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Can Ryzen AI Max+ 395 128GB run Laguna S 2.1?

AMD · 96 GB LPDDR5X · 215 GB/s bandwidth · Poolside · 118.0B (active 8.0B) · MoE · model ctx up to 1024K

✅ Yes — Ryzen AI Max+ 395 128GB (96 GB) can run Laguna S 2.1 at Q4 (8K)
VRAM: 67.4 GB needed of 96 GB
Speed: ~25.4 tok/s (estimated)
TT · Tight FitComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
ROCM
Tight fit — try smaller model or shorter contextTight fit — try smaller model or shorter contextTight fit — try smaller model or shorter context
Estimates from memory-bandwidth formula; rows marked "measured" override. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K66.65 GBTight25.4 ± est.
Q48K default67.4 GBTight25.4 ± est.
Q432K71.9 GBTight25.4 ± est.
FP164K237.75 GBNo1.2 ± est.
FP168K default238.5 GBNo1.2 ± est.
FP1632K243.0 GBNo1.2 ± 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
Q464.9 GB1.5 GB1 GB67.4 GB96 GB
FP16236.0 GB1.5 GB1 GB238.5 GB96 GB

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