Random-access memory
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Random-access memory is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code. A random-access memory device allows data
Example of writable volatile random-access memory: Synchronous dynamic RAM modules, primarily used as main memory in personal computers, workstations, and servers.
A 64 bit memory chip die, the SP95 Phase 2 buffer memory produced at IBM mid-1960s, versus memory core iron rings
8GB DDR3 RAM stick with a white heatsink
These IBM tabulating machines from the mid-1930s used mechanical counters to store information.
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