L1 cache
A level 1 cache (L1 cache) is an internal cache built into the CPU chip.

L2 cache
A level 2 cache (L2 cache) is an external cache of memory chips plugged into the motherboard. Both types are routinely used together.
The larger the L2 cache, the better. However, whether you will notice any significant improvement in performance between a 128K and 256K cache for example, depends on your applications. The mix of instructions within the program determines how efficient the cache will be. Since this is an unknown, only comparing the same application on identical machines with different caches will tell. In addition, one motherboard manufacturer can design its cache circuits better than another.


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