Where is video card in dell inspiron 530 located

the question is, " is the Video card integrated in the motherboard or built-out?"
built out means an external GPU which is always installed in a PCI Express Slot, just remove the side cover of the Dell machine and you'll find it installed.
if you want to change the integrated card you'll have to buy a PCI Express graphics card
if you want to change the PCI Express card tell me the model of the current one and i will try to help

If you do not see a discrete video card then you have integrated graphics. You can just add a video card and be fine. What is you budget? I'd suggest the 5670 at most.

see the dell link all on dell 530 desktop http://support.dell.com/support/edocs/systems/inspd530/...