Dell and HP do not manufacture Video cards, they simple use cards made by other companies. IF you mean put a video card from an HP computer into a dell one, then yes, you may be able to. Both the...
you connect your crt display or monitor to the video card on your computer
A video card is a computer chip you usually insert into your computer via a AGP slot inside of your computer...
Not usually. Video card memory generally consists of ROM chips soldered directly to the card, so if the graphics card goes bad, it's best to replace it.
well it depends on what kind of computer you have. its rather simple really. message me back with what kind of computer you have and I can help you further, okay? :)