What is L2 cache?
Level 2 or L2 cache is part of a multi-level storage strategy for improving computer performance. The present model uses up to three levels of cache, termed L1, L2 and L3, each bridging the gap between the very fast computer processing unit (CPU) and the much slower random access memory (RAM). While the design is evolving, L1 cache is most often built into the CPU, while L2 cache has typically been built into the motherboard (along with L3 cache, when present). However, some CPUs now incorporate L2 cache as well as L1 cache, and a few even incorporate L3 cache. The job of CPU cache is to anticipate data requests, so that when the user clicks on a frequently used program, for example, the instructions required to run that program are at the ready, stored in cache. When this happens, the CPU can process the request without delay, drastically improving computer performance. The CPU will check L1 cache first, followed by L2 and L3 cache. If it finds the needed bits of data, this is a cache
