General control of LED display, using an industrial computer. It has the characteristics of sturdiness, shockproof, moistureproof, dustproof, high-temperature resistant multi-slot, and easy expansion. The hardware configuration of the host is not high, but for the smart LED screen that needs to play video, the graphics card is high. The graphics card must be equipped with an independent dual-output graphics card. The purpose of the dual output is to be used as two output terminals.  Generally, we classify according to the resolution of LED display screens: LED display below 640*480 uses 32M memory, LED display below 800*600 uses 64M memory, LED display below 1024*768 uses 128M memory. The LED display below 1024 uses 256M video memory, the LED display below 1920*1080 (2K) uses 512M video memory, and the LED display resolution under 4K uses 1G video memory.