Trends in DRaM Year Chip Bus DRAM Type Latency Produced Size Cycle New Request 1980 64 Kbit Asynchronous DRAM 250ns 1983 256 Kbit Asynchronous DRAM 190ns 1986 1 Mbit Asynchronous DRAM 140ns 1989 4 Mbit Asynchronous DRAM 110ns 1992 16 Mbit Asynchronous DRAM 90 ns 1996 64 Mbit SDRAM 10 ns 70 ns 1998 128 Mbit SDRAM 7.5ns 60 ns 2000 256 Mbit DDR SDRAM 6ns 55 ns 2002 512 Mbit DDR SDRAM 5 ns 55 ns 2004 1 Gbit DDR2 SDRAM 3 ns 50 ns 2006 2 Gbit DDR2 SDRAM 2 ns 45 ns 2010 4 Gbit DDR3 SDRAM 1.5ns 37ns 2012 8 Gbit DDR3 SDRAM 1 ns 31 nsTrends in DRAM 2021-2-4 计算机体系结构 5