What is cpu cache?
Cache, on chip: Super-fast and efficient memory integrated into the processor, which it uses to store short-term, frequently accessed data. This type of memory is so zippy because it runs at the full clock speed of the processor, meaning at the gigahertz level. Cache is the first place the CPU looks for instructions. If not found, then the CPU must rely on the much slower system RAM, which operates at the megahertz level. Most CPUs today have on-chip L1 (level 1) and L2 cache. Some also have on-chip L3 cache. The L2 cache size will often be one of the main differences between CPUs. As a general rule of thumb, the larger the L2 cache, the better the performance.
