No you can not. you can not download a graphic card because that is a phyiscal hardware on the computer. Also trying to use a graphic card driver for a differnt model and/or manufacturer will causes the screen not to load at all.Also if you try to remove the graphic card without putting in a new one, you will ether not get a port to display any video or would switch back to the video in the chipset if the chipset can do that.