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HardwareLadder
AI GPU ladder

NVIDIAAI GPU · SXM (HGX)

B300

NVIDIA B300 is a Blackwell Ultra data-center accelerator with 270 GB HBM3e and 7.7 TB/s of memory bandwidth.

Ladder rank
#3
AI index (H100 SXM = 100)
228.6
Series
Blackwell

Specifications

Dense throughput, no sparsity
Architecture Blackwell Ultra
Form factor SXM (HGX)
Process TSMC 4NP
FP16 / BF16 tensor (dense) 2,250 TFLOPS
FP8 tensor (dense) 4,500 TFLOPS
FP4 tensor (dense) 14,000 TFLOPS
Memory 270 GB HBM3e
Memory bandwidth 7.7 TB/s
Power 1100 W
Launch Aug 2025

AI index

Tensor × bandwidth

100 × √((2,250 ÷ 989.4) × (7.7 ÷ 3.35)) = 228.6

The AI index is the geometric mean of dense 16-bit tensor throughput and memory bandwidth, each relative to the H100 SXM. It is a spec-sheet comparison, not a measured benchmark.

Sources

2 references