Question

how can we add graphics card on any pc

Answer 1

Unscrew slots. Typically, a graphics card is not just plugged into a PCI-e slot on the motherboard, but it is also secured with a screw at the backside of the case. ...
Unplug power connectors. The more powerful a graphics card is, the more power it will need to work. ...
Plug out, Plug in.

Answer 2

To put graphics card fist u open the side cover of the CPU then you buy a graphics card and take a expire card and put a graphics card inside back of CD in CPU. Please give this type of questions.