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Static Random Access Memory (SRAM), Static RAM, is Random Access Memory (RAM) that retains data bits in its memory as long as power is being supplied. Unlike Dynamic Random Access Memory (DRAM), which stores bits in cells consisting of a capacitor and a transistor, SRAM does not have to be periodically refreshed. Static RAM provides faster access to data and is more expensive than DRAM. SRAM is used for a computer's cache memory and as part of the random access memory digital-to-analog converter on a video card.

Source: https://whatis.techtarget.com/definition/SRAM-static-random-access-memory