Installing a video card is generally straightforward, but there are a couple gotchas to watch out for:
If you are installing an AGP card on a motherboard with a non-Intel chipset, you may need to install a GART driver before you physically install the video card or its drivers. Skipping this step can cause Windows to black-screen at boot. Follow the instructions supplied with the new video card to install the GART driver.
The presence of old video drivers may cause problems with the installation of the new card. You may need to use Safe Mode (press F8 while the system boots and choose Safe Mode from the menu) to uninstall the old video drivers before installing the new video card or, if the current video adapter is dead, as the first step after installing the new video card.
If you buy a retail-boxed video card, it will include a comprehensive manual. If ...