GPU Aux Power Sockets in PowerEdge T550 Explained

In the Dell PowerEdge T550 server, the auxiliary power for a GPU comes from specific power connectors on the server’s motherboard and power supply unit. These connectors are designed to provide the additional power required by GPUs, especially high-performance ones, beyond what the PCIe slot itself can supply.

PowerEdge T550 GPU Auxiliary Power Connections

1. Dedicated GPU Power Cables:

• The Dell PowerEdge T550 has dedicated power cables coming from the power supply unit (PSU) to provide additional power to GPUs.
• These cables typically have connectors that match the common auxiliary power inputs on GPUs, such as 6-pin, 8-pin, or 6+2 pin PCIe power connectors.

2. Power Distribution Board (PDB):

• Some configurations of the PowerEdge T550 include a Power Distribution Board that manages power from the PSU to various components including GPUs.
• The PDB will have specific sockets for GPU power cables.

Specific Connectors for GPUs in PowerEdge T550

• 6-Pin PCIe Power Connector:
• Provides an additional 75 watts of power to the GPU.
• Often used for mid-range GPUs.
• 8-Pin PCIe Power Connector:
• Provides an additional 150 watts of power.
• Used for higher-end GPUs that require more power.
• 6+2 Pin PCIe Power Connector:
• This is a flexible connector that can function as either a 6-pin or an 8-pin power connector, depending on the GPU’s requirements.

Steps to Identify and Use GPU Power Connectors in a PowerEdge T550:

1. Access the PowerEdge T550’s Internal Components:

• Ensure the server is powered off and unplugged.
• Open the chassis to access the internal components.

2. Locate the Power Supply Unit (PSU):

• Identify the power cables coming from the PSU.
• Look for cables labeled for GPU or PCIe power.

3. Identify the Power Connectors:

• These cables will terminate in 6-pin, 8-pin, or 6+2 pin connectors.
• Ensure they match the GPU’s power requirements.

4. Connect the Power Cables to the GPU:

• Insert the appropriate power connector(s) into the GPU’s auxiliary power sockets.
• Secure any excess cables to avoid obstructing airflow or other components.

5. Check the Server Documentation:

• Refer to the Dell PowerEdge T550 documentation or service manual for detailed diagrams and instructions regarding GPU installation and power connections.

Additional Notes:

• Compatibility: Ensure the GPU is compatible with the PowerEdge T550 in terms of size, power requirements, and supported configurations.
• GPU Power Requirements: Check the GPU’s power specifications to determine how many and what type of auxiliary power connectors are needed.
• Power Supply Capacity: Verify that the PSU has sufficient capacity to support the additional power load of the GPU(s).
• Installation: When installing multiple GPUs, ensure each GPU has its dedicated power connectors from the PSU to avoid overloading a single power rail.

By following these guidelines, you can safely and effectively provide the necessary auxiliary power to GPUs in a Dell PowerEdge T550 server.