Can I Run Granite 4.2 30B on NVIDIA GeForce RTX 4070?
作者： Jakub Rusinowski · 最后更新： 2026年9月11日
No. Granite 4.2 30B needs 20.7 GB at 8K context (18.1 GB weights + 2.6 GB KV cache/overhead) at Q4_K_M and the NVIDIA GeForce RTX 4070 has only 12 GB. No quantization we publish closes a gap that size.
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The numbers
| Model | Granite 4.2 30B |
| Parameters | 30B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 20.7 GB |
| NVIDIA GeForce RTX 4070 VRAM | 12 GB |
| Verdict | Does not fit |
Granite 4.2 30B on the NVIDIA GeForce RTX 4070: VRAM by quantization
| Quant | VRAM needed | Fits 12 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 | ✗ No | — | — |
| Q2_K | 12.4 GB | ✗ No | — | — |
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 12 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 GeForce RTX 4070: 8K 20.7 GB ✗ · 32K 26 GB ✗ · 128K 47.4 GB ✗. Past 8K it no longer fits 12 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Either step down to a smaller size in this family, or move to a NVIDIA GeForce RTX 5090 Laptop GPU (24 GB), the card with the least memory we track that holds it.
No compatible GPU? Granite 4.2 30B on 32 GB of system RAM, CPU only: runs comfortably.
Granite 4.2 30B needs ~21 GB but this GPU has 12 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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Other IBM Granite 4.2 sizes on the NVIDIA GeForce RTX 4070
- Granite 4.2 8B — runs (6.8 GB)
- Granite 4.2 3B — runs (3.5 GB)
Granite 4.2 30B on nearby hardware
- Intel Arc B570 (10 GB) — does not fit
- AMD Radeon RX 7900 XT (20 GB) — runs at a lower quant
All IBM Granite 4.2 sizes on the NVIDIA GeForce RTX 4070 | Granite 4.2 30B model page | NVIDIA GeForce RTX 4070 GPU page | VRAM calculator | Check your hardware