Hi, I have been cracking my head for the past 2 days since upgrading to Haswell with the GA-Z87X-UD3H mobo. I am unable to install Win 8 64bit. This is despite installing the provided AHCI drivers before installation. During first boot, it will fail to startup. Any further attempts to restart my comp will result in error startup messages. When I install Win8 in IDE mode it works fine. What bios settings should I use when installing Win 8 64?