
24 Fundamentals of Computer Programming and IT
time lag between a request and the action being performed), and does not need to be refreshed. However, it is
large and expensive, requir
es more power to operate, and produces a lot of heat. DRAM is simple, small, and
space efficient. It may be slower and may have a longer latency than SRAM, but it is still very useful. Typical
access time of SRAM is 25 nanoseconds while of DRAM 60 nanoseconds.
SRAM is useful for low amount of memory. Anything over 4 MB is very bulky. SRAM is good for internal
memory in processors, and cache, but DRAM is best for system’s main memory. DRAM is used where its small ...