Can I Run Llama 3.1 Family on NVIDIA GeForce RTX 4070?
作者： Jakub Rusinowski · 最后更新： 2026年7月12日
Yes, comfortably — you'll have ~7.2 GB of headroom running Llama 3.1 8B Instruct at Q4_K_M (4.8 GB, ~73 tok/s (est.)) with room for up to 32K context.
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NVIDIA GeForce RTX 4070 Specs
| VRAM | 12 GB |
| Memory Bandwidth | 504 GB/s |
Llama 3.1 8B Instruct on the NVIDIA GeForce RTX 4070: VRAM by quantization
| Quant | VRAM needed | Fits 12 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 17.3 GB | ✗ No | — | — |
| Q8_0 | 9.8 GB | ✓ Yes | 16K | — |
| Q6_K | 7.9 GB | ✓ Yes | 32K | — |
| Q5_K_M | 7 GB | ✓ Yes | 32K | — |
| Q4_K_M | 6.2 GB | ✓ Yes | 32K | — |
| Q3_K_M | 4.7 GB | ✓ Yes | 32K | — |
| Q2_K | 4 GB | ✓ Yes | 32K | — |
Assumes a 4K-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 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 6.7 GB · 32K 9.9 GB · 128K 22.8 GB ✗. Past 128K it no longer fits 12 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Llama 3.1 8B Instruct on 8 GB of system RAM, CPU only: runs.
Llama 3.1 Family Sizes That Fit the NVIDIA GeForce RTX 4070
| Llama 3.1 8B Instruct | Q4_K_M · 4.8 GB · ~73 tok/s (est.) |
At 2 hrs/day, buying (~$599) beats renting at $0.34/hr after about 2.4 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 GeForce RTX 4070 have enough VRAM for Llama 3.1 Family?
Yes, comfortably — you'll have ~7.2 GB of headroom running Llama 3.1 8B Instruct at Q4_K_M (4.8 GB, ~73 tok/s (est.)) with room for up to 32K context.
Which quantization of Llama 3.1 Family should I use on the NVIDIA GeForce RTX 4070?
Llama 3.1 8B Instruct at Q4_K_M quantization (4.8 GB), estimated ~73 tokens/sec, up to 32K context.
Llama 3.1 Family on Other GPUs
- Llama 3.1 Family on NVIDIA GeForce RTX 5070
- Llama 3.1 Family on NVIDIA GeForce RTX 4070 Ti
- Llama 3.1 Family on NVIDIA GeForce RTX 4070 Super
- Llama 3.1 Family on NVIDIA GeForce RTX 3060 (12GB)
- Llama 3.1 Family on Intel Arc B580
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VRAM Tier
Troubleshooting
Buying Guide
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