Table 4. Device and I/O ports details (continued)
PCI 64-Bit Resource Allocation
• Enable
• Disable
• Auto
[Enable] or [Disable] the allocation of 64-bit resources for
PCI. Auto is the default setting, would allocate some
resources below 4GB for legacy compatibility.
MM Config Base
• 3GB
• 2GB
• 1GB
Recommend default setting of 3GB. A higher value will
increase memory available to the OS below 4G but
reduce memory mapped I/O (MMIO) resource available to
PCI adapters. A lower than 3GB value will increase MMIO
resources but decrease memory available to OS below
4GB. Revert to your previous selection if you see new
issues with changed setting.
Intel® VT for Direct I/O (VT-d)
• Enable
• Disable
[Enable] or [Disable] Intel® Virtualization Technology for
Directed I/O (VT-d) by reporting the I/O device
assignment to VMM through DMAR ACPI Tables. Enable
is the default setting.
SRIOV
• Enable
• Disable
[Enable] or [Disable] the support of resource allocation for
virtual functions of Single Root I/O Virtualization (SR-IOV)
during boot.
Enable/Disable Onboard
Device(s)
N/A
Enable or disable onboard devices or slots.
Enable/Disable Adapter Option
ROM Support
N/A Control Legacy and UEFI-compliant adapter support.
Disabling UEFI/Legacy support may adversely affect pre-
boot/boot functions.
Set Option ROM Execution
Order
N/A Control legacy ROM load order.
PCIe Gen1/Gen2/Gen3 Speed
Selection
N/A Choose the generation speed for available PCIe slots.
Console Redirection Settings N/A Settings for console redirection and COM port settings.
USB Configuration N/A Disable USB storage devices or individual ports.
Intel® VMD technology N/A Press Enter to bring up the Intel® VMD for Volume
Management Device Configuration menu.
Note: Settings in this menu vary with models and configurations.
Enable/Disable Onboard Device(s)
Item
Options
Description
Onboard Video
• Enable
• Disable
Disabling an entry will prevent the associated device from
being enumerated during subsequent boots. Enable is
the default setting. [Auto] is removing the port if there is
no device or errors on that device.
Note: [Auto] is the setting for PCIe devices by CPU only.
Onboard SATA
• Enable
• Disable
Disabling an entry will prevent the associated device from
being enumerated during subsequent boots. Enable is
the default setting. [Auto] is removing the port if there is
no device or errors on that device.
Note: [Auto] is the setting for PCIe devices by CPU only.
10 ThinkSystem Server with Intel Xeon SP (1st, 2nd Gen) UEFI Manual
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