Can I Run Qwen 3 on AMD Radeon RX 7900 XT?
作者： Jakub Rusinowski · 最后更新： 2026年7月12日
Yes, but it's tight — Qwen 3 30B-A3B (MoE) at Q4_K_M needs 18.4 GB of the AMD Radeon RX 7900 XT's 20 GB, leaving only ~1.6 GB, ~123 tok/s (est.) with room for up to 4K context.
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AMD Radeon RX 7900 XT Specs
| VRAM | 20 GB |
| Memory Bandwidth | 800 GB/s |
Qwen 3 30B-A3B (MoE) on the AMD Radeon RX 7900 XT: VRAM by quantization
| Quant | VRAM needed | Fits 20 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 62.2 GB | ✗ No | — | — |
| Q8_0 | 33.6 GB | ✗ No | — | Build for this |
| Q6_K | 26.2 GB | ✗ No | — | — |
| Q5_K_M | 22.8 GB | ✗ No | — | — |
| Q4_K_M | 19.6 GB | ✓ Yes | 4K | Build for this |
| Q3_K_M | 14.2 GB | ✓ Yes | 32K | — |
| Q2_K | 11.2 GB | ✓ Yes | 64K | — |
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 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 GB ✗ · 32K 22.4 GB ✗ · 125K 31.8 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? Qwen 3 on 8 GB of system RAM, CPU only: runs.
Qwen 3 Sizes That Fit the AMD Radeon RX 7900 XT
| Qwen 3 30B-A3B (MoE) | Q4_K_M · 18.4 GB · ~123 tok/s (est.) |
| Qwen 3 14B | Q4_K_M · 8.9 GB · ~46 tok/s (est.) |
| Qwen 3 8B | Q4_K_M · 5 GB · ~71 tok/s (est.) |
At 2 hrs/day, buying (~$899) beats renting at $0.34/hr after about 3.7 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
Will Qwen 3 run on the AMD Radeon RX 7900 XT?
Yes, but it's tight — Qwen 3 30B-A3B (MoE) at Q4_K_M needs 18.4 GB of the AMD Radeon RX 7900 XT's 20 GB, leaving only ~1.6 GB, ~123 tok/s (est.) with room for up to 4K context.
Which Qwen 3 variant fits best on the AMD Radeon RX 7900 XT?
Qwen 3 30B-A3B (MoE) at Q4_K_M quantization (18.4 GB), estimated ~123 tokens/sec, up to 4K context.
Every Qwen 3 size on the AMD Radeon RX 7900 XT
| Size | VRAM | Verdict | Speed |
|---|---|---|---|
| Qwen 3 235B-A22B (MoE) | 141.9 GB | Does not fit | — |
| Qwen 3 32B | 19.8 GB | Runs at Q3_K_M | — |
| Qwen 3 30B-A3B (MoE) | 18.4 GB | Runs | ~123 tok/s |
| Qwen 3 14B | 8.9 GB | Runs | ~46 tok/s |
| Qwen 3 8B | 5 GB | Runs | ~71 tok/s |
Qwen 3 on Other GPUs
- Qwen 3 on NVIDIA GeForce RTX 5080
- Qwen 3 on NVIDIA GeForce RTX 5070 Ti
- Qwen 3 on NVIDIA GeForce RTX 5060 Ti 16GB
- Qwen 3 on NVIDIA GeForce RTX 4090
- Qwen 3 on NVIDIA GeForce RTX 4080 Super
Popular Models on the AMD Radeon RX 7900 XT
VRAM Tier
Troubleshooting
- Ollama: "model requires more system memory than is available"
- Which GGUF quant should I download? (Q4 vs Q5 vs Q8)
Buying Guide
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