AvailableBlackwell • 2025
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.