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Can RTX 3090 24GB run Nanbeige4.2-3B?

NVIDIA · 24 GB GDDR6X · 936 GB/s bandwidth · Nanbeige · 4.0B · model ctx up to 128K

✅ Yes — RTX 3090 24GB (24 GB) can run Nanbeige4.2-3B at Q4 (8K)
VRAM: 4.08 GB needed of 24 GB
Speed: ~203.5 tok/s (estimated)
SS · ExcellentComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
CUDA
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)
Q44K3.64 GBYes203.5 ± est.
Q48K default4.08 GBYes203.5 ± est.
Q432K6.7 GBYes203.5 ± est.
FP164K9.44 GBYes56.0 ± est.
FP168K default9.88 GBYes56.0 ± est.
FP1632K12.5 GBYes56.0 ± 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 neededRTX 3090 24GB VRAM
Q42.2 GB0.88 GB1 GB4.08 GB24 GB
FP168.0 GB0.88 GB1 GB9.88 GB24 GB

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