Install a PCIe switch board heat sink

Follow instructions in this section to install a PCIe switch board heat sink. The procedure must be executed by a trained technician.

Procedure

1. Apply a blob of new thermal grease (0.3 ml) onto the center of the heat spreader.
   Figure 1. Thermal grease application
   
   
2. Install the PCIe switch board heat sink.
   1. Align the heat sink with the four screw holes on the PCIe switch board; then, gently place the heat sink onto the PCIe switch board.
   2. Follow the screw sequence specified on the heat-sink label, and turn the four screws clockwise a few turns until the screw threads engage in the PCIe switch board.
   3. Follow the screw sequence specified on the heat-sink label, and fully tighten the four screws to secure the heat sink.
   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 0.9 newton-meters, 8 inch-pounds.

   Figure 2. PCIe switch board heat sink installation
   
   
3. If necessary, reinstall the following components.
   1. Reinstall the M.2 drive cage. See Install the M.2 drive cage and backplane
   2. Reinstall all the hot-swap M.2 drive assemblies. See Install a hot-swap M.2 drive assembly
   3. Reinstall the integrated diagnostics panel cage.
      1. Insert the cage into its slot at the front of the NVMe drive and PCIe switch board cage.
      2. Tighten the six screws to secure the cage.
      Note

      Follow below torque values to tighten the screws with a torque screwdriver set to the proper torque.

      • Two side screws (M3 × 4 mm): 0.9 ± 0.2 newton-meters
      • Four front screws (M3 × 5 mm): 0.5 ± 0.05 newton-meters
      Figure 3. Integrated diagnostics panel cage installation
      
      
4. If necessary, reinstall the following components.
   1. Reinstall the system I/O tray.
      1. Lower the tray and slide it forward to engage it with the NVMe drive and PCIe switch board cage.
      2. Tighten the ten screws to secure the tray.
         Note

         Follow below torque values to tighten the screws with a torque screwdriver set to the proper torque.

         • Four side and top screws (M3 × 4 mm): 0.9 ± 0.2 newton-meters
         • Six front screws (M3 × 5 mm): 0.5 ± 0.05 newton-meters
         Figure 4. System I/O tray installation
         
         
   2. Reinstall the OCP module. See Install the OCP module.