Dynamic random-access memory
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Dynamic random-access memory is a type of random-access semiconductor memory that stores each bit of data in a memory cell. A DRAM memory cell usually consists of a microscopic capacitor and a transis
A die photograph of the Micron Technology MT4C1024 DRAM integrated circuit (1994). It has a capacity of 1 megabit equivalent to 220 bits or 128 KiB.
Motherboard of the NeXTcube computer, 1990, with 64 MiB main memory DRAM (top left) and 256 KiB of VRAM (lower edge, right of middle)
A 16 MB EDO DRAM module made by Samsung Electronics
A 512-MBit Qimonda GDDR3 SDRAM package
Static random-access memory
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Static random-access memory is a type of random-access memory that uses latching circuitry to store each bit. SRAM is volatile memory; data is lost when power is removed.
Dynamic random-access memory
…capacitors, restoring them to their original charge. This refresh process is the defining characteristic of dynamic random-access memory, in contrast to static random-access memory (SRAM) which does not require data to be refreshed. Unlike flash memory, DRAM is volatile memory (as opposed to non-volatile memory), since it loses…
A static RAM chip from a Nintendo Entertainment System clone (2K × 8 bits)
Imaged by scanning electron microscope; cell topology is clearly visible
Imaged by optical microscope