Page "Static random-access memory" Paragraph 19

SRAM is more expensive, but faster and significantly less power hungry ( especially idle ) than DRAM.

It is therefore used where either bandwidth or low power, or both, are principal considerations.

SRAM is also easier to control ( interface to ) and generally more truly random access than modern types of DRAM.

Due to a more complex internal structure, SRAM is less dense than DRAM and is therefore not used for high-capacity, low-cost applications such as the main memory in personal computers.