ASROCK X299E-ITX/ac - Chipset Configuration

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4.6.2 Chipset Conguration
Above 4GB MMIO BIOS Assignment
Enable/disable above 4GB MemoryMappedIO BIOS assignment. is is disabled
automatically when Aperture Size is set to 2048MB.
VT-d
Intel® Virtualization Technology for Directed I/O helps your virtual machine
monitor better utilize hardware by improving application compatibility and
reliability, and providing additional levels of manageability, security, isolation, and
I/O performance.
PCIE1 Link Width
Select the link width for PCIE1.
PCIE1 Link Speed
Select the link speed for PCIE1.
PCIE ASPM Support
is option enables/disables the ASPM support for all CPU downstream devices.
PCH PCIE ASPM Support
is option enables/disables the ASPM support for all PCH PCIE devices.