RAM (Random Access Memory) Vs. ROM (Read Only Memory)
RAM (Random Access Memory) Vs. ROM (Read Only Memory)
There are several differences between the Random access memory and read-only memory which is given below:
| RAM (Random Access Memory ) | ROM (Read Only Memory) |
| 1. The RAM is the volatile memory which can store the data as long as the electric power is supplied. | 1. The ROM is the non-volatile memory, which can store the data even the electrical power supply is turned off. The data or information is saved in the absence of electrical power in this memory. |
| 2. The data or information stored in RAM can be retrieved or altered. | 2. We are not able to retrieve or change the information or data which is stored in ROM memory. The data stored in the ROM memory is only readable data. |
| 3. The RAM is high-speed memory. | 3. The ROM memory is quite slower than RAM. |
| 4. It is used to store the data that has been currently processed by the CPU temporarily. | 4. The Read-only memory is used to store the instructions which are required during the bootstrap of the computer. |
| 5. The CPU can access the data which is stored in volatile memory. | 5. The CPU cannot access that data which is stored in non-volatile memory. |
| 6. Random-access memory is large in size with higher capacity. | 6. The Read-only memory is small in size with less capacity. |
| 7. The RAM is used as CPU cache memory in the primary memory. | 7. ROM is used as the firmware, in the microcontroller. |
| 8. It is very costly as compared to other memory of the computer system. | 8. It is cheaper than the Random access memory. |
| 9. The data is easily accessible in the RAM. | 9. The information or data is not easily available in ROM as compared to RAM. |
| 10. The RAM chip is used in the ordinary operations of the computer, once the operating system is loaded. | 10. The ROM chip is used primarily in the startup process of the computer. |
| 11. The RAM chip memory can store the data in the Gigabytes, and the range is 1 to 256 GB per chip. | 11. The ROM chip memory can store the data in Megabytes, and the range is 4 to 8 MB per chip. |
| 12. We can say that the RAM is used for the temporary storage of data. | 12. The ROM memory is used for the permanent storage of data. |
| 13. The data can be accessed Randomly at any time, in any order, and from any physical location; it allows quick access and manipulation of data. | 13. The ROM contains programming which is needed to start the computer, that programming is essential for the boot-up before the system software loads. |
| 14. Random-access memory is the chip that is in the form of a rectangle and inserted over the motherboard of the computer. | 14. The Read-only memories are generally the optical drivers which are made of magnetic tapes. |
| 15. RAM is categorized into two types they are: Static Random access memory (SRAM) and Dynamic Random access memory (DRAM). | 15. ROM is divided into three types: they are PROM (Programmable Read-only memory), EPROM (Erasable programmable Read-only memory) and EEPROM (Electrically Erasable Programmable Read-only memory). |
| 16. The user can perform both read and write operations on that data or information which is stored in RAM. | 16. ROM memory allows the user to read the information or data, but we cannot perform the write operation in ROM. |
DRAM (Dynamic Random Access Memory) Vs. SRAM (Static Random Access Memory)
| DRAM (Dynamic Random Access Memory) | SRAM (Static Random Access Memory) |
| 1. The Dynamic Random access memory is made up of tiny capacitors that leak the electricity. | 1. Static Random access memory is composed of circuits which are similar to D flip-flops. |
| 2. The DRAM generates less heat when it is working. | 2. The SRAM generates more heat. |
| 3. It uses less electrical power. | 3. It uses more electricity power when this memory is active. |
| 4. Dynamic RAM is used for the main memory. | 4. The Static RAM is used for the cache memory. |
| 5. We can store many bits per chip of DRAM. | 5. The SRAM is not capable of storing many bits per chip. |
| 6. It is not more expensive. | 6. The Static Random access memory is costly than the other memories. |
| 7. It requires the recharge every few seconds to maintain the data or information. | 7. The Static RAM holds the data or information as long as the electric power is available. |
| 8. It uses the single transistor and capacitor for each memory cell. | 8. It uses the array of six transistors to each memory cell. |
| 9. The data accessibility is slower of Dynamic Random access memory. | 9. Data accessibility is faster as compared to DRAM. |
| 10. We need to refresh the memory cell after each reading of the capacitor in the Dynamic RAM. | 10. The Static RAM does not require a refresh cycle to the memory cell. |
| 11. The DRAM has a high density. | 11. The SRAM has a low density as compared to Dynamic Random access memory. |
| 12. It has a simply designed structure. | 12. It has a sophisticated structure design due to flip-flop. |
| 13. Dynamic Random access memory is present on the motherboard. | 13. The Static Random access memory is present on the processors or between the Processor and main memory. |
| 14. The size of dynamic RAM is 1GB to 2 GB in smartphones and tablets, 4GB to 16 GB in laptops. | 14. The size of Static RAM is 1MB to 16 MB. |
| 15. The Dynamic RAM is not fast in speed as compared to static RAM. | 15. The speed rate of static RAM is very fast. |
| 16. The DRAM requires more time to access the data or information. | 16. The SRAM requires a minimum time to access the data. |
| 17. Dynamic Random access memory is used in the main memory. | 17. The static Random access memory is used in cache memory. |