Remove the H100/H200 GPU complex

Follow instructions in this section to remove the H100/H200 GPU complex. The procedure must be executed by a trained technician.

About this task

S036

18 - 32 kg (39 - 70 lb)	32 - 55 kg (70 - 121 lb)

CAUTION

Use safe practices when lifting.

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.
• Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.
• Two people and one lifting device on site that can support up to 400 lb (181 kg) are required to perform this procedure. If you do not already have a lifting device available, Lenovo offers the Genie Lift GL-8 material lift that can be purchased at Data Center Solution Configurator. Make sure to include the Foot-release brake and the Load Platform when ordering the Genie Lift GL-8 material lift.

Note

Make sure you have the required tools listed below available to properly replace the component:

• Torx T10 head screwdriver
• Torx T15 head screwdriver
• Phillips #1 head screwdriver
• Phillips #2 head screwdriver
• Flat head screwdriver
• Alcohol cleaning pad
• 2 x H100/H200 PCM Kit
• 2 x SR780a V3 H100/H200 water loop putty pad kit
• SR780a V3 H100/H200 water loop service kit
• H100/H200 GPU service fixture kit
• H100/H200 NVSwitch PCM kit
• H100/H200 NVSwitch putty pad kit
• H100/H200 GPU baseboard handle kit
• Torx T25 150mm extension bit (for GPU baseboard handles)

H100/H200 water loop service kit and fixture kit are reusable and mandatory when servicing GPUs and GPU cold plate modules. It is recommended to keep them at the facility where the server operates for future replacement needs.

Note

Make sure you have the required tools listed below available to properly replace the component:

• Torque screwdriver which can be set to 0.6 newton-meters, 5.3 inch-pounds

The following illustration shows the GPU numbering and corresponding slot numbering in XCC.

Figure 1. GPU numbering

Physical GPU socket	Slot numbering in XCC	Logical number in nvidia-smi
GPU 1	Slot 21	1
GPU 2	Slot 24	2
GPU 3	Slot 22	0
GPU 4	Slot 23	3
GPU 5	Slot 17	5
GPU 6	Slot 20	6
GPU 7	Slot 18	4
GPU 8	Slot 19	7

Procedure

1. Make preparation for this task.
   1. Remove the front top cover. See Remove the front top cover.
   2. Remove the rear top cover. See Remove the rear top cover.
   3. Remove the fan cage. See Remove the fan cage (trained technician only).
   4. Remove the CPU complex. See Remove the CPU complex.
   5. Remove the power complex. See Remove the power complex.
   6. Disconnect the cables from the GPU baseboard.
   7. Disconnect and remove the cables routed through the GPU complex, if necessary. Before disconnecting the cables, make a list of each cable and record the connectors the cable is connected to. Refer to Internal cable routing.
   8. Remove the rear GPU cold plate module. See Remove the rear H100/H200 GPU cold plate module.
   9. Remove the front GPU cold plate module. See Remove the front H100/H200 GPU cold plate module.
   10. Remove the NVSwitch cold plate module or the NVSwitch and retimer cold plate module. See Remove the H100/H200 NVSwitch cold plate module.
2. Disengage the PCIe switch shuttle from the chassis.
   1. Press the two blue release latches.
   2. Rotate the two release levers until they are perpendicular to the PCIe switch shuttle.
   3. Pull the PCIe switch shuttle forward until it stops.
      Important

      Push the two release levers back until they lock into place after pulling out the PCIe switch shuttle to avoid damage.

      Figure 2. PCIe switch shuttle removal to stop position
      
      
3. Unfasten the two M3 screws to remove the GPU connector protective bracket.
   Figure 3. Removing the GPU connector protective bracket
   
   
4. Unfasten the seventeen Torx T15 captive screws on the GPU baseboard.
   Note

   Loosen or tighten the screws with a torque screwdriver set to the proper torque. For reference, the torque required for the screws to be fully loosen or tighten is 0.6±0.024 newton-meters, 5.3±0.212 inch-pounds.

   Figure 4. Screw removal
   
   
5. Remove the GPU complex.
   1. Press the button on the side of the handle.
   2. Adjust the handle to create space for screwdriver.
      Figure 5. Adjusting the handle
      
      
   3. Align the handles with the screw holes and lower them onto the GPU baseboard; then, fasten the five M3 screws (5 x M3, 0.5 newton-meters, 4.3 inch-pounds) to secure the handles to the GPU baseboard.
      Figure 6. Installing the handles
      
      
   4. Hold the two handles (1), and lift the GPU complex out of the chassis.
   Attention

   Make sure two people stand on either side of the GPU complex, and lift it by holding the two handles.

   Figure 7. Removing the GPU complex
   
   

   Note

   Keep the handles attached to the GPU complex if it is to be shipped for RMA procedure.