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Can MI300X 192GB run Laguna S 2.1?

AMD · 192 GB HBM3 · 5300 GB/s bandwidth · Poolside · 118.0B (active 8.0B) · MoE · model ctx up to 1024K

✅ Yes — MI300X 192GB (192 GB) can run Laguna S 2.1 at Q4 (8K)
VRAM: 67.4 GB needed of 192 GB
Speed: ~625.5 tok/s (estimated)
SS · ExcellentComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
ROCM
Excellent for 💬 chatExcellent for ⌨️ codingExcellent for 📋 general
Estimates from memory-bandwidth formula; rows marked "measured" override. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K66.65 GBYes625.5 ± est.
Q48K default67.4 GBYes625.5 ± est.
Q432K71.9 GBYes625.5 ± est.
FP164K237.75 GBNo216.0 ± est.
FP168K default238.5 GBNo214.6 ± est.
FP1632K243.0 GBNo206.7 ± 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
Q464.9 GB1.5 GB1 GB67.4 GB192 GB
FP16236.0 GB1.5 GB1 GB238.5 GB192 GB

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