LOM and PCIe Slots
The following table lists the LOM and PCIe BIOS settings that you can configure through a BIOS policy or the default BIOS settings:
Name |
Description |
Supported Attributes |
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Versions |
Platforms |
Values |
Dependencies |
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ACS Control GPU n where n varies from 1-14 |
Access Control Services (ACS) allow the processor to enable or disable peer-to-peer communication between multiple devices for GPUs. . |
4.0(4), 4.1(1) |
C480 M5 |
Enabled, Disabled
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CDN Support for LOM |
Whether the Ethernet Networking Identifier naming convention is according to Consistent Device Naming (CDN) or the traditional way of naming conventions. |
4.0(4), 4.1(1) |
C480 M5, B200 M6, X210c M6, X210c M7, X410c M7 |
Enabled, Disabled, LOMs only
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External SSC Enable |
This option allows you to Enable/Disable the Clock Spread Spectrum of the external clock generators. |
4.1(2) |
B480M5, B200M5, S3X60M5, C220 M7, C240 M7, X210c M6, X210c M7, X410c M7 servers. |
Enabled, Disabled, 0P3_Percent, 0P5_Percent, Hardware, Off |
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IIO eDPC Support |
This option allows a downstream link to be disabled after an uncorrectable error, making recovery possible in a controlled and robust manner. |
4.2(1), 5.0(1), 5.0(2) |
C220 M6 and C240 M6, B200 M6, X210c M6, C220 M7, C240 M7 |
Disabled, On fatal error, On fatal and non-fatal error |
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LOM Port n OptionROM, where n ranges from 0-3. |
Whether Option ROM is available on the LOM port n |
4.0(4), 4.1(1), |
C220 M6 and C240 M6C220 M5, C240 M5, C480 M5 |
Disabled, Enabled, Legacy only, UEFI only
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All Onboard LOM Ports |
Whether all onboard LOM ports are enabled or disabled. |
4.0(2), 4.0(4), 4.1(1), |
C220 M5, C240 M5 C480 M5 |
Disabled, Enabled
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If set as Disabled, then LOM Port 0 OptionROM and LOM Port 1 OptionROM are Disabled. If set as Enabled, then LOM Port 0 OptionROM and LOM Port 1 OptionROM are Enabled. |
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All PCIe Slots OptionROM |
Whether all PCIe OptionROM ports are enabled or disabled. |
4.0(2), 4.0(4), 4.1(1), |
C220 M5, C240 M5, C480 M5, |
Disabled, Enabled, Legacy only, UEFI only
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PCI ROM CLP |
Whether all PCI ROM CLP ports are enabled or disabled. |
4.0(2), 4.0(4), 4.1(1), |
C220 M5, C240 M5, C480 M5, |
Disabled, Enabled
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PCIe ARI Support |
Whether all ARI support ports are enabled or disabled. |
4.2(1) |
C225 M6 and C245 M6 |
Disabled, Enabled, Auto
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PCIe PLL SSC Percent |
Whether all PCIe PLL SSC ports are enabled or disabled. |
4.1(2) |
C220 M5, C240 M5 servers, C220 M6, C240 M6 servers, X210c M6 servers, C220 M7, C240 M7, X210c M7, X410c M7 servers. |
0–255 (Unit is (n/10)%) |
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MRAIDn Link Speed where n ranges from 1-2. |
This option allows you to restrict the maximum speed of MRAID. |
4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C225 M6, C245 M6, C240 M7 |
Auto, Disabled, Enabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5
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MRAID n OptionROM where n ranges from 1-2. |
Whether Option ROM is available on the MRAID port. |
4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C225 M6, C245 M6, C240 M7 |
Disabled, Enabled
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PCIe Slot MSTOR Link Speed |
This option allows you to restrict the maximum speed of an MSTOR adapter. |
4.2(1) |
C225 M6 and C245 M6 |
Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4
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PCIe Slot MSTOR RAID OptionROM |
Whether the server can use the Option ROMs present in the PCIe MSTOR RAID. |
4.2(1) |
C225 M6 and C245 M6, C220 M7, C240 M7 |
Disabled, Enabled, Legacy only, UEFI only
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NVME n Link Speed where n ranges from 0-6 and 13-24. |
This option allows you to restrict the maximum speed of an NVME card installed in the PCIe slot. |
4.0(2), 4.0(4), 4.1(1), 4.2(1), 4.3(2) |
C220 M5, C240 M5, C225 M6, C245 M6
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Disabled, Auto, GEN1, GEN2, GEN3, GEN4, GEN5
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NVME n OptionROM where n ranges from 0-6. |
This options allows you to control the Option ROM execution of the PCIe adapter connected to the SSD:NVMe slot n. |
4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C225 M6, C245 M6 |
Enabled, Disabled
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PCIe Slot n Link Speed where n ranges from 1 to 12 . |
Link speed for PCIe Slot designated by slot n. |
4.0(1), 4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C480 M5, C125 M5, C225 M6, C245 M6, C220 M7, C240 M7(Slots 4–8) |
Disabled, Auto, GEN1, GEN2, GEN3, GEN4, GEN5 GEN5 is supported only for speeds 1 to 6.
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Slot n State where n ranges from 1 to 14. |
The state of the adapter card installed in PCIe slot n. |
4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C480 M5 ML, C220 M6, C240 M6, B200 M6 |
Disabled, Enabled, Legacy only, UEFI only
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C220 M6, C240 M6, B200 M6 supports Slot 9 State only. |
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PCIe Slot:FLOM Link Speed |
To configure link speed for PCIe Slot:FLOM. |
4.0 (1), 4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C225 M6, C245 M6 |
Disabled, Auto, GEN1, GEN2, GEN3
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Front NVME n Link Speed where n ranges from 1 to 12. |
This option allows you to restrict the maximum speed of an NVME card installed in the front PCIe slot. |
4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C225 M6, C245 M6, C220 M7, C240 M7 (Slots 11–24) |
Disabled, Auto, GEN1, GEN2, GEN3, GEN4, GEN5
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Front NVME n OptionROM where n ranges from 1 to 24. |
This options allows you to control the Option ROM execution of the PCIe adapter connected to the SSD:NVMe slot n. |
4.2(1) |
C225 M6, C245 M6, C220 M7, C240 M7(Slots 11–24) |
Enabled, Disabled
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Front 1 and 2 Link Speed |
This options allows you to control the link speed execution of the front PCIe adapter connected to the slot 1 and 2. |
4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C225 M6, C245 M6 |
Disabled, Auto, GEN1, GEN2, GEN3, GEN4
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PCIe Slot:HBA Link Speed |
This option allows you to restrict the maximum speed of an HBA card. |
4.2(1) |
C225 M6, C245 M6 |
Disabled, Auto, GEN1, GEN2, GEN3, GEN4
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PCIe Slot:HBA OptionROM |
This option allows you to configure the option ROM execution of an HBA card. |
4.2(1) |
C225 M6, C245 M6 |
Disabled, Enabled, Legacy only, UEFI only
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GPU n OptionROM where n ranges from 1 to 8. |
Whether the Option ROM is enabled on GPU slot n. |
4.0(4), 4.1(1) |
C480 M5 ML |
Enabled, Disabled
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PCIe LOM:1 and 2 Link |
This option allows you to restrict the maximum speed of an adapter card installed in PCIe slot 1 and 2. |
4.0 (1), 4.0(2), 4.0(4), 4.1(1) |
All M5 servers |
Enabled, Disabled
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Slot Mezz State |
This option allows you to configure the Mezz state for PCIe slot. |
4.0 (1), 4.0(2), 4.1(1) |
All M5 servers |
Disabled, Enabled, Legacy only, UEFI only
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PCIe Slot:MLOM Link Speed |
This option allows you to restrict the maximum speed of an MLOM adapter. |
4.0 (1), 4.0(2), 4.0(4), 4.1(1) |
C220 M5, C240 M5, C480 M5, C125 M5, C220 M6, C240 M6, C220 M7, C240 M7 |
Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5
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PCIe Slot:MLOM OptionROM |
Whether Option ROM is available on the MLOM port. |
4.0 (1), 4.0(2), 4.0(4), 4.1(1), 5.0(1), 5.0(2) |
C220 M5, C240 M5, C480 M5, C125 M5, B200 M6, C220 M6, C240 M6, C220 M7, C240 M7 |
Disabled, Enabled, Legacy only, UEFI only
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MRAID Link Speed |
This option allows you to restrict the maximum speed of MRAID. |
4.0(2), 4.0(4), 4.1(1), 4.2(1) |
C220 M5, C240 M5, C220 M6, C240 M6, C225 M6, C220 M7 |
Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5
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PCIe Slot:MRAID OptionROM |
Whether Option ROM is available on the MLOM port. |
4.0(2), 4.0(4), 4.1(1) |
C220 M5, C240 M5, C480 M5, C125 M5, C220 M6, C225 M6, C220 M7 |
Disabled, Enabled, Legacy only, UEFI only
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PCIe Slot NnOptionROM , where n ranges from 1 to 24. |
Whether Option ROM is available on the port. |
4.0(2), 4.0(4), 4.1(1) |
C220 M5, C240 M5, C480 M5, C125 M5, C220 M6, C240 M6, C220 M7, C240 M7 (Slots 4–8) |
Disabled, Enabled, Legacy only, UEFI only
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RAID Link Speed |
This option allows you to restrict the maximum speed of RAID. |
4.0 (1), 4.0(4), 4.1(1), |
C480 M5 |
Disabled, Auto, GEN1, GEN2, GEN3
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PCIe Slot RAID OptionROM |
Whether Option ROM is available on the RAID slot or not. |
4.0 (1), 4.0(4), 4.1(1), |
C480 M5 |
Enabled, Disabled
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Rear NVME n Link Speed, where n ranges from 1 to 4. |
This option allows you to restrict the maximum speed of rear NVME. |
4.0(4), 4.0 (1), 4.2(1) |
C240 M5, C240 M6, C245 M6, C220 M7, C240 M7
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Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5
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Rear NVME n OptionROM, where n ranges from 1 to 8. |
Whether Option ROM is available on the rear NVME or not. |
4.0(4), 4.0 (1), 4.2(1) |
C240 M5, C240 M6, C245 M6, C220 M7, C240 M7 |
Enabled, Disabled
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PCIe Slot:Riser Link Speedn, where n is 1 and 2. |
This option allows you to restrict the maximum speed of Riser. |
4.0(4), 4.0 (1), 4.2(1) |
C220 M5, C240 M5, C480 M5, C125 M5, |
Disabled, Auto, GEN1, GEN2, GEN3
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PCIe Slot:Riser nSlotx Link Speed, where n is 1 and 2 and x is from 1 to 6. |
This option allows you to restrict the maximum speed of Riser in the x slot . |
4.0(2), 4.0(4), 4.1(1) |
C220 M5, C240 M5, C480 M5, C125 M5, |
Disabled, Auto, GEN1, GEN2, GEN3
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PCIe Slot:SAS OptionROM |
Whether Option ROM is available on SAS slot or not. |
4.0(2), 4.0(4), 4.1(1) |
C220 M5, C240 M5, C480 M5, C125 M5 |
Disabled, Enabled, Legacy only, UEFI only
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PCIe Slot:FrontSSD nLink Speed, where n is 1 and 2. |
This option allows you to restrict the maximum speed of Front SSD. |
4.0(2), 4.0(4), 4.1(1) |
C220 M5, C240 M5, C480 M5, C125 M5 |
Disabled, Auto, GEN1, GEN2, GEN3
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