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
18.0 GB
No
3.6±est.
Q4
8K default
18.21 GB
No
3.5±est.
Q4
32K
19.43 GB
No
3.1±est.
FP16
4K
61.2 GB
No
—
FP16
8K default
61.41 GB
No
—
FP16
32K
62.62 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
16.8 GB
0.41 GB
0.5 GB
18.21 GB
8 GB
FP16
60.0 GB
0.41 GB
0.5 GB
61.41 GB
8 GB
Other GPUs that run Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16