I tested the download for system/chipset drivers for that MB last night and it took about 1/2 hour. Don't use L U and download manually, select the correct one for your OS and then download.
http://www.msi.com/product/mb/970A-G46.html#/?div=Driver&os=...
http://www.msi.com/product/mb/970A-G46.html#/?div=Driver&os=...