Hi,
the reason we say to download the drivers from the Gigabyte website is because they are usually more up-to-date than the ones on the CD that comes with the motherboard.
If you are happier using the CD and then updating the drivers then that is also OK.
If you decide to download teh latest drivers from Gigabyte you can find them here:
http://www.gigabyte.com/products/product-page.aspx?pid=3628&dl=1#dl you just need to pick your OS from the drop down box.
I have found the best way is not to use the install disk and to load each driver individually. Depending on what you are actually using my suggestion would be to:
Load AMD Chipset Driver
VGA Driver (only if using on-board graphics chip. If you are using a dedicated Graphic Card then download the latest drivers from AMD)
Realtek LAN Driver
USB3 Driver
Realtek Audio drivers.
It is also a good idea to reboot after you install each driver as this can pinpoint any problems that you may encounter.