RAM is classified into 2 major types:

- DYNAMIC RAM
- STATIC RAM

DYNAMIC RAM

Dynamic RAM (DRAM) is the cheaper of the two types so is the most common type of memory. it has a slower access speed compared to SRAM and the informatino sotred it hodls must be refresed again adn agani, which needs a continuous uniterupted flow of electric power

DRAM is made up of an array of chips arranged on a small board called a stick: this is a stick of memory:

the stick is placed in the computer's mother boards through a slot. the number of transistors making up the chps on a stick of DRAM determines the amount of information that can be stored, measured in megabytes (MB)

there are 2 types of memory sticks:

1. SIMM (SINGLE INLINE MEMORY MODULE) - this is the old type of DRAM that was used

2. DIMM (DUAL INLINE MEMORY MODULE) - this is the newest and mostly used today, it connects thru pins along both edges whcih can move more data into and out of the chips.

STATIC RAM

the other type of ram is calles static ram, SRAM is more expensive the DRAM to make. SRAM provides faster access to information because the memory does not need constant refreshing, and the chip can function for short periods without electricity. SRAM is the type of physical memory used for Level 2 processor caches and any other memory chips attached directly to the main circuit boards of the computer