Many cards that plug into expansion slots have or have had jumpers that allow for some user configuration. In some cases the video card jumpers are used to allow the user to "map" the memory addresses of the video card memory into computer memory and another jumper allows the user to select an interrupt. The video memory address allows the video card memory to look like ordinary RAM and the computer is able to write directly to video RAM as it would ordinary RAM. The interrupt vectors of some cards allow the expansion device to send an interrupt when there is some kind of data that is ready to be transferred. You would have to read more about the specific expansion card to find out more about the jumpers. Most of the newer video cards are built into the motherboard and even the ones that aren't are pretty much plug-and-play, and there is little that has to be done to make them work other than finding the correct driver if one isn't included.
Configuring the BIOS for the video card being installed Physically installing the video card Installing drivers for the video card Remove old video card from your computer (if you use on-board skip this step) Attach the new video card to your computer. Start Computer using on-board video and install drivers. Attach monitor to new card, if it still doesn't work disable on-board video in your bios. If everything is installed properly and computer has significant power graphics card should work properly.
A video card many times will be the top card, that being the card nearest to the inputs such as USB, sound jacks and PS/2 ports. Usually this slot is an AGP or PCI Express slot. But not always. A surefire way to find the video card is to check for a DVI/VGA output on the card. That is almost always the video card. Usually a video card will have an active fan on it as well with a larger heat sink.
The main way to tell which expansion card is the video card is to look at the plug. If it has a VGA socket, a display port socket, HDMI, etc., then you will know it is a video card. You may identify some of the chips on the card as being RAM, or you might find a fan on it, but these features are not exclusive to video cards. If that is the place where you plug your monitor, then it is a video card, unless of course you are plugging directly into the motherboard.
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