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What is the difference between RAM and ROM? Reward $5
Created by larry2, 1793 days ago, 2078 views

What is the difference between RAM and ROM?
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Pravy1793 days ago

The definition of RAM is Random Access Memory & ROM is Read Only Memory.

In terms of computers processing RAM stores temporary files which can be accessed ASAP as and when needed during the time the computer is running. These temp files are cleared as soon as the computer is switched off. Whereas ROM is read only, I, e it stores data permanently which can be accessed but cannot be altered.

One funny example could be to understand your course textbooks as ROM and your notes as RAM.. :)

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ha141793 days ago


1) ROM are generally the optical drivers that are made of magnetic tapes. ROM (Read Only Memory) chip is non-volatile storage and does not require a constant source of power to retain information stored on it. It is not erased when you power off your pc. Data stored in ROM can only be modified slowly, with difficulty, or not at all, so it is mainly used to distribute firmware or ROM is used for storing programs, BIOS has information to boot the system. ROM c'an’t be directly accessed by the processor because first it is transferred into RAM. Ttpes of ROM are PROM (Programmable Read Only Memory), EPROM( Erasable programmable read-only memory) and EEPROM (Electrically Erasable Programmable Read-Only Memory). There is also Flash ROM (using a single transistor), EEPROM can be written and read word by word, while Flash can be erased by pages.
2) RAM is a form of chip. RAM (Random Access Memory) chip is volatile and requires a constant source of power to retain information. When you power off your computer the data stored in RAM is deleted. Whenever, we want to perform some task, memory is first loaded in RAM before hard drive. RAM is easily accessed by the processor. Types of RAM, SRAM (static random access memory) used only as a memory cache usually found in the CPU (L1, L2 and L3 Cache), DRAM (dynamic random access memory) memory used in computers, DDR (Double Data Rate), DDR2, DDR3 and SDRAM

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SetupComputer1793 days ago

@larry2 ,

RAM (Random Access Memory) is a variable data storage module, while the ROM (Read-only Memory) is a fixed data storage module.

RAM is where data is stored and given a "memory address" which serves as a reference so programs and system processes can use it. For example, the data "2,202.56" is stored and has an address of 0x8622FE3C. A calculator app can recall that value using the address/reference then use this value for other operations, like addition, subtraction, etc. Now, once the program (calculator app) closes, this memory address will be overwritten by other data from other programs. The term "Random" is inherent to the nature of data storage - the same data (2,202.56) might be stored randomly in different memory addresses, and the same memory address can be used by different types of data.

ROM contains data or instruction that are fixed and must remain fixed. For example, the BIOS (basic input output stream) of the computer (which communicates the hardware to the operating system) is written in a ROM, since tampering it can result in bootup failure. Although, ROM storage can be flashed using special software if there is a need. For example, a BIOS update will flash the old BIOS program and replace it with a new BIOS program.


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Aravi1793 days ago

Ram is a volatile memory. It provides temp storage fast memory for running program.

Rom is non volatile memory. It have permanent stored details of boot sequences of hardware etc. Comparatively slower then Ram.

RAM random access memory

ROM Read only memory

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Henry98az1792 days ago

RAM (Random access memory) it's a type of memory that keeps information when the computer is on, when it's off the information is deleted.

the ram is like waiting room, the processor work a task and the the ram send another and so on.

ROM (Read only memory) it's a type of memory that is always burned in.

the rom gives orders to the components about the post, boot order, overclocking settings, that kind of controling.

sorry for my english, it's not my language :D

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zrodfects1792 days ago

Hope this in depth info helps you understand more of the two:

Read-only memory, or ROM, is a form of data storage in computers and other electronic devices that can not be easily altered or reprogrammed. RAM is referred to as volatile memory and is lost when the power is turned off whereas ROM in non-volatile and the contents are retained even after the power is switched off.

Random-access memory, or RAM, is a form of data storage that can be accessed randomly at any time, in any order and from any physical location in contrast to other storage devices, such as hard drives, where the physical location of the data determines the time taken to retrieve it. RAM is measured in megabytes and the speed is measured in nanoseconds and RAM chips can read data faster than ROM.

Random Access Memory or RAM is a form of data storage that can be accessed randomly at any time, in any order and from any physical location., allowing quick access and manipulation.

Stands for
Random Access Memory

RAM allows the computer to read data quickly to run applications. It allows reading and writing.

RAM is volatile i.e. its contents are lost when the device is powered off.

The two main types of RAM are static RAM and dynamic RAM.

Read-only memory or ROM is also a form of data storage that can not be easily altered or reprogrammed.Stores instuctions that are not nescesary for re-booting up to make the computer operate when it is switched off.They are hardwired.

Stands for
Read-only memory

ROM stores the program required to initially boot the computer. It only allows reading.

It is non-volatile i.e. its contents are retained even when the device is powered off.

The types of ROM include PROM, EPROM and EEPROM.

Differences in use:
RAM allows the computer to read data quickly and efficiently to be able to run applications efficiently, whereas ROM stores the program required to initially boot the computer and perform diagnostics. RAM is a common type of memory found in computers and printers, and can go up to a few gigabytes. ROM is usually only a few thousand bytes of storage in personal computers. RAM is primary memory and volatile

Different Types of RAM vs ROM:
The main types of RAM include static RAM (SRAM), dynamic RAM (DRAM). Static RAM is more expensive and has more capacity for storage than dynamic RAM that has to be refreshed more often, and is thus slower.

ROMs are integrated circuits that contain data and most often cannot be altered. There are some types that can be somewhat modified that include programmable ROM (PROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) and Flash, which is a type of EEPROM. PROM is a type of ROM that can be programmed only once by a special device and uses high voltages. EPROM can be rewritten using UV radiation, whereas EEPROM can be rewritten electrically and such devices do not require to be removed from the computer. Flash drives are modern version of EEPROM and fastest to erase and rewrite. Some other common types of ROM are CD-ROM, CD-R and CD-RW which is used to store media and music files.

Hope this helps

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azzromyo1792 days ago

Hi @larry2
the true answer :


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andiupn1792 days ago

Hello @larry2 ~ :D

RAM is Random Access Memory -> can be use to store memory and use it...
ROM is Read Only Memory -> only can be use to read it...

hope thats help :D

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larry21792 days ago

Thank you guys.
And I think the ROM of smartphone is different with computer. Right?

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ZzMrXzZ1791 days ago

RAM is Random Access Memory.
ROM is Read Only Memory.
RAM is the memory available for the operating system, programs and processes to use when the computer is running.
ROM is the memory that comes with your computer that is pre-written to hold the instructions for booting-up the computer.
RAM requires a flow of electricity to retain data (e.g. the computer powered on).
ROM will retain data without the flow of electricity (e.g. when computer is powered off).
RAM is a type of volatile memory. Data in RAM is not permanently written. When you power off your computer the data stored in RAM is deleted.
ROM is a type of non- volatile memory. Data in ROM is permanently written and is not erased when you power off your computer.
There are different types of RAM, including DRAM (Dynamic Random Access Memory) and SRAM (Static Random Access Memory).
There are different types of ROM, including PROM (programmable read-only memory) that is manufactured as blank memory (e.g. a CD-ROM) and EPROM (erasable programmable read-only memory).

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SetupComputer1791 days ago

@larry2 ,

Well, the hardware of the ROM itself is most probably different, since smartphones uses ARM Architecture (which means one instruction processed at a time in the CPU). PCs usually use the x86 (32 instructions at a time) and x64 (64 instructions at a time).

However, the concept is still the same. Smartphones are small computers. A smartphone also stores the BIOS program in the ROM, as well as the OS. The data programs use is stored in the RAM and given a memory address that programs use as reference to retrive that data and perform functions.


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