"The Level 3 cache is designed to handle data requests that the Level 1 and Level 2 caches fail to satisfy. Although slower than the Level 2 cache, the Level 3 cache compensates by being much larger in size. While the largest Level 2 cache at this time is only 5 MB, Level 3 caches can be as large as 45 MB!
Irrespective of the actual numbers, the larger size of the Level 3 cache allows it to store a lot more data than the Level 2 cache. This gives it a high probability of satisfying cache misses from the Level 2 cache. With three caches working together, the chance of the processor stalling due to..."
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