Can I Run Qwen 3.5 4B on NVIDIA GeForce RTX 4070 Ti?
作者： Jakub Rusinowski · 最后更新： 2026年9月19日
Yes. Qwen 3.5 4B needs 2.4 GB at Q4_K_M and the NVIDIA GeForce RTX 4070 Ti has 12 GB, leaving about 9.6 GB of headroom, at roughly 119 tok/s (estimated) with room for up to 64K of context.
See what else this hardware can run →
The numbers
| Model | Qwen 3.5 4B |
| Parameters | 4B |
| Quantization | Q4_K_M |
| VRAM needed | 2.4 GB |
| NVIDIA GeForce RTX 4070 Ti VRAM | 12 GB |
| Verdict | Runs |
| Max context | 64K |
| Estimated speed | ~119 tok/s |
Qwen 3.5 4B on the NVIDIA GeForce RTX 4070 Ti: VRAM by quantization
| Quant | VRAM needed | Fits 12 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 9.3 GB | ✓ Yes | 16K | — |
| Q8_0 | 5.5 GB | ✓ Yes | 32K | — |
| Q6_K | 4.5 GB | ✓ Yes | 32K | — |
| Q5_K_M | 4.1 GB | ✓ Yes | 32K | — |
| Q4_K_M | 3.7 GB | ✓ Yes | 32K | — |
| Q3_K_M | 3 GB | ✓ Yes | 32K | — |
| Q2_K | 2.6 GB | ✓ Yes | 32K | — |
Assumes a 4K-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 Ti: 8K 4.1 GB · 32K 6.8 GB. Every window this model publishes still fits 12 GB.
What to do next
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
No compatible GPU? Qwen 3.5 4B on 8 GB of system RAM, CPU only: runs, but it is tight.
Running Qwen 3.5 4B on this card:
At 2 hrs/day, buying (~$799) beats renting at $0.34/hr after about 3.3 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.
Other Qwen 3.5 sizes on the NVIDIA GeForce RTX 4070 Ti
- Qwen 3.5 397B-A17B — does not fit (134 GB)
- Qwen 3.5 122B-A10B — does not fit (73.7 GB)
- Qwen 3.5 35B-A3B — does not fit (21.1 GB)
- Qwen 3.5 27B — does not fit (16.3 GB)
- Qwen 3.5 9B — runs (5.4 GB)
- Qwen 3.5 2B — runs (1.2 GB)
- Qwen 3.5 0.8B — runs (0.5 GB)
Qwen 3.5 4B on nearby hardware
- Intel Arc B570 (10 GB) — runs
- AMD Radeon RX 7900 XT (20 GB) — runs
All Qwen 3.5 sizes on the NVIDIA GeForce RTX 4070 Ti | Qwen 3.5 4B model page | NVIDIA GeForce RTX 4070 Ti GPU page | Check your hardware