Two groups of extremely fast memory chips that allow your computer to operate faster. Internal cache (L1) is built into the CPU, and external cache (L2) resides on the motherboard. Both L1 and L2 store data recently used by the CPU. When the CPU needs data, it first checks the fastest source — L1. If the data is not there, the CPU checks the next-fastest source — L2. If the data still cannot be found, a time-consuming search of the slower RAM is required. Note: L2 cache is also called SRAM.
