NVLink Multicast#
NVLink multicast support requires that unified memory is enabled. For more information about enabling unified memory, refer to the Enabling Unified Memory for a vGPU documentation.
vGPU Support for NVLink Multicast#
Only full-sized, time-sliced NVIDIA vGPU for Compute support NVLink multicast.
Board |
vGPU |
|---|---|
NVIDIA HGX B300 |
NVIDIA B300X-279C |
NVIDIA HGX B200 |
NVIDIA B200X-180C |
NVIDIA HGX H800 |
NVIDIA H800XM-80C |
NVIDIA HGX H200 |
NVIDIA H200X-141C |
NVIDIA HGX H100 |
NVIDIA H100XM-80C |
NVIDIA H20 HGX 141 GB |
H20X-141C |
HGX H20 96 GB |
NVIDIA H20-96C |
Limitations#
NVLink multicast is supported only with full-sized, time-sliced NVIDIA vGPU for Compute profiles. MIG-backed vGPU profiles and fractional time-sliced profiles are not supported.
Unified memory must be enabled for the vGPU. Refer to the Enabling Unified Memory for a vGPU documentation.
NVLink multicast requires NVSwitch-connected GPU boards (HGX platforms). PCIe-only GPU configurations do not support NVLink multicast.
Only the specific board and vGPU profile combinations listed in the support table above are supported.