Chapter 6: UEFI BIOS
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IIO Configuration
IIO Configuration
EV DFX (Device Function On-Hide) Features
When this feature is set to Enable, the EV_DFX Lock Bits that are located in a proces-
sor will always remain clear during electric tuning. The options are
Disable
and Enable.
CPU1 Configuration
IOU0 (IIO PCIe Br1)
Use this feature to configure the PCI-E Bifurcation setting for a PCI-E port specified by
the user. The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and
Auto
.
IOU1 (IIO PCIe Br2)
Use this feature to configure the PCI-E Bifurcation setting for a PCI-E port specified by
the user. The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and
Auto
.
IOU2 (IIO PCIe Br3)
Use this feature to configure the PCI-E Bifurcation setting for a PCI-E port specified by
the user. The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8, x16, and
Auto
.
CPU1 AIOM PCI-E X16 (Available when the device is detected by the
system)
Link Speed
Use this feature to configure the link speed of a PCI-E port specified by the user.
The options are
Auto
, Gen 1 (2.5 GT/s), Gen 2 (5 GT/s), and Gen 3 (8 GT/s).
The following information is displayed:
• PCI-E Port Link Status
• PCI-E Port Link Max
• PCI-E Port Link Speed
PCI-E Port Max (Maximum) Payload Size
Select Auto for the system BIOS to automatically set the maximum payload value
for a PCI-E device specified by to user for system performance enhancement. The
options are 128B, 256B, and
Auto
.
