Can I Run Nemotron 3 Nano Omni on AMD Radeon RX 7900 XT?
Written by Jakub Rusinowski · Last updated September 6, 2026
Only with offload — Nemotron 3 Nano Omni 30B-A3B at Q4_K_M needs 20.7 GB at 8K context (18.1 GB weights + 2.6 GB KV cache/overhead) against the AMD Radeon RX 7900 XT's 20 GB, so part of it spills onto CPU/system RAM and speed drops sharply.
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AMD Radeon RX 7900 XT Specs
| VRAM | 20 GB |
| Memory Bandwidth | 800 GB/s |
Nemotron 3 Nano Omni 30B-A3B on the AMD Radeon RX 7900 XT: VRAM by quantization
| Quant | VRAM needed | Fits 20 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 62.6 GB | ✗ No | — | — |
| Q8_0 | 34.5 GB | ✗ No | — | — |
| Q6_K | 27.2 GB | ✗ No | — | — |
| Q5_K_M | 23.8 GB | ✗ No | — | — |
| Q4_K_M | 20.7 GB | ✗ No | — | — |
| Q3_K_M | 15.4 GB | ✓ Yes | 16K | — |
| Q2_K | 12.4 GB | ✓ Yes | 32K | — |
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 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 20.7 GB ✗ · 32K 26 GB ✗ · 128K 47.4 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 3 Nano Omni 30B-A3B on 16 GB of system RAM, CPU only: runs, but it is tight.
Why It Does Not Fit
Every Nemotron 3 Nano Omni variant requires more VRAM than the AMD Radeon RX 7900 XT provides (20 GB).
Nearest GPU That Fits
NVIDIA GeForce RTX 5090 Laptop GPU (24 GB VRAM).
Nemotron 3 Nano Omni needs ~21 GB but this GPU has 20 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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FAQ
Will Nemotron 3 Nano Omni run on the AMD Radeon RX 7900 XT?
Only with offload — Nemotron 3 Nano Omni 30B-A3B at Q4_K_M needs 20.7 GB at 8K context (18.1 GB weights + 2.6 GB KV cache/overhead) against the AMD Radeon RX 7900 XT's 20 GB, so part of it spills onto CPU/system RAM and speed drops sharply.
What GPU should I get instead to run Nemotron 3 Nano Omni?
The NVIDIA GeForce RTX 5090 Laptop GPU (24 GB VRAM) is the cheapest upgrade that fits it.
Nemotron 3 Nano Omni on Other GPUs
- Nemotron 3 Nano Omni on NVIDIA GeForce RTX 5080
- Nemotron 3 Nano Omni on NVIDIA GeForce RTX 5070 Ti
- Nemotron 3 Nano Omni on NVIDIA GeForce RTX 5060 Ti 16GB
- Nemotron 3 Nano Omni on NVIDIA GeForce RTX 4090
- Nemotron 3 Nano Omni on NVIDIA GeForce RTX 4080 Super
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VRAM Tier
Troubleshooting
- Ollama: "model requires more system memory than is available"
- Out of memory at long context (the KV cache, not the weights)
Buying Guide
← Can I Run It? | Nemotron 3 Nano Omni Model Page | AMD Radeon RX 7900 XT GPU Page | VRAM calculator | Check Your Hardware