It refers to the amount of memory configured in the machine. Generally, the desktop configuration has a memory capacity ranging from 128M-1G. There are special-purpose machines with more than 2G of memory. The type of memory and frequency of operation have a certain impact on performance, but in contrast, the impact of capacity is even greater. Under the same conditions of other configurations, the larger the memory is, the higher the performance of the machine is. For common homes and daily work, the current mainstream configuration is 512M. For large pictures and data processing, it is generally recommended that the configuration be better than 1G.