NVIDIA HGX B300
An HGX baseboard with eight Blackwell Ultra GPUs that system builders design into x86 servers. NVIDIA's own configuration is the DGX B300.
NVIDIA · Current generationShipping
Blackwell Ultra · 8-GPU HGX
- Memory
- 270 GB HBM3E
- Bandwidth
- 7.7 TB/s
- Server
- 8 GPUs
Specifications at a glance
As published by NVIDIA, checked 24 September 2026. Configurations vary by system builder.
- System
- 8 Blackwell Ultra SXM GPUs on one HGX baseboard, in x86 servers from system builders
- GPU memory
- 270 GB HBM3E per GPU; 2.1 TB per 8-GPU system
- Memory bandwidth
- 7.7 TB/s per GPU
- FP4 compute
- 144 PFLOPS with sparsity, 108 PFLOPS dense, per 8-GPU system
- Interconnect
- Fifth-generation NVLink: 1.8 TB/s per GPU; ConnectX-8 at 800 Gb/s per GPU
- Power
- Configurable up to 1,100 W per GPU; about 14 kW for a DGX B300 system
- Cooling
- DGX B300 is air-cooled; other HGX B300 servers follow their builder's design
- Status
- Shipping
Configuration and site considerations
HGX B300 servers vary by builder, so the server model defines the power, cooling and rack plan.
- Each server's power and cooling follow the system builder's design.
- NVIDIA's DGX B300 draws about 14 kW per system and is air-cooled.
- Document the server model, the quantity and the supplier.
Prepare this system for a financing review
Document the configuration, the supplier and the deployment so the request can be assessed against the actual equipment.**
System configuration and quantity
Supplier and purchase order
Or fleet details and ownership information for deployed servers.
Deployment site and colocation agreement
Power and cooling readiness
Customer contract or documented on-demand revenue
