Remove a GPU

Use this information to remove a GPU.

About this task

S001

DANGER

danger

Electrical current from power, telephone, and communication cables is hazardous.

To avoid a shock hazard:

• Connect all power cords to a properly wired and grounded electrical outlet/source.
• Connect any equipment that will be attached to this product to properly wired outlets/sources.
• When possible, use one hand only to connect or disconnect signal cables.
• Never turn on any equipment when there is evidence of fire, water, or structural damage.
• The device might have more than one power cord, to remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

Attention

• Read the following sections to ensure that you work safely.

  • Installation Guidelines

  • Safety inspection checklist

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

  Note

  If Shared I/O adapters are installed, power off the auxiliary node (node 1/3/5/7/9/11) first, and then power off the primary node (node 2/4/6/8/10/12).
• Disconnect all external cables from the enclosure.

  Note

  Use extra forces 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.

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

Prepare the following screwdrivers to ensure you can install and remove corresponding screws properly.

Table 1. Torque screwdriver type list

Torque screwdriver type	Screw type
Torx T10 head screwdriver	Torx T10 screw
Phillips #1 head screwdriver or 3/16" hex head screwdriver	Phillips #1 screw
Phillips #2 head screwdriver	Phillips #2 screw

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The following illustration shows the GPU numbering.

Figure 1. GPU numbering

Procedure

1. Make preparations for this task.
   1. Remove the tray (see Remove a DWC tray from the enclosure).
      Attention

      For safety, use the lift tool to remove the tray from the rack.

   2. Remove the tray cover (see Remove the tray cover).
   3. Remove the front and the rear cross braces (11x Phillips #1 screws).
      Figure 2. Cross brace removal
      
      
   4. See Cable removal order to disconnect cables according to your configuration.
   5. Disconnect GPU power cable.
      Figure 3. GPU power cable removal
      
      
   6. Remove the clamp plate or the drive depending on your configuration.

      • Clamp plate removal: Remove the two screws to remove the clamp plate.

        Figure 4. Clamp plate removal
        
        

      • Drive removal: see Install the drive in the GPU node.

   7. Remove seven Torx T10 water loop screws with a torque screwdriver sets to the proper torque.
      Note

      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.

      Figure 5. Water loop screws removal
      
      
   8. Remove GPU cold plate screws (16x Phillips #1 screws) with a torque screwdriver sets to the proper torque.
      Note

      For reference, the torque required for the screws to be fully tightened/removed is 0.34-046 newton-meters, 3-4 inch-pounds.

      Figure 6. GPU cold plate screws removal
      
      
   9. Remove the four Torx T10 screws (per node) to loosen the quick connect.
      Figure 7. Screws removal
      
      
   10. Orient the water loop carrier with the slots; then, gently put the water loop carrier down and ensure it is seated firmly on the water loop.
       Figure 8. Water loop carrier installation
       
       
   11. Tighten water loop carrier screws (15x Phillips #2 screws).
       Figure 9. Water loop carrier screws installation
       
       
   12. Fold the water loop.

       1. ❶ Carefully unhook the quick connect and slide it out of the opening in the rear of the tray; then, lift the water loop up off the GPU board.

       2. ❷ Carefully rotate the water loop so one half is sitting on top of the other half.

       Figure 10. Folding the water loop
       
       
2. Locate the GPU which should be moved; then, remove the four Phillips #2 screws (with a torque screwdriver sets to the proper torque) and carefully remove the GPU out of the GPU board.
   Note

   For reference, the torque required for the screws to be fully tightened/removed is 0.45-0.56 newton-meters, 4-5 inch-pounds.

   Figure 11. GPU removal
   
   
3. Install protective covers to the GPU.
   Figure 12. Protective covers installation