Asus Prime X299-A II, Manual

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Chapter 3: BIOS Setup
Chapter 3
3.6.4 PCH Configuration
The items in this menu allow you to adjust the PCH PCIe speed.
PCI Express Configuration
This item allows you to configure the PCIe slots.
PCIe Speed
This item allows your system to automatically select the PCIe port speed.
Configuration options: [Auto] [Gen 1 (2.5 GT/s)] [Gen 2 (5 GT/s)] [Gen 3 (8 GT/s)]
3.6.5 PCH Storage 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.
SATA Controller(s)
This item allows you to enable or disable the SATA Device.
Configuration options: [Disabled] [Enabled]
SATA Mode Selection
This item allows you to set the SATA configuration.
[AHCI] Set to [AHCI] 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.
[Intel RST Premium
(RAID)]
Set to [Intel RST Premium (RAID)] when you want to create a
RAID configuration from the SATA hard disk drives.
SMART Status Check
SMART (Self-Monitoring, Analysis and Reporting Technology) is a monitoring system that
shows a warning message during POST (Power-on Self Test) when an error occurs in the
hard disks.
Configuration options: [On] [Off]
SATA6G_1 - SATA6G_8
SATA6G_1 - SATA6G_8
This item allows you to enable or disable the selected SATA port.
Configuration options: [Disabled] [Enabled]
Hot Plug
These items appears only when the SATA Mode Selection is set to [ AHCI ] and allows
you to enable or disable SATA Hot Plug Support.
Configuration options: [Disabled] [Enabled]