Asus P8Z77 WS - Manual (Page 94)

3-24 Chapter 3: BIOS setup
Chapter 3
3.5.3 SATA Configuration
While entering Setup, the BIOS automatically detects the presence of SATA devices. The SATA
Port items show Not Present if no SATA device is installed to the corresponding SATA port.
Scroll down to display the following items:
SATA Mode Selection [AHCI]
Allows you to set the SATA configuration.
[IDE]
Set to [IDE Mode] when you want to use the Serial ATA hard disk drives as
Parallel ATA physical storage devices.
[AHCI] Set to [AHCI Mode] when you want the SATA hard disk drives to use the
AHCI (Advanced Host Controller Interface). The AHCI allows the onboard
storage driver to enable advanced Serial ATA features that increases
storage performance on random workloads by allowing the drive to
internally optimize the order of commands.
[RAID] Set to [RAID Mode] when you want to create a RAID configuration from the
SATA hard disk drives.