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Cache Memory

We have already discussed about the Primary memory and Secondary memory. Also seen the difference between SRAM  static RAM and DRAM: Dynamic RAM. Today in this post we will discuss the cache memory.

The cache is a small amount of high-speed memory, present between the primary memory (RAM) and CPU (processor). Its access time is much less compared to that of the main memory. It is an intermediate memory and is not accessible to users. It stores instructions and data, which are to be immediately executed. It is used to reduce the average access time reading data, which are stored in main memory. Thus the cash memory increases the operating speed of the system. But it is mush costlier than main memory. There are two levels of cache memory

 L1 and L2, L1 cache memory will present inside CPU, where as the L2 cache will be present on the mother board. L1 cache is very fast since it runs at a speed of processor. L2 cache is larger but slower in speed than L1 cache.

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