For desktop brand computers, open the chassis and look at the motherboard. If there is a graphics card slot on the motherboard, you can install it. If there is no graphics card slot on the motherboard, you can't!
There is no high-definition display interface, only a VGA interface. Now mainstream monitors have DVI-D or HDMI high-definition interfaces.Therefore, DELL's product design is very wordless.
Summary:
Chinese brand machines are really poor in performance matching. If possible, we don't recommend you to buy brand machines and assemble them yourself!!!