There will be a screw or two on the side of your case. Follow these simple steps.
Shut down computer.
Disconnect all wires from tower and move it to a place, such as a table. where you can do the work.
Using a phillips head screwdriver remove the screw(s) holding the case together on the side that is removable (usually the left side)
Look inside the case, you will see a slot that matches your graphics card. It is called a PCI-E slot, look it up if you are unsure of what one looks like.
Remove the metal tab that is blocking the hole in front of the slot, and slightly to the side. It will either pull out or be held in by a small screw (save the screw if it is there).
Gently, but firmly, line up the graphics card's pci-e connector with the slot in the motherboard. It will require a firm, but gentle nudge to snap into place. Don't force it and make sure you are lined up. If it's seated correctly the metal slot on the front will line up with the metal tab you just removed. If you have a graphics card installed already, remove it.
Reinstall the side of the case. Connect all wires, but this time connect your monitor's connection (either DVI (white), VGA(blue) or HDMI (black and gold) to the graphic's cards video port. Power on the computer.
Here the steps can vary. If you didn't remove a graphics card earlier you need to disable the onboard graphics. I would need to know the manufacturer of your motherboard to give instructions on how to do it.
Insert the disk that came with your graphics card and install the software included with it.
on Jan 08, 2014