Supermicro X11DPS-RE User Manual page 95

PassThrough DMA
Select Enable for the Non-Isoch VT-d engine to pass through DMA (Direct Memory Access)
to enhance system performance. The options are Enable and Disable.
ATS
Select Enable to enable ATS (Address Translation Services) support for the Non-Isoch VT-d
engine to enhance system performance. The options are Enable and Disable.
Posted Interrupt
Select Enable to support VT_D Posted Interrupt which will allow external interrupts to be
sent directly from a direct-assigned device to a client machine in non-root mode to improve
virtualization efficiency by simplifying interrupt migration and lessening the need of physical
interrupts. The options are Enable and Disable.
Coherency Support (Non-Isoch)
Select Enable for the Non-Isoch VT-d engine to pass through DMA (Direct Memory Access)
to enhance system performance. The options are Enable and Disable.
Intel® VMD Technology

This section describes the configuration settings for the Intel Volume Management Device
(VMD) Technology.
Note: After you've enabled VMD in the BIOS on a PCIe slot of your choice, this PCIe
slot will be dedicated for VMD use only, and it will no longer support any PCIe device.
To re-activate this slot for PCIe use, please disable VMD in the BIOS.
Intel® VMD for CPU1

Intel®
VMD for CPU1 PStack0
Intel® VMD for Volume Management Device for PStack0
Select Enable to enable Intel Volume Management Device Technology support for the
stack specified by the user. The options are Disable and Enable.
Note: When this option is set to Enable, the following two items will display.
CPU1 Slot1 PCI-E 3.0 x8 VMD
Select Enable to enable Intel Volume Management Device Technology support for the
root port specified by the user. The options are Disable and Enable.
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Chapter 4: UEFI BIOS