Most of the settings in the BIOS are fine to be left on auto/default - especially if you are not sure what they do.
I would recommend reinstalling windows as motherboard swaps can mess stuff up. I had to when I upgraded from a Gigabyte Z68 to a MSI Z77 despite keeping my 2550K and everything else the same.
I would recommend reinstalling windows as motherboard swaps can mess stuff up. I had to when I upgraded from a Gigabyte Z68 to a MSI Z77 despite keeping my 2550K and everything else the same.