Disable the graphics card in the computer's bios. If it's an older computer, disable in device manager, then install your new card.
right now i have an integrated graphics w/ 64 MB shared video memory (thats what it says on the sticker). im not sure what the exact name of it is. i just bought an Nivdia FX5700LE 256 MB graphics card for 100 bucks. i need to uninstall the card thats already in my computer. but i dont know where its located. how do i find out? thanks.