very high-speed random access memory used in high-quality video cards, VRAM memory (Computers)
Dynamic random access memory (DRAM) is a type of
random access memory that stores each
bit of data in a separate
capacitor within an
integrated circuit. Since real capacitors leak charge, the information eventually fades unless the capacitor charge is refreshed periodically. Because of this refresh requirement, it is a dynamic memory as opposed to
SRAM and other static memory. Its advantage over SRAM is its structural simplicity: only one transistor and a capacitor are required per bit, compared to six transistors in SRAM. This allows DRAM to reach very high
density. Like SRAM, it is in the class of
volatile memory devices, since it loses its data when the power supply is removed.
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