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Install a ConnectX-8 XDR adapter riser assembly

Use this information to install a ConnectX-8 XDR adapter riser assembly.

About this task

Required tools

  • ConnectX-8 XDR interface plate pads

  • Thermal grease

Important
Gap pad, putty pad, and PCM replacement guidelines

  • For gap pad, putty pad, and PCM locations and instruction, see Gap pad, putty pad, and PCM identification and location.

  • Before replacing the gap pad, putty pad, or PCM, gently clean the surface with an alcohol cleaning pad.

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

Attention

  • 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.

Procedure

  1. Make preparations for this task.
    1. Remove the tray cover. See Remove the tray cover.
    2. Remove the cross bar. See Remove the cross bar.
  2. If the interface plate was removed, install the interface plate to the water loop.
    1. With an alcohol cleaning pad, gently clean off the thermal grease from the top side and bottom side of the interface plate.
      Figure 1. Cleaning the thermal grease from the top side and bottom side of the interface plate

    2. Apply the thermal grease to the top side and bottom side of the interface plate. Follow the illustration below for thermal grease dots placement.

      • Top side: Use a syringe to form four uniformly spaced thermal grease dots, while each dot consists of about 0.1 ml of thermal grease.

      • Bottom side: Use a syringe to form four dots that each consists of 0.2 ml of thermal grease, and one dot that consists of 0.3 ml of thermal grease.

      Figure 2. Thermal grease dots placement on the interface plate

    3. Align the interface plate with the screw holes on the water loop; then, place it on the water loop.
    4. Install five (5x) PH1 screws to secure the interface plate to the water loop..
      Note

      For reference, the torque required for the screws to be fully tightened/removed is 5.0+/- 0.5 in-lbs, 0.55+/- 0.056 N-m.

      Figure 3. ConnectX-8 XDR riser assembly interface plate installation
      Interface plate installation
  3. With an alcohol cleaning pad, gently clean the putty pads from the interface plate. Then, attach the putty pad to the interface plate. Make sure to follow Gap pad/putty pad replacement guidelines.
    Figure 4. ConnectX-8 XDR riser assembly interface plate putty pad

  4. Install the ConnectX-8 XDR riser assembly.
    1. Install the ConnectX-8 riser assembly to the water loop.
    2. Install six (6x) T6 screws to screw holes marked with C on the riser cage.
      Note

      • ConnectX-8 XDR adapter screw holes are marked as C.

      • For reference, the torque required for the screws to be fully tightened/removed is 3.0+/- 0.5 in-lbs, 0.33 +/- 0.056 N-m.

      Figure 5. Screw holes marked with C on riser cage

    3. Fasten the PH1 captive screw to secure the riser assembly to the water loop.
    Figure 6. Installing ConnectX-8 XDR riser assembly

After you finish

  1. Complete cable routing. See Internal cable routing.

  2. Install the OSFP module. See Install the OSFP module.

  3. Install the cross bar. See Install the cross bar.

  4. Install the tray cover. See Install the tray cover.

  5. Install the tray into the enclosure. See Install a tray in the enclosure.

  6. Connect all required external cables to the solution.
    Note
    Use extra force to connect QSFP cables to the solution.

  7. 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.