Can I Run Nemotron 70B on AMD Radeon RX 7900 XT?
Written by Jakub Rusinowski · Last updated July 12, 2026
No — Nemotron 70B Instruct at Q4_K_M needs 46.1 GB at 8K context (42.6 GB weights + 3.5 GB KV cache/overhead), and the AMD Radeon RX 7900 XT's 20 GB leaves it ~26.1 GB short. The cheapest card that runs it is the NVIDIA RTX 6000 Ada Generation (48 GB).
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AMD Radeon RX 7900 XT Specs
| VRAM | 20 GB |
| Memory Bandwidth | 800 GB/s |
Nemotron 70B Instruct on the AMD Radeon RX 7900 XT: VRAM by quantization
| Quant | VRAM needed | Fits 20 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 144.7 GB | ✗ No | — | — |
| Q8_0 | 78.5 GB | ✗ No | — | — |
| Q6_K | 61.4 GB | ✗ No | — | — |
| Q5_K_M | 53.5 GB | ✗ No | — | — |
| Q4_K_M | 46.1 GB | ✗ No | — | — |
| Q3_K_M | 33.6 GB | ✗ No | — | — |
| Q2_K | 26.7 GB | ✗ No | — | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 20 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 AMD Radeon RX 7900 XT: 8K 46.1 GB ✗ · 32K 54.2 GB ✗ · 125K 85.4 GB ✗. Past 8K it no longer fits 20 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Nemotron 70B Instruct on 256 GB of system RAM, CPU only: runs, but too slowly to be worth it.
Why It Does Not Fit
Every Nemotron 70B variant requires more VRAM than the AMD Radeon RX 7900 XT provides (20 GB).
Nearest GPU That Fits
NVIDIA RTX 6000 Ada Generation (48 GB VRAM).
Nemotron 70B needs ~46 GB but this GPU has 20 GB. Rent a A100 (80 GB)-class GPU by the hour instead of buying one:
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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
Will Nemotron 70B run on the AMD Radeon RX 7900 XT?
No — Nemotron 70B Instruct at Q4_K_M needs 46.1 GB at 8K context (42.6 GB weights + 3.5 GB KV cache/overhead), and the AMD Radeon RX 7900 XT's 20 GB leaves it ~26.1 GB short. The cheapest card that runs it is the NVIDIA RTX 6000 Ada Generation (48 GB).
What GPU should I get instead to run Nemotron 70B?
The NVIDIA RTX 6000 Ada Generation (48 GB VRAM) is the cheapest upgrade that fits it.
Nemotron 70B on Other GPUs
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VRAM Tier
Troubleshooting
- Ollama: "model requires more system memory than is available"
- Which GGUF quant should I download? (Q4 vs Q5 vs Q8)
Buying Guide
← Can I Run It? | Nemotron 70B Model Page | AMD Radeon RX 7900 XT GPU Page | VRAM calculator | Check Your Hardware