Mmmm, probably you have the right ones then. You've got OC Guru ? It says in the bar on top of the OCG screen wich drivers you use and what bios version, you can tell me what it says ?
Bios flash isn't really hard ;
Just do a "clean" install of your new drivers and than run the bios utility, when you downloaded and installed the bios flash program from Gigabyte you have an icon now on your desktop with Gigabyte VGA Bios, first back up your old bios with the utility and than check if that version is older, you check it by running " flash ", also with the utility, it will explain itself. When you have to check the version you will see acouple of files, one like GV-N560SO-1GI-900, you can click on that file, then open. It will than maybe say ; the bios version is the same. This means you have got the latest version allready and when it doesn't it will flash to the newest bios. Even i could do it so it can't be really hard. Good luck !
Hope you understand my crappy explanation.