Cache memory

Cache is a small but very high speed memory located between the CPU and main memory. Because the CPU speed is much higher than the main memory, the CPU directly accesses the data from the memory and waits for a certain period of time. The Cache stores a part of the data that the CPU has just used or recycled. When the CPU uses this part of data again, it can use the cache. Called directly, this reduces the CPU's wait time and improves the system's efficiency. Cache is further divided into a Cache (L1 Cac he) and a Level 2 Cache (L2 Cache). The L1 Cache is integrated in the CPU. The L2 Cache is usually soldered to the main board in the early days. Now it is also integrated in the CPU. The common capacity is 256KB or 512KB L2 Cache.