In the late 1980s IBM invented DDR SDRAM, they built a dual-edge clocking RAM and presented their results at the International Solid-State Circuits Convention in 1990. In 1998, Samsung released a double data rate SDRAM, known as DDR SDRAM, chip (64Mbit) followed soon after by Hyundai Electronics (now SK Hynix) the same year and mass-produced in 1993. By 2000, SDRAM had replaced virtually all other types of DRAM in modern computers, because of its greater performance.
in the late 1980s ibm invented ddr sdram they built a dual-edge clocking ram and presented their results at the international solid-state circuits convention in 1990 in 1998 samsung released a double data rate sdram known as ddr sdram chip (64mbit) followed soon after by hyundai electronics (now sk hynix) the same year and mass-produced in 1993 by 2000 sdram had replaced virtually all other types of dram in modern computers because of its greater performance