There are two types of Hdd ports in your mb (PATA and SATA). So your hdd can either be a PATA or SATA. Whether it is PATA or SATA the hdd can be configured in the bios to be in ide mode. However, Im not sure if you have the option to select manually AHCI mode with a PATA hdd. It is stated in your product guide that the bios will detect automatically which of the port is used and therefore the type of hdd installed. But it also stated that you can manually set it to AHCI - this might be true for SATA hdd but not PATA hdd. If you can provide further details perhaps your inquiry can be answered properly by other members of the community.