page contents difference between RAM and ROM | RAM vs ROM - The difference between

difference between RAM and ROM | RAM vs ROM

The RAM and ROM full form is, RAM: Random-Access Memory and ROM stands for Read Only Memory. The Main Key difference between RAM and ROM both are the internal memories of the computer. Where RAM is a temporary memory, ROM is a permanent memory of the computer. There are many differences between RAM and ROM, but the basic difference is that RAM is a read-write memory and the ROM is a read only memory. I have discussed some difference between RAM and ROM.


Difference between RAM and ROM | RAM vs ROM


RAM vs ROM: What’s the main key difference between RAM and ROM


What Is RAM ( Random-Access Memory )?

Random-access memory (RAM ) is a form of computer data storage that stores data and machine code currently being used. RAM is a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes.

Where is RAM Found?


difference between ram and rom

RAM is found in servers, PCs, tablets, smartphones and other devices, such as printers.


Random Access Memory (RAM) is the hardware in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device’s processor.
RAM is the main memory in a computer, and it is much faster to read from and write to than other kinds of storage, such as a hard disk drive (HDD), solid-state drive (SSD) or optical drive. Random Access Memory ( RAM ) is volatile. That means data is retained in RAM as long as the computer is on, but it is lost when the computer is turned off. When the computer is rebooted, the OS and other files are reloaded into RAM, usually from an HDD or SSD.


Difference between RAM and ROM: How does RAM work?

The term random access as applied to RAM comes from the fact that any storage location, also known as any memory address, can be accessed directly. Originally, the term Random Access Memory was used to distinguish regular core memory from offline memory.


How Many Types Of RAM?


As we know, There are two main types of RAM:

  • SRAM (Static Random Access Memory)
  • DRAM (Dynamic Random Access Memory)


Difference between RAM and ROM: – SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory)


SRAM (Static Random Access Memory):

While DRAM is typically used for main memory, today SRAM is more often used for system cache. SRAM is said to be static because it doesn’t need to be refreshed, unlike dynamic RAM, which needs to be refreshed thousands of times per second. As a result, SRAM is faster than DRAM. However, both types of RAM are volatile, meaning that they lose their contents when the power is turned off.


DRAM (Dynamic Random Access Memory):

The term dynamic indicates that the memory must be constantly refreshed or it will lose its contents. DRAM is typically used for the main memory in computing devices. If a PC or smartphone is advertised as having 4-GB RAM or 16-GB RAM, those numbers refer to the DRAM, or main memory, in the device.


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Difference between RAM and ROM: – What is ROM ( Read-only memory )?

Read-only memory (ROM) is a type of non-volatile memory. The memory from which we can only read but cannot write on it. Data stored in ROM can only be modified slowly, with difficulty, or not at all, so it is mainly used to store firmware (software that is closely tied to specific hardware, and unlikely to need frequent updates) or application software in plug-in cartridges.


Where is ROM found?

difference between ram and rom

ROM chips are not only used in the computer but also in other electronic items like washing machine and microwave oven.


Most personal computers contain a small amount of ROM that stores critical programs such as the program that boots the computer. In addition, ROM are used extensively in calculators and peripheral devices such as laser printers, whose fontshare often stored in ROM.

More recently, ROM has come to include memory that is read-only in normal operation, but can still be reprogrammed in some way.


How many types of ROM?


There are five basic ROM types:

  • MROM (Masked ROM)
  • PROM (Programmable Read Only Memory)
  • EPROM (Erasable and Programmable Read Only Memory)
  • EEPROM (Electrically Erasable and Programmable Read Only Memory)
  • Flash memory


MROM (Masked ROM):

The very first ROMs were hard-wired devices that contained a pre-programmed set of data or instructions. These kind of ROMs are known as masked ROMs, which are inexpensive.


PROM (Programmable Read Only Memory):

This type of ROM can be re-programmed by using a special device called a PROM programmer. Generally, a PROM can only be changed/updated once.


EPROM (Erasable and Programmable Read Only Memory):

This type of ROM can have its contents erased by ultraviolet light and then reprogrammed by an RPROM programmer. This procedure can be carried out many times; however, the constant erasing and rewriting will eventually render the chip useless.


EEPROM (Electrically Erasable and Programmable Read Only Memory):

This type of ROM works in a similar way to Flash memory in that it can its contents can be ‘flashed’ for erasure ad then written to without having to remove the chip from its environment. EEPROMs are used to store a computer system’s BIOS, and can be updated without returning the unit to the factory. In many cases, BIOS updates can be carried out by computer users wishing a BIOS update.


Flash memory:

Flash memory is an example of quite a recent type of storage technology known as solid state devices. This type of portable storage has become very popular because of its low price and high storage capacity compared to its rivals, e.g. floppy disk.


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Difference between RAM and ROM – RAM vs ROM – Comparison Between RAM and ROM


RAM vs ROM RAM ( Random-Access Memory ) ROM (Read-Only Memory )
Basic It is a read-write memory. It is read only memory.
Data The data is not permanent and it can be altered any number of times. The data is permanent. It can be altered but only a limited number of times that too at slow speed.
Speed It is a high-speed memory. It is much slower than the RAM.
CPU Interaction The CPU can access the data stored on it. The CPU can not access the data stored on it. In order to do so, the data is first copied to the RAM.
Size and Capacity Large size with higher capacity. Small size with less capacity.
Usage Primary memory (DRAM DIMM modules), CPU Cache (SRAM). Firmware like BIOS or UEFI. RFID tags, microcontrollers, medical devices, and at places where a small and permanent memory solution is required.
Volatility It is a volatile memory. It is a non-volatile memory.
Modification Data in ROM can be modified. Data in ROM can not be modified.
Cost It doesn’t come cheap. It is littlebit cheaper than RAM.


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Conclusion: Difference between RAM and ROM

In the difference between RAM and ROM, both are the necessary memory for the computer. ROM is a necessary for a computer to boot up. RAM is important for CPU processing.


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