How much memory does Nemotron 3 Ultra need in FP8?
Nemotron 3 Ultra has 550 billion parameters. The FP8 format decides how much memory is needed to load them.
How is this footprint calculated?
Nemotron 3 Ultra totals 550 billion parameters. The FP8 format takes 1.0 byte per parameter. The product gives the weights, to which a 15% runtime margin is added for activations and buffers. The attention cache is not included: it grows with context and concurrency.
What does the format change?
FP8 brings negligible loss on most tasks.
| Format | Weights in memory | Compatible platforms |
|---|---|---|
| FP16 | 1,265 GB | 3 |
| FP8 | 632 GB | 6 |
| NVFP4 | 316 GB | 7 |
| Q4 | 316 GB | 7 |
Which platforms qualify?
- DGX Station, 748 GB
- RTX PRO 6000 server, 768 GB
- H200 SXM server, 1,128 GB
- B200 SXM, 1,440 GB
- B300 SXM, 2,304 GB
- GB300 NVL72, 20,700 GB
See the Nemotron 3 Ultra fact sheet.
How much memory for Nemotron 3 Ultra in FP8?
About 632 GB for the weights, excluding the attention cache.
Which format should I choose for Nemotron 3 Ultra?
FP8 brings negligible loss on most tasks. The most precise format that fits the target machine remains the best choice.
Method
Parameter counts and memory figures come from the site fact sheets. Memory footprints are calculated, not measured: a reading on real hardware may differ depending on the engine and the exact weight format. Prices are indicative and not contractual.