With all the parts for your new computer already purchased, the motherboard and power supply attached, it's time to plug in the rest of the hardware, including the graphics card.
When purchasing a video card, be sure to check with your dealer to make sure it is compatible with your motherboard and your monitor connector. A competent consultant will help you choose the device that best suits your requirements.
Modern system units use the PCI-E ("Pi-C-I Express") connector standard. The fourth generation PCI-E is now in use. Nowadays, almost all computer "stuffing" works on this standard. Older graphics cards plug into the AGP (AGP) slot.
Remove the cover from the computer case by loosening the screws. Lay the system unit on its side on a flat surface. Locate the video card slot. It is usually labeled PCI-E. Most often, the video card slot has a small latch that needs to be pushed aside when installing the device. The computer must, of course, be turned off when installing a new graphics card. Otherwise, both the motherboard and the video card will burn out.
You can also install a video card in a laptop. There are special mobile cards for this. But in case of emergency, you can use an ordinary video card for desktop PCs using a special adapter. True, the profitability and convenience of such a modification is highly questionable.