The discrete graphics card option for that AIO is GTX 1050 but it's soldered to the board and require to replace motherboard if you want to upgrade.
Hi, good afternoon I wanted to know if the graphic card of the Optiplex 7470 can be improved by another one or if it’s compatible with a Egpu, this to be able to improve the performance while gaming   This is the characteristics of the PC Intel (R) Core (TM) i5  Ram 16 gb Intel UHD 620 graphics Windows 10    
Can a Optiplex 7470 All in One graphic card can be improved?