sentences:  CAS latency has improved even less, from to 10 ns.However, the DDR3 memory does achieve 32 times higher bandwidth; due to internal pipelining and wide data paths, it can output two words every 1.25 ns , while the EDO DRAM can output one word per "t"PC = 20 ns (50 Mword/s).Each bit of data in a DRAM is stored as a positive or negative electrical charge in a capacitive structure.