Nvidia DGX H100 Service Manual

Chapter 3. Power Supply Replacement
This section describes how to replace one of the DGX H100 system power supplies (PSUs).
3.1. Power Supply Replacement Overview
This is a high-level overview of the steps needed to replace a power supply.
1. Identify the broken power supply either by the amber color LED or by the power supply number
2. Request a replacement from NVIDIA Enterprise Support.
3. Remove the locking power cord from the power supply
4. Replace the power supply
5. Install the locking power cord
6. Conrm that both LEDs light up green on the power supply
7. Make sure the BMC reports no power supply failures
8. If requested, ship back the failed unit to NVIDIA Enterprise Support using the packaging provided
3.2. Identifying the Failed Power Supply
You can identify a failed power supply using any of the following methods:
▶ Visually inspect the the LEDs on the power supplies from the rear of the system when the system
is powered on.
▶ Run the nvsm show psus command and view the command output.
▶ Access the BMC web user interface and view the sensor data.
NVIDIA Enterprise Support might ask for this or similar information to conrm the power supply needs
to be replaced.
The nvsm command output and the BMC web user interface identify each power supply as PSUx, where
x is 0 to 5. The following diagram shows the physical location of each PSU.
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Nvidia DGX H100 Specifications

General

GPU	8x NVIDIA H100 Tensor Core GPUs
GPU Memory	640 GB HBM3 (80GB per GPU)
System Memory	2 TB DDR5
Form Factor	6U rackmount
Storage	30TB NVMe SSD
Power Supply	10kW
Interconnect	NVLink 4.0