Enabling on-board graphics on an AsRock board when you have a GPU installed - YouTube
ASRock DESKMINI X300W Barebone – AM4 Socket | 2 x SO-DIMM DDR4 Slot (Max 64GB) | 1x HDMI 4K@60Hz | 1 x DP, D-Sub | 2 x 2.5inch SATA Slot | 1 x M.2 2280 Gen3 Slot – QWERTY Computers
ASRock DESKMEET X300 Mini PC Barebone System AMD X300 DisplayPort, HDMI & D-Sub Supports a discrete Dual slot Graphics card up to 20CM(card not included) 8 Liter compact size Mini-PC Barebone -