hey mate, i was able to get it working. All you have to do is update the BIOS, download the express install version and reboot when finished.
I have the exact same problem on a Gigabyte Z68MX-UD2H-B3.
I updated to the latest bios and still no dice.
Each time I build the OS, enable the SSD caching everything's great until reboot then the raid drives are not available.
I have to start from scratch and try again.
I finally gave up and setu two 64GB SSD in raid for my system drive but i'd still like to get this worked out.
Has anyone heard of this or have a solution?
You can't change IDE To AHCI without changing some things in the registry. search microsoft about changing to AHCI after OS is Install.
if you want to change back to AHCI you'd have to reinstall windows.