How do you go about installing a video card on a computer that originally had an integrated video card?

Install the video card. Then when you power on your pc, go into the BIOS and there should be a setup feature in the BIOS that will allow you to choose what the default video should be whether it'd be AGP, PCI or onboard. Select whatever video card you have, AGP or PCI. That should do the trick.|||the first thing you need to do is find out if you have an AGP slot or a PCI-E slot, or just a pci slot. then you have to remove the cover from your computer, MAKE SURE YOU TOUCH A METAL PART OF YOUR COMPUTER TO DISCHARGE ANY STATIC ELECTRICITY IN YOU. then remove the video card from it's package. find the correct slot on the motherboard and remove the metal cover from the back of your computer. Some are held in by a screw and some you have to bend back and forth to remove. next, carefully position the video card's connector into the slot and push down using even force. it should slide in fairly easy. there will Be a screw to attach the card to the computer with. Next, reboot your computer with the monitor still attached to the on board video, while tapping either delete or f 1 to get into the bios(we having fun yet?). navigate using enter, escape and the arrow buttons until you find the spot for the video. change the video from on board to the slot where your new card is located, and reboot. switch the monitor cable from the on board video to the video card being carefull not to bend a pin on the cable connector. if everything went as planned, your computer should boot up using your new video card.....good luck|||just install the new video card and run the computer and the built in video card will be disabled by it self that is if the new one is not PCI. if it is a PCI then you have to disable it from the BIOS. AGP and PCI-E will automatically disable the built in once.