AMD MI400 CDNA 4 Details Leak

Summary

Detailed specifications for AMD's MI400 AI accelerator have leaked: CDNA 4 architecture, 256 GB HBM4 memory — the first production GPU to use next-gen HBM. AMD claims 2x inference throughput over MI300X across transformer models. Manufactured on TSMC N3, expected Q3 2026.

So What? — Market Impact

AMD targets the B200-B300 gap. 256 GB HBM4 offers a capacity advantage over B200's 192 GB HBM3e. Cloud providers are evaluating MI400 for cost-optimized inference tiers.

Sources

VideoCardz: "AMD MI400 specs leaked"

SemiAnalysis: "AMD's datacenter GPU strategy"

AMD MI400 CDNA 4 Details Leak — 256 GB HBM4, 2x MI300X Inference, Targeting NVIDIA's B200 Gap

AMD MI400 CDNA 4 Details Leak

Summary

So What? — Market Impact

Sources

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