Estimates from memory-bandwidth formula; rows marked "measured" override. Methodology.
Fit & speed by quant and context
Quant
Context
VRAM needed
Fits?
tok/s (decode)
Q4
4K
270.88 GB
No
—
Q4
8K default
271.85 GB
No
—
Q4
32K
277.66 GB
No
—
FP16
4K
962.37 GB
No
—
FP16
8K default
963.34 GB
No
—
FP16
32K
969.15 GB
No
—
Fits = weights + KV(ctx) + 0.5 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
Quant
Weights
KV cache
Overhead
Total needed
MacBook Neo A18 Pro 8GB VRAM
Q4
268.91 GB
1.94 GB
0.5 GB
271.85 GB
8 GB
FP16
960.4 GB
1.94 GB
0.5 GB
963.34 GB
8 GB
Other GPUs that run Qwen3-Coder-480B-A35B-Instruct