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Install a ConnectX-7 NDR 400 adapter riser assembly

Use this information to install a ConnectX-7 NDR 400 adapter riser assembly.

About this task

Required tools

  • ConnectX-7 400 interface plate pad

  • ConnectX-7 400 Mylar

  • ConnectX-7 400 putty pad for water loop

  • 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

Note

SC777 V4 system uses cabled-riser cage, which means that the cable is soldered to the riser card. There are two types of cabled-riser cages, one with 390 mm cable, the other with 490 mm cable. When installing ConnectX-7 200 or ConnectX-7 400 in PCIe slot 1, make sure to use the cabled-riser cage with 490 mm cable.

  1. 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 bottom side of the interface plate.
      Figure 1. Cleaning the thermal grease from the bottom side of the interface plate

    2. Apply the thermal grease to the bottom side of the interface plate. Use a syringe to form two dots that each consists of about 0.2 ml of thermal grease, and one dot consists of about 0.1 ml of thermal grease. Follow the illustration below for thermal grease dots placement.
      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 four 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-7 NDR 400 riser assembly interface plate installation
      Interface plate installation
  2. 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-7 NDR 400 riser assembly interface plate putty pad

  3. (Optional, only for ConnectX-7 NDR 400 installed in slot 4, 5, or 6) Align the two holes on the Mylar with the two studs on the interface plate; then, install the Mylar to the interface plate.
    Figure 5. Installing Mylar to the interface plate

  4. (Optional, only for ConnectX-7 NDR 400 installed in slot 4, 5, or 6) View the tray from the front. Keep the short-side of the putty pad tight against the interface plate; keep the long-side edge aligned with the right-side edge of the interface plate; Then, attach the putty pad to the water loop.
    Figure 6. Installing putty pad to the water loop

    Figure 7. Mylar and putty pad placement for ConnectX-7 NDR 400 interface plate in slot 4, 5, and 6

  5. Install the ConnectX-7 NDR 400 riser assembly.
    1. Install the ConnectX-7 riser assembly to the water loop.
    2. Install three T10 screws to screw holes marked with A on the riser cage.
    3. Fasten the PH1 captive screw to secure the riser assembly to the water loop.
    Note

    • ConnectX-7 NDR 400 adapter screw holes are marked as A.

    • 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 8. Screw holes marked with A on riser cage

    Figure 9. Installing ConnectX-7 NDR 400 riser assembly

After you finish

  1. Complete cable routing. See Internal cable routing.

  2. Install the cross bar. See Install the cross bar.

  3. Install the tray cover. See Install the tray cover.

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

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

  6. 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.