RAM ( Random Access Memory)

RAM (Random Access Memory) is temporary memory it's used to stored data for CPU( Central Processing Unit) and it works when computer is turned on. There are many types of RAM(Random Access Memory):

SDRAM=Synchronus Dynamic Random Access Memory

DRAM=Dynamic Random Access Memory

DDRRAM=Dynamic Double Rate Random Access Memory

Direct RDRAM=Direct Rambus Dynamic Random Access Memory

And for nowadays the commonly use DDRRAM and there are many types of DDRRAM, E.g: DDR1, DDR2......

DDR1

DDR2&DDR3

DDR4