Use the
AMD Preferred IO Device option to configure AMD Preferred IO Device settings.
Procedure
From the
System Utilities screen, select
System Configuration > BIOS/Platform Configuration (RBSU) > Power and Performance Options > AMD Preferred IO Device.
Select a setting.
Preferred IO Bus Number— Preferred IO can provide improved PCIe performance. Enter the PCI bus number ranging from 0 to 255 of a device to receive Preferred IO. All endpoints on the same AMD NorthBridge I/O (NBIO) will receive the same improved performance. You must set
Preferred IO Bus Number to
Enable
for this option to function.