That is, a graphics card is integrated in the CPU, and if your motherboard also has an integrated graphics card, and an independent graphics card is installed, it is equivalent to three graphics cards. But the default work is the independent graphics card, the working order is, if there is no independent graphics card, it is the integrated graphics card on the motherboard, and finally the graphics card on the CPU.
It means separate graphics card
\"Single display\" refers to the independent graphics card, which is the display chip and related devices made into a board card independent of the computer motherboard and become a professional image processing hardware device.