Memory cache is an external cache that is deployed or part of a computer's RAM. It is typically built using static RAM technology, which is much faster than dynamic RAM (DRAM).

Memory cache is designed to store data and programs that are frequently accessed by the central processing unit (CPU), enabling data and programs to be delivered to the computer more quickly than via standard RAM. Despite being faster than RAM, memory cache is slower than a CPU cache, primarily because it is not in close proximity to the processor.