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Pyyan / Compare / MI400 vs B300 Blackwell Ultra vs B200

MI400 vs B300 Blackwell Ultra vs B200

3 of 5

GPU & AI Chips · verified 13 Aug 2026

×MI400AMDcurrent
×B300 Blackwell UltraNVIDIAcurrent
×B200NVIDIAcurrent
2 slots left
SpecificationMI400B300 Blackwell UltraB200
SummaryDouble NVIDIA's memory capacity.15 PFLOPS dense FP4.The current volume Blackwell part.
Memory432GB HBM4288GB HBM3e192GB HBM3e
Bandwidth19.6 TB/s8 TB/s—
Price—~$40–50K (verify)$30–50K
VendorAMDNVIDIANVIDIA
CategoryGPU & AI ChipsGPU & AI ChipsGPU & AI Chips
OfficialAMD ↗NVIDIA ↗NVIDIA ↗

Highlighted rows are where these differ.

MI400

  • 19.6 TB/s bandwidth
  • 40 PFLOPS FP4
  • $7.2B in commitments

Best for large-model inference.

Full spec sheet →

B300 Blackwell Ultra

  • 8 TB/s memory bandwidth
  • Per-GPU pricing widely misquoted — one source cites rack pricing

Best for frontier training.

Full spec sheet →

B200

  • Sold out through mid-2026
  • ~3.6M unit backlog

Best for general training.

Full spec sheet →