DRAM is the most common kind of RAM for personal computers and workstations. Memory is the network of electrically-charged points in which a computer stores quickly accessible data in the form of 0s and 1s. Random Access means that the PC processor can access any part of the memory or data storage space directly rather than having to proceed sequentially from some starting place.
DRAM is dynamic in that, unlike static RAM (SRAM), it needs to have its storage cells refreshed or given a new electronic charge every few milliseconds.
Static RAM does not need refreshing because it operates on the principle of moving current that is switched in one of two directions rather than a storage cell that holds a charge in place. SRAM is generally used for cache memory, which can be accessed more quickly than DRAM. DRAM stores each bit in a storage cell consisting of a capacitor and a transistor. Capacitors tend to lose their charge rather quickly; thus, the need for recharging.
Largely used in computing applications where memory cost is critical
Program to achieve high speed operation and fully random access
Low power consumption and high speed
Auto refresh and self refresh
Extended data out