The hardware calculator's newest NVIDIA rows were still 2025 parts: DGX B200, DGX Spark and the RTX 5090. NVIDIA's current Blackwell Ultra documents describe a larger GPU.
What the vendor pages state
NVIDIA's DGX B300 user guide, updated 21 October 2026, lists eight B300 GPUs, 8 × 288 GB = 2.3 TB of GPU memory, and 14.5 kW power consumption for the node. The HGX B300 component note lists 288 GB HBM3e per GPU and bandwidth up to 8 TB/s, with up to 64 TB/s aggregate on an eight-GPU node.
The calculator now has a single B300 (288 GB) row and a DGX B300 (2,304 GB) row, marked new. The 2025 cards are no longer badged as new. Usable memory is the published capacity. We do not subtract an invented operating-system reserve, and we do not claim that an API-only model runs on the box.
Vera Rubin and the RTX Spark laptops are not added. The pages we checked did not give one consistent VRAM, bandwidth and power set we were willing to store as a fitter row.