yes, you can install a graphics card if you have integrated graphics, but make sure if its a gaming graphics card that your power supply has either 2 or more molex cables or a pci-e power cable and that it meets or exceeds the minimum wattage for your graphics card. if you have all those boxes ticked, install your graphics card remembering that it may need a pci-e power cable, then install drivers. if you get any errors on games talking about not being able to render, then you will need to go into your bios and transfer graphics to pci-e or dedicated (usually found in peripherals or graphics section) these are all the possible scenarios and i hope this helped. one last thing, what graphics card are you getting or are you just curious?