MSi X79A-GD65 (8D) can't change multiplier

on my bios I can't seem to change the multiplier. (like to 45 to get 4.5ghz clock speed)

normally in the bios it's supposed to be like this (Showing on click bios)
http://i1115.photobucket.com/albums/k543/arleneii/Capture_zpsb45e6598.png

but on my bios...