- RAM stands for Random Access Memory.
- RAM is primary storage device of the computer.It allows the user to read and write the device.It stores the data permanently.
- Random Access Memory (RAM) is a type of data storage used in computers that is generally located on the motherboard.
- RAM is invented by Robert Dennard initiated in 1960's and released in the year of 1968.
- RAM costs are cheap.For 8GB Expect to pay $75,$125 for 16GB of RAM.
- RAM is much faster to read and write the data compared to the other storage devices.
- RAM is volatile. i.e means RAM loses the data after shut down .
Types of RAM :
- Static RAM (SRAM)
- Dynamic RAM (DRAM)
1.Static RAM :
- The word static indicates that the memory retains its contents as long as power is being supplied. However, data is lost when the power gets down due to volatile nature. SRAM chips use a matrix of 6-transistors and no capacitors.
- SRAM is faster when compared to the DRAM in accessing the data.
2.Dynamic RAM :
- Dynamic random-access memory (DRAM) is a type of RAM that stores each bit of data in a separate capacitor within an integrated circuit. The capacitor can be either charged or discharged; these two states are taken to represent the two values of a bit, conventionally called 0 and 1.
- DRAM is widely used in digital electronics where low-cost and high-capacity memory is required.
- The advantage of DRAM is its structural simplicity: only one transistor and a capacitor are required per bit, compared to four or six transistors in SRAM
Difference between the SRAM AND DRAM :
- SRAM is static while DRAM is dynamic.
- SRAM is faster compared to DRAM.
- SRAM consumes less power than DRAM.
- SRAM uses more transistors per bit of memory compared to DRAM.
- SRAM is more expensive than DRAM.
- Cheaper DRAM is used in main memory while SRAM is commonly used in cache memory
RAM CATEGORIES :
