Devices and I/O Ports

[Auto]: The system assigns the value automatically.

A higher value increases memory available to the operating system below 4GB, but reduces memory mapped I/O (MMIO) resource available to PCI adapters. A lower value increases MMIO resources but decreases memory available to the operating system below 4GB.

If there is any issue occurred after changing the setting, you can revert to the previous selection.

Set the MMIOH High base address. This setting can be configured with a value which is higher than the total memory installed, including any CXL memory.

Select the available granularity size used to assign MMIO high resources. Per stack MMIO high resource assignments are multiples of the granularity where 1 unit per stack is the default allocation.

Enable or disable support of resource allocation for Single Root I/O Virtualization (SR-IOV) virtual functions during system boot.

Resizable Base Address Register (BAR) is a PCIe capability. It essentially allows the compatible PCIe devices to negotiate more BAR resource from system, resulting in improved performance.

Enable or disable the DMA Control Opt-In Flag (DMA_CTRL_PLATFORM_OPT_IN_FLAG) in DMA Remapping (DMAR) ACPI table.

This item is not compatible with Direct Device Assignment (DDA).

Enable or disable Direct Memory Access (DMA) protection in pre-boot environment.

Enable or disable onboard devices or slots.

Enable or disable UEFI-compliant adapter support. Disabling UEFI support may adversely affect pre-boot/boot functions

Choose the generation speed for the available PCIe slots.

This setting is used to override the bifurcation setting of the physical x16 slot to support the adapter with multiple devices.

Choose whether to suppress the PCIe link degraded error for available PCIe slots.

Configure console redirection and COM port settings