Can I Run Qwen 3.5 4B on AMD Radeon RX 7900 XTX?
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 AMD Radeon RX 7900 XTX has 24 GB, leaving about 21.6 GB of headroom, at roughly 124 tok/s (estimated) with room for up to 128K 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 |
| AMD Radeon RX 7900 XTX VRAM | 24 GB |
| Verdict | Runs |
| Max context | 128K |
| Estimated speed | ~124 tok/s |
Qwen 3.5 4B on the AMD Radeon RX 7900 XTX: VRAM by quantization
| Quant | VRAM needed | Fits 24 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 9.3 GB | ✓ Yes | 32K | — |
| 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 24 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 XTX: 8K 4.1 GB · 32K 6.8 GB. Every window this model publishes still fits 24 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 (~$999) beats renting at $0.34/hr after about 4.1 years.
Affiliate links — we may earn a commission if you sign up, at no extra cost to you.
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 AMD Radeon RX 7900 XTX
- 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 — runs (21.1 GB)
- Qwen 3.5 27B — runs (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
- AMD Radeon RX 7900 XT (20 GB) — runs
- NVIDIA GeForce RTX 5090 (32 GB) — runs
All Qwen 3.5 sizes on the AMD Radeon RX 7900 XTX | Qwen 3.5 4B model page | AMD Radeon RX 7900 XTX GPU page | Check your hardware