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SATA may need to be enabled in the BIOS and the drives will not show in the main BIOS screen. The SATA ports are controller by the VIA VT8237R controller.

In the BIOS, under the Advanced menu tab, and under the Onboard Devices Configuration you will need to enable the OnChip SATA. When you save this into the BIOS, another BIOS screen will pop up after the system BIOS. This is for the SATA controller. It will show the drive there.

After you boot into Windows you will possibly need to install the drivers for the SATA controller then Windows will see the drive and you will be able to partition and format it from there.
The drivers should be located on the CD that came with the motherboard.