Cache

CACHE

• Is SRAM (Static RAM)
• Doesn't have to be refreshed
• A lot faster than DRAM
• Expensive

CACHE is stores copies of data and instruction from RAM, that's waiting to be used by the CPU.

On the computer has 3 level cache:

Level 1 Cache It is located on the CPU and it is the fastest cache on the computer

Level 2 Cache used to catch recent data access from the processor that were not caught by the level 1 cache. It is larger than level 1 cache ,but it is not fast as level 1 cache.

Level 3 Cache used to catch recent data access from the processor that were not caught by the level 2 cache. It is larger than level 2 cache ,but it is not fast as level 2 cache. Meanwhile it is shared between all the core in the CPU.