SRAM Versus DRAM :

• Both static and dynamic RAMs are volatile, that is, it will retain the information as long as power supply is applied.


• A dynamic memory cell is simpler and smaller than a static memory cell. Thus a DRAM is more dense,
  i.e., packing density is high(more cell per unit area). DRAM is less expensive than corresponding SRAM.


• DRAM requires the supporting refresh circuitry. For larger memories, the fixed cost of the refresh circuitry is more than compensated for by the less cost of DRAM cells


• SRAM cells are generally faster than the DRAM cells. Therefore, to construct faster memory modules(like cache memory) SRAM is used.