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Install the SXM GPU board

Follow instructions in this section to install the SXM GPU board.

About this task

Attention
When the HGX A100 80GB 500W 4-GPU Board is installed and if the ambient temperature is above 30°C, the GPUs may be instructed by the system to enter an emergency power reduction state whereby GPU performance will be impacted.
Important

Removing and installing this component requires trained technicians. Do not attempt to remove or install it without proper training.

Note
Make sure you have an alcohol cleaning pad available.
Attention

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

  • A torque screwdriver is available for request if you do not have one at hand.

  • Hold the long sides of the SXM GPU board with two hands while removing the new GPU board from the package box.
    Figure 1. Removing SXM GPU board from the package box
    Removing SXM GPU board from the package box

  • Once the SXM GPU board is removed from the plastic protective bag, hold two handles with both hands to move the GPU board.

    Figure 2. Removing SXM GPU board from the package box
    Removing GPU board from the package box
Prepare the following screwdriver to ensure you can install and remove the corresponding screws properly
Table 1. Torque screwdriver type list
Torque screwdriver type listScrew type
PH 2 head screwdriver

Four Philips #2

One Phillips #2 screw (18mm)

Torx 10 screwdriverTorx T10 screw (captive screw)
The following illustration shows the GPU numbering.
Figure 3. SXM GPU Numbering

Procedure

Attention
If there is any old thermal grease on the cold plates, gently clean the top of the cold plates with an alcohol cleaning pad.

  1. Hold the SXM GPU board handles and align the SXM GPU board with the four guide pins on the GPU tray; then, gently place the SXM GPU board down into the tray.
    Figure 4. Placing the SXM GPU board into the GPU tray
    Placing the SXM GPU board into the GPU tray
    1SXM GPU board handle
  2. With a PH 2 head screwdriver, fasten the five screws that secure the SXM GPU board to the GPU tray. Then, with a Torx T10 screwdriver, fasten the two captive screws on the SXM GPU board handles. Remove the screws with a torque screwdriver sets to the proper torque. For reference, the torque required for the screws to fully tighten/removal is 0.6±0.06 newton-meter, 5±0.5 pound-inch.
    Attention
    Make sure to install the Phillips #2 screw (18mm) to the designated screw hole. See the following illustration for the screw hole location.
    Figure 5. Installing the SXM GPU board
    Installing the SXM GPU board
    1Phillips #2 screw (18mm)
    2Torx T10 screw (captive screw)
  3. Apply new thermal grease to the SXM GPU board.
    1. If there is any old thermal grease on the cold plates, gently clean the top of the cold plates with an alcohol cleaning pad.
    2. If you have cleaned the top of the GPUs with an alcohol cleaning pad, make sure to apply the new thermal grease after the alcohol has fully evaporated. Apply new thermal grease (1.5 g) to the top of each of the four GPUs.
      Figure 6. Thermal grease application
      Thermal grease application

After you finish

  1. Follow the instructions below to install the L2A.

    1. Lift up the cold plate.

      Slightly lift up the cold plate with your right hand, and hold the cold plate assembly lifting handle with your left hand from underneath the cold plate.

      Remove your right hand from the cold plate while holding the cold plate assembly lifting handle with your left hand.
      Figure 7. Lifting up the cold plate
      Lifting up the cold plate

    2. Rotate the L2A clockwise.

      Hold the bottom edge of the radiator, and hold the cold plate assembly lifting handle from underneath.

      Rotate the L2A clockwise so that the left end of the radiator is standing on the flat surface, and the cold plate assembly lifting handle is facing your left side. Move your right hand to hold the right end of the radiator which is attached with the tubes.
      Figure 8. Rotate the L2A clockwise
      Rotate the L2A clockwise

    3. Turn the L2A upside up.

      Hold the right end of the radiator which is attached with the tubes, and hold the cold plate assembly lifting handle.

      Rotate the L2A clockwise so that the upper side of the radiator and cold plate assembly lifting handle are facing up.

      Attention
      To prevent cold plate assembly thermal grease from contacting the flat surface below, lift up the cold plate assembly before installing it onto the SXM GPU board.
      Figure 9. Turning the L2A upside up
      Turning the L2A upside up

    4. Reinstall the L2A. See Install the Lenovo Neptune(TM) liquid-to-air (L2A) hybrid cooling module.

  2. Reinstall the retimer assembly. See Install the retimer assembly.

  3. Reinstall the front I/O expansion board module. See Install the front I/O expansion board module.

  4. Reinstall the network adapter. See Install a network adapter.

  5. Reinstall the 2.5-inch drive cage assembly. See Install the 2.5-inch drive cage assembly.

  6. Complete the parts replacement. See Complete the parts replacement.

Demo video

Watch the procedure on YouTube