What are the different DRAM speed standards?
The standard systems differ depending on whether the DRAM is implemented as a component or as a memory module. Furthermore, DRAM comprises a number of different types, i.e. SDR SDRAM, DDR SDRAM, and RDRAM. • SDRAM Category Spec. External Clock Data Transfer Speed Component PC66 66MHz 66Mbps PC100 100MHz 100Mbps PC133 133MHz 133Mbps Module PC66 66MHz 500MB/s PC100 100MHz 800MB/s PC133 133MHz 1GB/s • DDR Category Spec. External Clock Data Transfer Speed Component DDR200 100MHz 200Mbps DDR266 133MHz 266Mbps DDR333 166MHz 333Mbps DDR400 200MHz 400Mbps Module PC1600 100MHz 1.6GB/s PC2100 133MHz 2.1GB/s PC2700 166MHz 2.7GB/s PC3200 200MHz 3.2GB/s • DDR2 Category Spec. External Clock Data Transfer Speed Component DDR2-400 200MHz 400Mbps DDR2-533 266MHz 533Mbps DDR2-667 333MHz 667Mbps DDR2-800 400MHz 800Mbps Module PC2-3200 200MHz 3.2GB/s PC2-4200 266MHz 4.3GB/s PC2-5300 333MHz 5.3GB/s PC2-6400 400MHz 6.4GB/s • RDRAM Category Spec. External Clock Data Transfer Speed Component PC600 300MHz 600M
