What Is GPU Node Cabling Loom?_
Within a GPU server node, the cabling loom groups together the NVLink copper cables, power cables, and signal cables that link the GPUs to each other and to the NVSwitch or host CPU. This loom is typically assembled and routed during manufacturing or field integration to ensure clean airflow and serviceability. It reduces cable clutter and simplifies troubleshooting by keeping related cables bound together.
Technical Details
The loom includes multiple NVLink cables—each a copper twinax assembly—that run from GPU to NVSwitch or GPU to GPU within the node, as well as power cables for the GPUs and management cables for the baseboard management controller. These cables are often color-coded for correct port mapping, and the loom is secured with cable ties or Velcro straps to maintain bend radius and prevent dislodgment during shipping or vibration. The loom design must comply with the node's thermal and airflow requirements, as obstructed airflow can cause overheating of the GPUs or NVSwitch.
How Leviathan Systems Works with GPU Node Cabling Loom
During rack assembly, Leviathan field crews install the pre-assembled cabling looms into each GPU node, verifying that each cable is seated correctly and that the loom is routed to avoid pinching or sharp bends. We also inspect the loom for any signs of damage from transit and confirm that the cable labels match the node's port map before powering on the system.
Related service
GPU Rack Assembly & Rack-and-Stack →