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Can MI300X 192GB run Mistral-Medium-3.5-128B?

AMD · 192 GB HBM3 · 5300 GB/s bandwidth · Mistral · 128.0B · model ctx up to 256K

Yes — the MI300X 192GB (192 GB HBM3) can run Mistral-Medium-3.5-128B. At Q4 with the default 8K context it needs ≈ 97.0 GB VRAM (weights 70.4 GB + KV cache 25.6 GB + 1 GB runtime overhead), which fits within 192 GB. Decode at Q4/8K: ≈ 26.3 tok/s (estimated, batch 1). FP16 needs ≈ 282.6 GB — does not fit on this card. Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K84.2 GBYes26.3 est.
Q48K default97.0 GBYes26.3 est.
Q432K173.8 GBYes26.3 est.
FP164K269.8 GBNo10.5 est.
FP168K default282.6 GBNo9.6 est.
FP1632K359.4 GBNo5.9 est.

Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s means the model is far beyond this card (offload-only territory).

VRAM breakdown at 8K context

QuantWeightsKV cacheOverheadTotal neededMI300X 192GB VRAM
Q470.4 GB25.6 GB1 GB97.0 GB192 GB
FP16256.0 GB25.6 GB1 GB282.6 GB192 GB

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