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Can Ryzen AI Max 390 64GB run gemma-4-26B-A4B-it?

AMD · 48 GB LPDDR5X · 215 GB/s bandwidth · Google · 25.2B (active 3.8B) · MoE · model ctx up to 256K

✅ Yes — Ryzen AI Max 390 64GB (48 GB) can run gemma-4-26B-A4B-it at Q4 (8K)
VRAM: 15.42 GB needed of 48 GB
Speed: ~52.5 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)
Q44K15.27 GBYes52.5 ± est.
Q48K default15.42 GBYes52.5 ± est.
Q432K16.36 GBYes52.5 ± est.
FP164K51.56 GBNo13.8 ± est.
FP168K default51.71 GBNo13.7 ± est.
FP1632K52.65 GBNo13.2 ± 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
Q414.11 GB0.31 GB1 GB15.42 GB48 GB
FP1650.4 GB0.31 GB1 GB51.71 GB48 GB

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