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Can Ryzen AI Max 390 64GB run Devstral-Small-2-24B-Instruct-2512?

AMD · 48 GB LPDDR5X · 215 GB/s bandwidth · Mistral · 24.0B · model ctx up to 256K

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

Yes — the Ryzen AI Max 390 64GB (48 GB LPDDR5X) can run Devstral-Small-2-24B-Instruct-2512. At Q4 with the default 8K context it needs ≈ 19.0 GB VRAM (weights 13.2 GB + KV cache 4.8 GB + 1 GB runtime overhead), which fits within 48 GB. Decode at Q4/8K: ≈ 5.7 tok/s (estimated, batch 1). FP16 needs ≈ 53.8 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)
Q44K16.6 GBYes5.7 est.
Q48K default19.0 GBYes5.7 est.
Q432K33.4 GBYes5.7 est.
FP164K51.4 GBNo3.9 est.
FP168K default53.8 GBNo3.6 est.
FP1632K68.2 GBNo2.2 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 390 64GB VRAM
Q413.2 GB4.8 GB1 GB19.0 GB48 GB
FP1648.0 GB4.8 GB1 GB53.8 GB48 GB

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