NVIDIA · 24 GB GDDR6X · 1008 GB/s bandwidth ·
Alibaba · 32.8B · model ctx up to 32K
Partly — Qwen2.5-Coder-32B-Instruct at Q4 fits the RTX 4090 24GB (24 GB GDDR6X) at 4K context (≈ 22.32 GB) but not at the default 8K (≈ 25.6 GB needed). Use a shorter context or partial offload. Decode at Q4/8K: ≈ 42.0 tok/s (measured, batch 1). FP16 needs ≈ 73.16 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
Quant
Context
VRAM needed
Fits?
tok/s (decode)
Q4
4K
22.32 GB
Yes
42.0measured
Q4
8K default
25.6 GB
No
42.0measured
Q4
32K
45.28 GB
No
42.0measured
FP16
4K
69.88 GB
No
1.8est.
FP16
8K default
73.16 GB
No
1.7est.
FP16
32K
92.84 GB
No
1.0est.
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).