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PCIe slots and configurations

Slot configurations​

The server supports up to 3 PCIe slots on the rear. The PCIe slot configurations vary by server model.

Note
The slots defined in the UEFI setting are slightly different from the physical slots. For information about slots defined in the UEFI setting, refer to:
ModelsConfigurations

3 PCIe slots(no rear bays)

  • Slot 1: PCIe x16 (x8, x4, x1), low-profile

  • Slot 2: PCIe x16 (x8, x4, x1), full-height

  • Slot 3: PCIe x16 (x8, x4, x1), low-profile

2 PCIe slots(no rear bays)

  • Slot 1: PCIe x16 (x8, x4, x1), low-profile

  • Slot 2: PCIe x16 (x8, x4, x1), full-height

Note
One rearwall bracket must be installed next to the two PCIe slots.

2 PCIe slots(7mm rear bay)

  • Slot 1: PCIe x16 (x8, x4, x1), low-profile

  • Slot 2: PCIe x16 (x8, x4, x1), low-profile

1 PCIe slot(2.5'' rear bay)

  • Slot 1: PCIe x16 (x8, x4, x1), low-profile

Quantities and slot priority​

PCIe adapters Max qty.Slot priority

GPU

Tesla T4/A2/Quadro P620

3

  • 1 CPU: slot 1---> 2

  • 2 CPU: slot 1---> 3---> 2

Quadro P2200

1

Slot 2

NIC

Intel E810-DA4

1

Slot 2

Xilinx Alveo U25

2

  • 1 CPU: slot 1

  • 2 CPU: slot 1---> 3

Note
When the Alveo U50 is installed, fan redundancy is not supported and the ambient temperature must be limited to 30°C or lower.

Xilinx Alveo U50

 

Others

3

  • 1 CPU: slot 1---> 2

  • 2 CPU: slot 1---> 3---> 2

Note
The following adapters require a full-height bracket and must be installed in a full-height slot:

  • ThinkSystem Broadcom 57454 10/25GbE SFP28 4-port PCIe Ethernet Adapter

  • ThinkSystem Broadcom 57454 10/25GbE SFP28 4-port PCIe Ethernet Adapter_Refresh (V2)

Internal SFF RAID/HBA

 

1

Slot 1

Internal CFF RAID/HBA

 

1

Front chassis

External RAID/HBA

 

3

NA

FC HBA

 

3

  • 1 CPU: slot 1---> 2

  • 2 CPU: slot 1---> 3---> 2

PCIe SSD

 

3

  • 1 CPU: slot 1---> 2

  • 2 CPU: slot 1---> 3---> 2

COM cable

 

1

Slot 3

OCP 3.0

 

1

OCP slot

RAID rules

  • Gen3 and Gen4 cannot be installed together on one riser card.

  • RAID controllers of the same PCIe generation group can be installed on one riser card.

  • RAID and HBA controllers can be installed on one riser card.

  • The RAID/HBA 4350/5350/9350 adapters cannot be mixed with the following adapters in the same system:

    • Intel E810-DA2 OCP/PCIe Ethernet adapter

    • Intel E810-DA4 OCP/PCIe Ethernet adapter

    • RAID/HBA 430/530/930 adapters

    • RAID/HBA 440/940/540 adapters, except for external RAID/HBA 440-8e/440-16e/940-8e adapters

  • PCIe SSD does not support RAID function.

  • The RAID 940-8i or RAID 940-16i adapter supports Tri-mode. When Tri-mode is enabled, the server supports SAS, SATA and U.3 NVMe drives at the same time. NVMe drives are connected via a PCIe x1 link to the controller.

    Note
    To support Tri-mode with U.3 NVMe drives, U.3 x1 mode must be enabled for the selected drive slots on the backplane through the XCC Web GUI. Otherwise, the U.3 NVMe drives cannot be detected. For more information, see U.3 NMVe drive can be detected in NVMe connection, but cannot be detected in Tri-mode.

  • The HBA 430/440 adapters do not support the Self-Encrypting Drive (SED) management feature.

  • 930/9350/940 RAID controllers require a super capacitor.

    Locations and quantities of RAID super capacitors vary by models:


    RAID super capacitor module location

     2.5'' chassis3.5'' chassisInstallation priorityLocation
     

    STD heat sink

    Perf. heat sink

    STD heat sink

    Perf. heat sink

    1

    Super cap 1

    Super cap 1

    NA

    NA

    Super cap 1---> 2--->3

    Front chassis

    2

    Super cap 2, 3

    NA

    Super cap 1, 2

    NA

    Air baffle

    3

    NA

    NA

    NA

    Super cap 1

    Riser cage