Cache Memory

CACHE memory, which is also known as high speed buffer memory, operates between CPU and main memory. CPU speeds are very high compared to the access time of the main memory. To compensate for this mismatch in operating speeds, cache memory is employed whose access time is closed to the processing speed of the CPU. Being expensive, cache memory is small for storing segments of programmes and data currently being executed. It is not addressable by the user. It improves the memory transfer rate and the processing speed.