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Can MI300X 192GB run gemma-3-27b-it?

AMD · 192 GB HBM3 · 5300 GB/s bandwidth · Google · 27.4B · model ctx up to 128K

Yes — the MI300X 192GB (192 GB HBM3) can run gemma-3-27b-it. At Q4 with the default 8K context it needs ≈ 21.51 GB VRAM (weights 15.07 GB + KV cache 5.44 GB + 1 GB runtime overhead), which fits within 192 GB. Decode at Q4/8K: ≈ 124.0 tok/s (estimated, batch 1). FP16 (≈ 61.24 GB) also fits, at ≈ 34.1 tok/s (estimated). 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)
Q44K18.79 GBYes124.0 est.
Q48K default21.51 GBYes124.0 est.
Q432K37.83 GBYes124.0 est.
FP164K58.52 GBYes34.1 est.
FP168K default61.24 GBYes34.1 est.
FP1632K77.56 GBYes34.1 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
Q415.07 GB5.44 GB1 GB21.51 GB192 GB
FP1654.8 GB5.44 GB1 GB61.24 GB192 GB

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