Difference between ROM and RAMPosted by Just Kappel on May 29th, 2021 What is RAM? RAM means random access memory. That is also known as temporary memory. RAM is used to store data and programs that are utilized by the processor in real-time. Data on RAM could be erased, read, and write at any time. Data stored in RAM is temporary and is automatically erased once the computer is turned off. Types of RAM: There are basically two types of RAM as follows: SRAM: SRAM stands for stable random access memory. SRAM stores data utilizing the state of six transistor memory cells. DRAM: DRAM means Dynamic Random Access Memory. DRAM stores the data using capacitors and transistors. Difference between DRAM and SRAM: SRAM: SRAM is really a one chip memory. The info access time of SRAM is faster than DRAM. SRAM Storage capacity is significantly less than DRAM. SRAM is expensive than DRAM. DRAM: DRAM is an off chip memory. The info access time of DRAM is slower than SRAM. DRAM storage capacity is more than SRAM. DRAM is cheaper than SRAM. What is ROM? ROM stands for read-only memory, it is also known as permanent memory. ROM is a type of electronic storage that comes built into a device during manufacturing. You can find ROM chips in your computers and several other types of electronic products such as car radios, VCRs, and digital watches. ROM is a volatile memory this means it remains viable even when your computer / device is off. Types of ROM: There are basically five types of ROMs. Let?s discuss at length one by one. PROM: PROM stands for programmable read-only memory. Data is stored in PROM is once and can't be changed or deleted. A good example of a PROM is the BIOS in older computers. But now PROM has been replaced by EEPROM. EPROM: EPROM stands for Erasable Read only memory. It?s another kind of Read Only Memory. The data remains constant even when there is absolutely no power in the EPROM. Data could be reprogrammed and erased in EPROM using ultraviolet (UV) light. UV light erases the info on the chip, so we can reprogram the data inside it. big data technology EEPROM: EEPROM stands for electrically erasable programmable Read Only Memory. The principle process of EEPROM is similar to that of EPROM, which we mentioned above, but the way to write and erase data by exposing it to electrical charge. Data could be reprogrammed in EEPROM, about 10,000 times. EEPROM allows the user to program and delete data at any location in the memory, but the data erased by one byte simultaneously instead of erasing the complete chip. That?s why the reprogramming process could be a bit slow. Flash Memory: Flash memory is really a modern type of EEPROM. Compared to normal EEPROM, the speed of rewriting and deleting data from flash memory is faster. Flash memory is a distinct type of EEPROM, that is programmed to erase the large block of data simultaneously. Additionally it is used to transfer data between different devices. Difference between RAM and ROM: The key differences between RAM and ROM are the following: RAM: RAM means Random. only Memory RAM is a volatile memory, meaning that the data is stored so long as the power is supplied. The data is stored in RAM could be altered and retrieved. Data processing speed of RAM is faster than ROM. The info stored in RAM is easily accessible. CPU can access the data directly to the RAM. RAM is used as a CPU cache memory. The physical size of the ROM is normally larger than the RAM. It usually comes in two different sizes for laptops and computers. Laptop RAM is 3 inches long and 1 inch wide. However, the desktop RAM is 6 inches long and about 1 inch wide. Its more expensive than ROM. Types: SRAM (Static Random Access Memory), DRAM (Dynamic Random access Memory). ROM: ROM stands for Read only Memory. ROM is really a non-volatile memory, which means that the data is stored until the power is turned off. The data is stored in ROM can only just be read. Data processing speed of ROM is slower than RAM. The info stored in ROM is not easily accessible. CPU cannot access data directly to the ROM unless the info is stored in RAM. ROM can be used as firmware by microcontrollers. Its size limits are usually smaller than RAM based on storage capacity. Its size limits are usually smaller than RAM based on storage capacity. It?s cheaper than RAM. Types: PROM (programmable read-only memory), EPROM (Erasable Read only memory), EEPROM (electrically erasable programmable Read Only Memory), Flash Memory, MROM (Mask Read Only Memory). Bottom Line: Both ROM and RAM are crucial memories for a computer. RAM is necessary for CPU processing and RAM must boot up the computer.Like it? Share it! More by this author |