ASROCK PRO Series User Manual page 85

Configure DMI Slot Link Speed. Auto mode is optimizing for overclocking.
PCIE1 Link Speed
Select the link speed for PCIE1.
PCIE2 Link Speed
Select the link speed for PCIE2.
PCIE3 Link Speed
Select the link speed for PCIE3.
PCIE4 Link Speed
Select the link speed for PCIE4.
PCI Express Native Control
Select Enable for enhanced PCI Express power saving in OS.
PCIE ASPM Support
This option enables/disables the ASPM support for all CPU downstream devices.
PCH PCIE ASPM Support
This option enables/disables the ASPM support for all PCH PCIE devices.
DMI ASPM Support
This option enables/disables the control of ASPM on CPU side of the DMI Link.
PCH DMI ASPM Support
This option enables/disables the ASPM support for all PCH DMI devices.
Share Memory
Configure the size of memory that is allocated to the integrated graphics processor when
the system boots up.
IGPU Multi-Monitor
Select disable to disable the integrated graphics when an external graphics card is installed.
Select enable to keep the integrated graphics enabled at all times.
Inte(R) Ethernet Connection I219-V
Enable or disable the onboard network interface controller (Intel® I219V).)
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