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Can Ryzen AI Max+ 395 128GB run gemma-3-27b-it?

AMD · 96 GB LPDDR5X · 215 GB/s bandwidth · google · 27.4B · model ctx up to NoneK

CC · WorkableComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
ROCM

Yes — the Ryzen AI Max+ 395 128GB (96 GB LPDDR5X) can run gemma-3-27b-it. At Q4 with the default 8K context it needs ≈ 21.55 GB VRAM (weights 15.07 GB + KV cache 5.48 GB + 1 GB runtime overhead), which fits within 96 GB. Decode at Q4/8K: ≈ 5.0 tok/s (estimated, batch 1). FP16 (≈ 61.28 GB) also fits, at ≈ 1.4 tok/s (estimated). Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology. Buy Ryzen AI Max+ 395 128GB on Amazon →

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K18.81 GBYes5.0 ± est.
Q48K default21.55 GBYes5.0 ± est.
Q432K37.99 GBYes5.0 ± est.
FP164K58.54 GBYes1.4 ± est.
FP168K default61.28 GBYes1.4 ± est.
FP1632K77.72 GBYes1.4 ± 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 neededRyzen AI Max+ 395 128GB VRAM
Q415.07 GB5.48 GB1 GB21.55 GB96 GB
FP1654.8 GB5.48 GB1 GB61.28 GB96 GB

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