ignore the upload date, im sure these weren't there a couple of days ago?
but good news anyway.
790FX-GD70
http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1740
790GX-GD65
http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1739
770-G45
http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1937
but good news anyway.
790FX-GD70
http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1740
790GX-GD65
http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1739
770-G45
http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1937