AvailableBlackwell2025

HGX B300

8-GPU HGX server board with Blackwell Ultra GPUs. The successor to HGX B200 with higher memory and performance.

Technical Specifications

Architecture
Blackwell Ultra
Release Year
2025
Process Node
TSMC 4NP
Form Factor
HGX (8-GPU server board)
VRAM
1,536 GB HBM3e (192 GB per GPU × 8)
Memory Bandwidth
8.0 TB/s per GPU
Interconnect
NVLink 5 (1.8 TB/s), NVSwitch
FP16 Performance
14.4 PFLOPS (8-GPU)
TDP
1,200W per GPU
Transistors
208 billion

Best Use Cases

  • Large-scale AI training
  • LLM training (70B-405B+)
  • HPC

Quick Facts

FamilyBlackwell
ArchitectureBlackwell Ultra
Released2025
ProcessTSMC 4NP
Form FactorHGX (8-GPU server board)

Related Blackwell GPUs

HGX B300 — Frequently Asked Questions

What is the HGX B300 GPU used for?

The HGX B300 is best suited for: Large-scale AI training, LLM training (70B-405B+), HPC.

How much VRAM does the HGX B300 have?

The HGX B300 has 1,536 GB HBM3e (192 GB per GPU × 8) of VRAM.

What is the memory bandwidth of the HGX B300?

The HGX B300 has a memory bandwidth of 8.0 TB/s per GPU.

What interconnect does the HGX B300 use?

The HGX B300 uses NVLink 5 (1.8 TB/s), NVSwitch.

When was the HGX B300 released?

The HGX B300 was released in 2025.