You set up virtual memory here. The difference between virtual memory and memory chip is that neither of them really exists? There is no need to install real virtual memory. As long as you use my WINDOWS system and haven't modified the relevant data, it exists in the form of a file (default directory pagefile.sys, system files need to be displayed, and hidden files need to be displayed to see it). His role is to automatically expand the memory when the memory is insufficient to meet the normal operation of the program. You can click Custom Size to set virtual memory. The maximum value ranges from the initial size to the available space. If you want to expand physical memory, you can only buy memory chips.