How do I install a graphics card in my HP desktop?

How do I install a graphics card in my HP desktop?
Use the following steps to install a new video card:

Insert the new video card into the proper slot. The card should slide in firmly and straight into its slot.
If the video card is agp, attach the clasp onto the card.
Attach the card with one retaining screw.
Connect all cables into their original positions.

Use the following steps to install a new video card:
  1. Insert the new video card into the proper slot. The card should slide in firmly and straight into its slot.
  2. If the video card is agp, attach the clasp onto the card.
  3. Attach the card with one retaining screw.
  4. Connect all cables into their original positions.