Asus M4A79XTD EVO/USB3 - Manual (Page 66)

3-10 Chapter 3: BIOS setup
Chapter 3
32Bit Data Transfer [Enabled]
[Enabled] Sets the IDE/SATA controller to combine two 16-bit reads from the hard
disk into a single 32-bit double word transfer to the processor. This makes
more efficient use of the PCI bus as fewer transactions are needed for the
transfer of a particular amount of data.
[Disabled] Disables this function.
OnChip SATA Type [IDE]
Allows you to set the SATA configuration. This item appears only when you enable the
OnChip SATA Channel item.
[IDE]
Set to [IDE] when you want to use the Serial ATA hard disk drives as
Parallel ATA physical storage devices.
[RAID] Set to [RAID] when you want to create a RAID configuration from the SATA
hard disk drives.
[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.
When this item is set to [AHCI], only SATA connectors 1–4 can be detected. Ensure that
you’ve installed the AHCI driver, so that you could use SATA connectors 1–6 in AHCI mode
under OS.
OnChip SATA Channel [Enabled]
[Enabled] Enables the onboard channel SATA port.
[Disabled] Disables the onboard channel SATA port.
The following item appears only when you enable OnChip SATA Channel.
3.4.2 Storage Configuration
The Storage Configuration menu allows you to configure your storage devices. Select an item
then press to display the submenu.
BIOS SETUP UTILITY
Main
Storage Configuration
OnChip SATA channel [Enabled]
OnChip SATA Type [IDE]
Options
Disabled
Enabled