



Different types of RAM vs ROM


Another difference between ram and rom are The main types of RAM are static RAM (SRAM), dynamic RAM (DRAM). Static RAM is more expensive and has more storage capacity than dynamic RAM. Static ram needs to be refreshed more often, and therefore slower.


ROMs are integrated circuits that contain data and usually cannot be changed. There are several types that may be slightly modified, including programmable ROM (PROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) and flash, which is a type of EEPROM memory.


PROM is a type of ROM that can only be programmed once by a special device and uses high voltage. EPROM can be rewritten using UV radiation, while EEPROM can be rewritten electrically and these devices do not need to be removed from the computer.


Flash drives are a modern version of EEPROM and the fastest for erasing and rewriting. Some other popular ROM types are CD-ROMs, CD-Rs, and CD-RWs that are used to store multimedia and music files.