Dynamic Random Access Memory
Dynamic Random Access Memory
Dynamic Random Access Memory (DRAM) is a type of computer memory that requires periodic refreshing to maintain the data stored in its cells. Unlike SRAM, which retains data without refreshing, DRAM is less expensive and more widely used in computers.
What does Dynamic Random Access Memory mean?
Dynamic Random Access Memory (DRAM) is a type of computer memory that stores data in the Form of electrical charges on capacitors. Unlike Static RAM (SRAM), which uses flip-flops to store data, DRAM requires periodic refreshing to maintain the stored data. This is because the capacitors used to store data in DRAM slowly discharge over time, causing the stored data to be lost.
DRAM is a volatile memory, meaning that the data stored in it is lost when the power is turned off. This makes DRAM unsuitable for use as primary storage, where data needs to be retained even when the computer is turned off. However, DRAM is much cheaper to produce than SRAM, making it the preferred choice for use as main memory in computers.
Applications
DRAM is used in a wide variety of applications, including:
- Main memory in computers: DRAM is the primary type of memory used in computers to store the operating system, programs, and data that are currently being used.
- Graphics cards: DRAM is used on graphics cards to store textures, vertex data, and other data that is needed to render images.
- Mobile devices: DRAM is used in mobile devices to store apps, data, and other information.
- Server memory: DRAM is used in servers to store data that is accessed by multiple users.
History
DRAM was invented in 1966 by Robert Dennard at IBM. The first DRAM chips were only a few kilobits in size, but subsequent generations of DRAM chips have become much larger. Today, it is common to find DRAM chips with capacities of 8 gigabits or more.
The development of DRAM has been essential to the growth of the computer industry. Without DRAM, computers would be much more expensive and less powerful.