Skip to main content

Install the system board

Use this information to install the system board.

About this task

  • Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

  • Turn off the corresponding DWC tray that you are going to perform the task on.

  • Disconnect all external cables from the enclosure.

  • Use extra force to disconnect QSFP cables if they are connected to the solution.

  • To avoid damaging the water loop, always use the water loop carrier when removing, installing or folding the water loop.


Ensure you have SD650 V3 Neptune DWC Waterloop Service Kit in hand to install components.

Prepare the following screwdrivers to ensure you can install and remove corresponding screws properly.
Screwdriver TypeScrew Type
Torx T10 head screwdriverTorx T10 screw
Torx T30 head screwdriverTorx T30 screw
Phillips #1 head screwdriverPhillips #1 screw
Phillips #2 head screwdriverPhillips #2 screw
Firmware and driver download: You might need to update the firmware or driver after replacing a component.
Gap pad/putty pad replacement guidelines
  • To identify the gap pad/putty pad location and orientation, see Gap pad/Putty pad identification and location.

  • Before replacing the gap pad/putty pad, gently clean the interface plate or the hardware surface with an alcohol cleaning pad.

  • Hold the gap pad/putty pad carefully to avoid deformation. Make sure no screw hole or opening is blocked by the gap pad/putty pad material.

  • The putty pad is unfit for use if the expiry date on its packaging has passed. Acquire a new putty pad for proper putty pad replacement procedure.

Watch the procedure
  • A video of this procedure is available at YouTube.


Depending on the model, your solution might look slightly different from the illustration.

  1. Install the system board.
    1. Carefully hold the front guide pin and tilt the system board at an angle.
    2. Align the connectors with the corresponding holes on the front of the node; then, gently slide the system board forward.
    3. Orient the system board on the two guide pins near the rear of the node to insure proper alignment; then, carefully insert the system board into the node.
    Avoid touching the connectors on the system board. Be careful not to damage any surrounding components inside the node.
    Figure 1. System board installation
    System board installation
  2. Install and tighten seven Phillips #1 screws per node on the system board (with a torque screwdriver set to the proper torque).
    Figure 2. System board screws installation
    System board screws installation
    For reference, the torque required for the screws to be fully tightened/removed is 0.5-0.6 newton-meters, 4.5-5.5 inch-pounds.
  3. Check the gap pads on both sides of the VR water loop trough, if any of them are damaged or missing, replace them with the new ones.
    Figure 3. VR water loop trough gap pads
    VR water loop trough gap pads

Make sure to follow Gap pad/putty pad replacement guidelines.

  1. Align the VR water loop trough with the holes on the system board; then, fasten the two Torx T10 screws (per node).
    Figure 4. VR water loop trough installation
    VR water loop trough installation
After you finish
  1. Install the power distribution board. See Install the power distribution board.

  2. Install the water loop. See Install the water loop.

  3. Install the memory modules. See Install a memory module.

  4. Install the DIMM comb. See Install a DIMM comb.

  5. Install the M.2 backplane assembly. See Install the M.2 backplane assembly.

  6. Install the drive cage. See Install a drive cage assembly.

  7. Install the PCIe riser assembly. See Install a PCIe riser assembly (ConnectX-6) , PCIe riser assembly replacement (ConnectX-7 NDR 200), or Install a PCIe riser assembly (ConnectX-7 NDR 400).

  8. Install the cross braces. See Install the cross braces.

  9. Install the tray cover. See Install the tray cover.

  10. Install the tray into the enclosure. See Install a DWC tray in the enclosure.

  11. Connect all required external cables to the solution.
    Use extra force to connect QSFP cables to the solution.
  12. Check the power LED on each node to make sure it changes from fast blink to slow blink to indicate all nodes are ready to be powered on.

  13. Update the vital product data (VPD). See Update the Vital Product Data (VPD).

    Machine type number and serial number can be found on the ID label, see Identify the solution and access the Lenovo XClarity Controller.

  14. Enable TPM/TCM. See Enable TPM.

  15. If hiding TPM or updating TPM firmware is needed, see Hide TPM or Update the TPM firmware.

  16. Optionally, enable UEFI Secure Boot. See Enable UEFI Secure Boot.