L3 cache, or Level 3 cache, is a type of memory cache that is used to store frequently accessed data and instructions to improve the overall performance of a computer's CPU. It acts as a bridge between the faster L1 and L2 caches and the slower main memory, helping to reduce latency and increase data throughput. L3 cache is usually shared among multiple CPU cores in multicore processors, which helps in maintaining consistency and efficiency in accessing data across the cores.
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