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Difference between RAM and ROM,Static RAM vs Dynamic RAM

This page covers difference between RAM and ROM.It also covers difference between static RAM and Dynamic RAM.


The memories are of two types. These include primary memories and secondary memories. RAM and ROM are types of primary memory. Semi random and serial access are types of secondary memory.

Examples of semi random memories include all disc memories such as CDs, DVDs etc. Examples of serial access memories include magnetic tape, magnetic bubble ferrite core, CCD etc.

RAM ROM
It is read/write memory It is read only memory
It is volatile memory i.e. used for temporary data storage It is used for permanent data storage


Static RAM Dynamic RAM
Data is stored like flipflop(FF) Data is stored in MOS capacitor
BJT, MOSFET is used MOSFET is used
It is faster in operation It is slower in operation
Power dissipation is more Power dissipation is low
Density is less Density is higher
Used as cache memory Used as main memory
No refreshing is needed Refreshing is needed

Also refer MRAM vs SRAM vs DRAM which compares MRAM, SRAM and DRAM and mentions difference between MRAM, SRAM and DRAM types.

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