Supermicro SuperServer SYS-122H-TN User Manual page 181

Note: The number of PCIe slots and the slot naming can differ depending on the PCIe
devices connected to your motherboard.
Requested Link Speed
Use this feature to configure the link speed for the PCIe port you specified. The options are
Auto, Gen 1 (2.5 GT/s), Gen 2 (5 GT/s), Gen 3 (8 GT/s), Gen 4 (16 GT/s), and Gen 5 (32
GT/s).
The following information is displayed.
Max Link Width
l
Current Link Width
l
Current Link Speed
l
PCIe Port Max Payload Size
Use this feature to configure the maximum payload size supported in Direct Media
Interface (DMI) device capabilities register for the device installed in the PCIe port. The
options are 128B, 256B, 512B, and Auto.
MCTP
Enable this feature, Management Component Transport Protocol (MCTP), to support
communications between devices in a platform management subsystem. MCTP's
underlying device buses include SMBus/I
Disabled and Enabled.
Intel VMD Technology
When this feature is set to Enabled, VMD support will be automatically enabled when a
VROC key is detected by the BIOS. The options are Disabled and Enabled.
Intel VT for Directed I/O (VT-d) Menu
►Intel VT for Directed I/O (VT-d)
Pre-boot DMA Protection
Select Enabled to establish DMA protection during pre- boot processing by setting DMA_
CTRL_PLATFORM_OPT_IN_FLAG in the DMAR ACPI table. The options are Enabled and
Disabled. (DMA is the abbreviation for Direct Memory Access. DMAR is the abbreviation for
DMA Remapping Reporting.)
SuperServer SYS-122H-TN: UEFI BIOS
2
C, serial links, PCIe, and USB. The options are
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