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Can T4 16GB run Qwen3.5-27B?

NVIDIA · 16 GB GDDR6 · 320 GB/s bandwidth · Alibaba · 27.0B · model ctx up to 256K

No — Qwen3.5-27B at Q4 needs ≈ 18.55 GB even at 4K context, beyond the T4 16GB's 16 GB GDDR6. It would only run with heavy CPU/disk offload. Decode at Q4/8K: ≈ 12.2 tok/s (estimated, batch 1). FP16 needs ≈ 60.4 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)
Q44K18.55 GBNo16.0 est.
Q48K default21.25 GBNo12.2 est.
Q432K37.45 GBNo3.9 est.
FP164K57.7 GBNo0.5 est.
FP168K default60.4 GBNo0.4 est.
FP1632K76.6 GBNo

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 neededT4 16GB VRAM
Q414.85 GB5.4 GB1 GB21.25 GB16 GB
FP1654.0 GB5.4 GB1 GB60.4 GB16 GB

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