Either it would come with a DVD like clutchc said, or you can use a free program that installs the driver for you. You can burn the image on a DVD its like 4.3 or 4.2GB
Try this if you have a spare DVD around and don't have the MB DVD. The program doesn't require internet thats why its 4gb. Just saying if you were curious.
http://drp.su/download.htm
Click on Download via torrent under DriverPack Solution 13 build for DVD
and use a free program, something like poweriso to burn it to a DVD. If you don't have a dvd, open the iso with winrar and drag it to a USB then use it that way