User Manual
32
PRIME X399-A BIOS Manual
SB PCIE Link Mode
This item allows you to set the Southbridge link speed. Conguration options: [Auto] [GEN 1]
[GEN 2]
PCIEX16_1 Bandwidth
[X16 Mode] The PCIe x16_1 slot runs at x16 mode.
[PCIe RAID Mode] The four PCIe x16 slots all run at x4 mode, which allows you to create a
RAID array of up to 4 PCIe devices.
Use PCIe RAID Mode when installing the Hyper M.2 x16 card or other M.2 adapter cards.
Installing other devices when using PCIe RAID Mode may cause your PC to fail to boot up.
PCIEX16_2 Bandwidth
[X8 Mode] The PCIe x16_2 slot runs at x8 mode.
[PCIe RAID Mode] The PCIe x16_2 slot runs at x4 mode, which allows you to create a RAID
array of 2 PCIe devices.
PCIEX16_3 Bandwidth
[X16 Mode] The PCIe x16_3 slot runs at x16 mode.
[PCIe RAID Mode] The four PCIe x16 slots all run at x4 mode, which allows you to create a
RAID array of up to 4 PCIe devices.
PCIEX16_4 Bandwidth
[X8 Mode] The PCIe x16_4 slot runs at x8 mode.
[PCIe RAID Mode] The PCIe x16_4 slot runs at x4 mode, which allows you to create a RAID
array of 2 PCIe devices.
Asmedia USB 3.1 Controller
[Disabled] Disables the controller.
[Enabled] Enables the rear USB 3.1 controller.
USB Type C Power Switch for U31G2_1 / U31G2_EC1
[Auto] The system will automatically detect your USB Type C devices and provide
suitable power if needed.
[Enabled] The USB Type C port will always provide power to your devices.
RGB LED lighting
When system is in working state
This item allows you to turn the RGB LED lighting on or off when the system is in the
working state. Conguration options: [On] [Off]
When system is in sleep, hibernate or soft off states
This item allows you to turn the RGB LED lighting on or off when the system is in the
sleep, hibernate or soft off states. Conguration options: [On] [Off]
Intel LAN Controller
This item allows you to enable or disable the Intel LAN controllers. Conguration options:
[On] [Off]