HGX and DGX
HGX is NVIDIA's baseboard combining 4 or 8 SXM GPUs for server makers; DGX is the complete server sold by NVIDIA.
HGX and DGX are two NVIDIA names you come across as soon as AI servers are mentioned. HGX refers to a platform: a baseboard that holds 4 or 8 GPUs in SXM form factor, already connected to each other by NVLink, and by NVSwitch chips on the 8-GPU versions. NVIDIA supplies it to server manufacturers, who build the rest of the machine around it: processors, memory, storage, networking and power supply.
DGX is the complete system under the NVIDIA brand, sold ready to use with its own software and support. Inside an 8-GPU DGX you find the same HGX baseboard. Since 2025 the DGX range has also included desktop machines aimed at developers. The platform name follows that of the GPUs: HGX H200, HGX B200, DGX B300, and so on.
With identical GPUs, an HGX server built by a third-party manufacturer and a DGX deliver very similar computing performance. The differences lie in the choice of processors, the amount of system memory, networking, cooling options, support and price. On a product page, check the GPU model and count, the memory per GPU, the total electrical power and the chassis height, which often takes up several rack units.
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