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Cache

• There are two types of caching in PCs, memory caching and disk caching.
• Memory caching, AKA, cache store or RAM (Random Access Memory) Cache is made up of high-speed SRAM (static, stable). DRAM (dynamic) is used for the main memory, aka the physical memory. Memory caching works because many programs access the same data repeatedly, and this allows the computer to use the high-speed SRAM instead of the slower DRAM.
• Some computers have microprocessors which contain 8k, or 16k cache. This is called level 1 Cache. External cache memory is called level 2 Cache. Level 2 cache are composed of SRAM, but larger.
• Disk caching is