Install the PCIe expansion node to a compute node

Use this information to install the PCIe expansion node to a compute node.

Before you install the PCIe expansion node to a compute node:
  1. Read the following section(s) to ensure that you work safely.
  2. Make sure the compute node configuration meets the following requirements.

    • No RAID adapter should be installed in the compute node.

    • Only four-drive backplanes are supported.

    • No more than 12 DIMMs should be installed in the compute node.

    • When two GPU adapters are installed:

      1. Two processors are required in the compute node.

      2. Four-drive NVMe backplane is not supported.

Complete the following steps to install the PCIe expansion node to a compute node.
  1. Remove the screw that secures the cable bracket to the expansion node, and remove the cable bracket.
    Figure 1. Cable bracket removal from the expansion node
    Cable bracket removal from the expansion node
  2. Pull the cables on the side of the compute node slightly to make space for the cable bracket.
    Figure 2. Pulling the cables to make space for the cable bracket
    Pulling the cables to make space for the cable bracket
  3. Align the hook on the cable bracket to the slot on the side of the compute node as illustrated, and lower it until it stops.
    Figure 3. Cable bracket installation to the compute node
    Cable bracket installation to the compute node
  4. Slide the cable bracket slightly forward, and fasten the screw to secure it to the compute node.
  5. Remove the rear cable cover (see Remove the rear cable cover).
  6. Disconnect the front riser miscellaneous cable from the front riser cage; then, loosen the two captive screws from each riser cage, and remove the riser cages from the expansion node.
    Note: If you only plan to install one adapter, remove the rear riser cage only.
    Figure 4. Disconnecting the front riser miscellaneous cable and removing riser cages from the expansion node
    Disconnecting the front riser miscellaneous cable and removing riser cages from the expansion node
  7. Connect PCIe#3-A and PCIe#4-B cable to the compute node as illustrated.
    Figure 5. Connecting PCIe#3-A and PCIe#4-B cable to the compute node
    Connecting PCIe#3-A and PCIe#4-B cable to the compute node
    Note: Keep the caps on PCIe cable connectors until connecting the cables to the compute node or to the riser assemblies.
  8. Pass the cables through the cable guide based on the following compute node configurations.

    When the compute node comes with the right KVM breakout module, pass the cables in the following order, one at a time:

    1. PCIe#3-A cable
    2. PCIe#4-B cable
    3. Long KVM signal cable
    4. SAS/SATA cable
    When the compute node comes without the right KVM breakout module, pass the cables in the following order, one at a time:
    1. PCIe#3-A cable
    2. PCIe#4-B cable
    3. SAS/SATA cable
      Note: When you install a KVM breakout module, make sure the other signal cable passes through the cable guide on the other side of the compute node (see KVM breakout module).
      Figure 6. Passing cables through the cable guide and the cable bracket
      Passing cables through the cable guide and the cable bracket
  9. Pass PCIe#3-A and PCIe#4-B cable through the cable bracket, one at a time, while paying close attention to corners and edges of the cable bracket.
  10. If other components are to be installed in the compute node, install them (see Replace components in the compute node).
    Note: For proper cooling, make sure the air baffle is installed before engaging the expansion node to the compute node (see Install the air baffle).
  11. Face the bottom of the expansion node next to the cable bracket; then, pass PCIe#3-A and PCIe#4-B cable through the underside of the expansion node as illustrated.
    Figure 7. Passing PCIe#3-A and PCIe#4-B cable through the expansion node
    Passing PCIe#3-A and PCIe#4-B cable through the underside of the expansion node
  12. Pivot the expansion node over the top of the compute node.
    Figure 8. Pivoting the expansion node over the top of the compute node
    Pivoting the expansion node over the top of the compute node
  13. Align the triangles located on the sides of both the expansion node and the compute node; then, slide the expansion node slightly forward, and secure it by tightening the two captive screws near the front of the expansion node.
    Figure 9. Engaging the expansion node to the compute node
    Engaging the expansion node to the compute node
  14. Route PCIe#1-A and PCIe#2-B cable down through the expansion node from top side, and connect them to the compute node connectors as illustrated.
    Figure 10. Connecting PCIe#1-A and PCIe#2-B cable to the compute node
    Connecting PCIe#1-A and PCIe#2-B cable to the compute node
  15. Install the adapters into the riser cages (see Install a PCIe adapter into the riser cage).
  16. Install the riser assemblies into the expansion node (see Install a PCIe riser assembly into the PCIe expansion node assembly).
  17. If only one adapter is installed in the expansion node (in the rear riser slot), make sure to remove the airflow filler from the side of the expansion node, and place it in the slot by the front riser slot.
    Figure 11. Airflow filler installation
    Airflow filler installation
  18. Install the rear cable cover (see Install the rear cable cover).

After you install the PCIe expansion node to the compute node, complete the following steps:

  1. Install the PCIe expansion node assembly into the enclosure (see Install the compute-expansion node assembly into the enclosure).

  2. Power on the compute node.