Nemotron 3.5 Lightning 30B A3B is a 31.58B-parameter mixture-of-experts model (3B active per token). At Q4_K_M it needs about 26.0 GB of memory. The Mac Studio M5 Ultra 512GB has 384 GB usable, so it fits entirely in memory. Expect about 240 tokens/sec (204–276), with the first token after 0.3 s for a short prompt. This estimate is projected from the hardware specs; no benchmarks exist yet.
| Quantization | File size | Memory | Generation | First token | Source |
|---|---|---|---|---|---|
| Q4_K_M | 25.3 GB | Fits | 240 tok/s | 0.3 s | Projected |
| Q8_0 | 35.0 GB | Fits | 174 tok/s | 0.3 s | Projected |
| FP16 | 65.8 GB | Fits | 92 tok/s | 0.3 s | Projected |
All models on the Mac Studio M5 Ultra 512GB · Nemotron 3.5 Lightning 30B A3B on all hardware
Estimates for a short prompt on a single device. Measured numbers come from community benchmarks (r/LocalLLaMA, localscore.ai and more); others are derived from similar setups or projected from specs. Open source on GitHub.