Can I Run Nemotron Cascade 2 on NVIDIA H100 80GB (PCIe)?
Written by Jakub Rusinowski · Last updated September 11, 2026
Yes, comfortably — Nemotron Cascade 2 70B at Q4_K_M needs 45.4 GB at 8K context (42.3 GB weights + 3.1 GB KV cache/overhead), leaving ~34.6 GB of the NVIDIA H100 80GB (PCIe)'s 80 GB, at ~36 tok/s (est.), with room for up to 64K context.
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NVIDIA H100 80GB (PCIe) Specs
| VRAM | 80 GB |
| Memory Bandwidth | 2000 GB/s |
Nemotron Cascade 2 70B on the NVIDIA H100 80GB (PCIe): VRAM by quantization
| Quant | VRAM needed | Fits 80 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 143.2 GB | ✗ No | — | — |
| Q8_0 | 77.6 GB | ✓ Yes | 16K | — |
| Q6_K | 60.6 GB | ✓ Yes | 64K | — |
| Q5_K_M | 52.8 GB | ✓ Yes | 64K | — |
| Q4_K_M | 45.4 GB | ✓ Yes | 64K | — |
| Q3_K_M | 33 GB | ✓ Yes | 64K | — |
| Q2_K | 26.2 GB | ✓ Yes | 64K | — |
Assumes an 8K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 80 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the NVIDIA H100 80GB (PCIe): 8K 45.4 GB · 32K 52.6 GB · 125K 80.3 GB ✗. Past 125K it no longer fits 80 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Nemotron Cascade 2 on 24 GB of system RAM, CPU only: runs.
Nemotron Cascade 2 Sizes That Fit the NVIDIA H100 80GB (PCIe) (at 8K context)
| Nemotron Cascade 2 70B | Q4_K_M · 45.4 GB at 8K context · ~36 tok/s (est.) |
| Nemotron-Cascade 2 30B-A3B | Q4_K_M · 21.7 GB at 8K context · ~249 tok/s (est.) |
At 2 hrs/day, buying (~$25,000) beats renting at $0.77/hr after about 45.1 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
FAQ
Does the NVIDIA H100 80GB (PCIe) have enough VRAM for Nemotron Cascade 2?
Yes, comfortably — Nemotron Cascade 2 70B at Q4_K_M needs 45.4 GB at 8K context (42.3 GB weights + 3.1 GB KV cache/overhead), leaving ~34.6 GB of the NVIDIA H100 80GB (PCIe)'s 80 GB, at ~36 tok/s (est.), with room for up to 64K context.
Which quantization of Nemotron Cascade 2 should I use on the NVIDIA H100 80GB (PCIe)?
Nemotron Cascade 2 70B at Q4_K_M quantization needs 45.4 GB at 8K context (42.3 GB weights + 3.1 GB KV cache/overhead), estimated ~36 tokens/sec, up to 64K context.
Nemotron Cascade 2 on Other GPUs
- Nemotron Cascade 2 on NVIDIA A100 80GB (PCIe)
- Nemotron Cascade 2 on Apple M2 Max
- Nemotron Cascade 2 on Apple M1 Max
- Nemotron Cascade 2 on Apple M5 Pro
- Nemotron Cascade 2 on NVIDIA RTX PRO 6000 Blackwell
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