Perhaps I'm confused but my new MSI 760GM-P33 has six SATA 2 connectors but the AMI BIOS has no ACHI selection. And the BIOS upgrades do not mention adding AHCI. My Corsair Force 60 is recognized as a SATA 2 HDD. When this SSD was installed my Gigabyte board with an Award BIOS and set to AHCI I got a WIN 7 cpu index of 7.6, with the MSI board the index score is 6.7. Something isn't right.
Borrowed from Wikipedia "As their standard interface, SATA controllers use the AHCI (Advanced Host Controller Interface), allowing advanced features of SATA such as hotplug and native command queuing (NCQ). If AHCI is not enabled by the motherboard and chipset, SATA controllers typically operate in "IDE emulation" mode, which does not allow features of devices to be accessed if the ATA/IDE standard does not support them."
Is it possibly under raid settings in integrated peripherals menu!