Dell PowerEdge C4140 EMC Installation and Service Manual - Page 46
Table 30. Slot Disablement, Table 31. Slot Bifurcation, I/O above 4 GB
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Option Description Empty Slot Unhide Enables or disables the root ports of all the empty slots that are accessible to the BIOS and OS. This option is set to Disabled by default. Memory Mapped Enables or disables the support for the PCIe devices that need large amounts of memory. Enable this option only I/O above 4 GB for 64-bit operating systems. This option is set to Enabled by default. Memory Mapped I/O Base When set to 12 TB, the system maps the MMIO base to 12 TB. Enable this option for an OS that requires 44 bit PCIe addressing. When set to 512 GB, the system maps the MMIO base to 512 GB, and reduces the maximum support for memory to less than 512 GB. Enable this option only for the 4 GPU DGMA issue. This option is set to 56 TB by default. Slot Disablement Enables or disables the available PCIe slots on your system. The slot disablement feature controls the configuration of the PCIe cards installed in the specified slot. Slots must be disabled only when the installed peripheral card prevents booting into the operating system or causes delays in system startup. If the slot is disabled, both the Option ROM and UEFI drivers are disabled. Only slots that are present on the system are available for control. Table 30. Slot Disablement Option Slot 1 Description Enables or disables the PCIe slot 1. This option is set to Enabled by default. Slot 3 Enables or disables or only the boot driver is disabled for the PCIe slot 3. This option is set to Enabled by default. Slot 4 Enables or disables or only the boot driver is disabled for the PCIe slot 4. This option is set to Enabled by default. Slot 5 Enables or disables or only the boot driver is disabled for the PCIe slot 5. This option is set to Enabled by default. Slot 6 Enables or disables or only the boot driver is disabled for the PCIe slot 6. This option is set to Enabled by default. Slot 7 Enables or disables or only the boot driver is disabled for the PCIe slot 7. This option is set to Enabled by default. Slot Bifurcation Allows Platform Default Bifurcation, Auto Discovery of Bifurcation and Manual Bifurcation Control. The default is set to Platform Default Bifurcation. The slot bifurcation field is accessible when set to Manual Bifurcation Control and is disabled when set to Platform Default Bifurcation or Auto Discovery of Bifurcation. Table 31. Slot Bifurcation Option Slot 1 Bifurcation Description x4 or x8 or x4x4x4x8 or x8x4x4 Bifurcation Slot 3 Bifurcation x4 or x8 or x4x4x4x8 or x8x4x4 Bifurcation Slot 4 Bifurcation x16 or x4 or x8 or x4x4x4x8 or x8x4x4 Bifurcation Slot 5 Bifurcation x4 Bifurcation or x8 Bifurcation Slot 6 Bifurcation x4 Bifurcation or x8 Bifurcation 46 Pre-operating system management applications
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