HGX

HGX is NVIDIA's GPU baseboard platform, a reference design that server makers build into their own rack servers rather than a finished system NVIDIA sells directly. It carries 4 or 8 SXM-form-factor GPUs wired together over NVLink and NVSwitch on one board. Dell, Lenovo, Supermicro, and ASUS each pair that board with their own CPU, storage, and chassis choices.

The HGX B200 baseboard holds 8 Blackwell GPUs, each with 180 GB of HBM3e, for 1,440 GB of GPU memory on one board. Fifth-generation NVLink connects them at 1.8 TB/s bidirectional per GPU. Smaller designs use a 4-GPU baseboard for lower cost or lower power builds. NVLink and NVSwitch let every GPU on the board address the others' memory directly, instead of routing traffic through the host CPU and PCIe.

A quote naming HGX B200 or HGX B300 is describing the GPU baseboard inside an OEM's server, not a standalone NVIDIA product. Compare those quotes on the CPU, storage, cooling, and networking the OEM wrapped around the same board.

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Last verified August 29, 2026.