A type of static RAM (SRAM) that is not synchronized with the system clock. Like static RAM in general, asynchronous static RAM, or async SRAM, is used in a computer’s L2 cache—the special portion of memory used for storing frequently accessed information. Because this type of static RAM is not synchronized with the clock, the CPU must wait for data requested from the L2 cache. Asynchronous static RAM is faster than main memory but not as fast as synchronous burst static RAM or pipeline burst static RAM. Also called: async SRAM. See also L2 cache, static RAM. Compare dynamic RAM, pipeline burst static RAM, synchronous burst static RAM.