Types of RAM

SRAM
 A type of memory chip  which is faster and requires less than dynamic memory.

DRAM
A memory chip that depends on an applied voltage to keep the stored date. 

EDO DRAM  
A type of DRAM that is faster than conventional DRAM unlike conventional DRAM which can only be access by one blog of data at a time.  

SDRAM
Synchronous dynamic random access memory is dynamic random access memory that is synchronized with the system bus. Classic DRAM has an asynchronous interface, which means that it responds as quickly as possible to changes in control inputs

DDR SDRAM
Double data rate synchronous dynamic random-access memory is a class of memory integrated circuits used in computers

RDRAM
Direct Ram bus DRAM or DRDRAM is a type of synchronous dynamic RAM. RDRAM was developed by Ram bus inc., in the mid-1990s as a replacement for then-prevalent DIMM SDRAM memory architecture

VRAM
a type of RAM used in computer display cards.