Trusted Platform Module Replacement#

Caution

Static Sensitive Devices: Be sure to observe best practices for electrostatic discharge (ESD) protection. Ensure that personnel and equipment are connected to a common ground, such as wearing a wrist strap connected to the chassis ground and placing components on static-free work surfaces.

Trusted Platform Module Replacement Overview#

This is a high-level overview of the procedure to replace the trusted platform module (TPM) on the NVIDIA DGX™ B200 system.

  1. If enabled, disable drive encryption.

  2. Shut down the system.

  3. Label all motherboard tray cables and unplug them.

  4. Slide out the motherboard tray.

  5. Remove the tray lid and the DIMM air baffle.

  6. Lift the OSFP carrier module to access the TPM.

  7. Replace the TPM on the motherboard.

  8. Install the OSFP carrier module.

  9. Install the DIMM air baffle and motherboard tray lid.

  10. Slide the motherboard tray into the system.

  11. Plug in all cables using the labels as a reference.

  12. Power on the system.

  13. Confirm the system is healthy by running nvsm show health.

  14. If the data drives need to be protected, enable encryption.

Prepare the System for Replacement#

  1. Obtain a new TPM from NVIDIA.

  2. If data drives are encrypted, the tpm2 OS package is installed, and the TPM is enabled in SBIOS, disable encryption:

    sudo nv-disk-encrypt disable

  3. Shut down the system.

  4. Label all network, monitor, and USB cables

  5. Remove the motherboard tray. Refer to Motherboard Tray - Removal and Installation for more information.

  6. Remove the DIMM air baffle.

    _images/dgx-b200-case-rear.png

Replace the TPM Module#

  1. Locate the OSFP carrier module on the motherboard, as indicated by the green arrow in the following figure:

    _images/dgx-h100-osfp-carrier-pin.png

  2. Move the OSFP carrier module toward the DIMMs, as shown in the following figure.

    Ensure the OSFP cages at the rear of the system do not interfere with the tray sheet metal before you tilt the carrier:

    _images/dgx-h100-osfp-carrier-remove-move.png

  3. Rotate the OSFP carrier module to access the TPM, as shown in the following diagram:

    _images/dgx-h100-osfp-carrier-remove-tilt.png

  4. Replace the TPM. Ensure that you position the TPM in the same direction as the original.

    _images/dgx-h100-osfp-carrier-replace-tpm.png

Install the OSFP Carrier Module#

  1. Rotate the OSFP carrier module to return it to its original position. While you rotate the module, pull the module toward the DIMMs so that the ports do not interfere with the motherboard tray frame:

    _images/dgx-h100-osfp-carrier-install-tilt.png

  2. Move the OSFP carrier toward the outside of the tray so that the OSFP cages go through the openings on the sheet metal:

    _images/dgx-h100-osfp-carrier-install-move.png

Finalize the TPM Replacement#

  1. Install the air baffles, close the motherboard, and install the tray in the chassis. Refer to Motherboard Tray - Removal and Installation for more information.

  2. Plug in all cables.

  3. Install all power cords.

  4. Power on the system.

  5. If data drives were encrypted, the tpm2 OS package was installed, and the TPM was enabled in SBIOS before the replacement, enable encryption:

    sudo nv-disk-encrypt init -g -r -k <your vault password>

  6. Use the nvsm command to confirm the system is healthy:

    sudo nvsm show health
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