Dell PowerEdge C4140 EMC Installation and Service Manual - Page 46

Table 30. Slot Disablement, Table 31. Slot Bifurcation, I/O above 4 GB

Page 46 highlights

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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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
I/O above 4 GB
Enables or disables the support for the PCIe devices that need large amounts of memory. Enable this option only
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
Description
Slot 1
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
Description
Slot 1 Bifurcation
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