The best and simplest way to use a SATA drive as a non-RAID boot drive with this motherboard is to install a PCI SATA controller card.
Theoretically, you are supposed to be able to use a SATA drive as a boot device. However, since both SATA controllers are designed on the assumption they will be used for RAID arrays, you can't set up the system to boot from either SATA controller unless you first set up a RAID array.
We went round and round with this on a system. We finally ended up installing an IDE drive to boot off of, and then use the SATA as a data drive.
Windows however does not keep the driver for the SATA controller and we end up installing the drive every time we boot.
Chas