When the drivers’ installation completes ... then look for the SATA Operation option and change it to AHCI if it is set to RAID. Finally, save the settings and start your computer.

MSI Intel Rapid Storage Technology for SATA RAID and AHCI mode On-Board PIDE/SATA Driver. OS: Windows XP/Vista/7. Category: Storage Devices.

This driver provides support for high-capacity & fault-tolerant Serial ATA (SATA) RAID 5 arrays and high-performance ... It also provides AHCI support on select Intel® 4 Series, 3 Series ...