Radeon RX 7900 XTX
AMD
CompatibleRuns Qwen3 30B-A3B Q4_K_M entirely in memory
Model · Alibaba Qwen
Qwen3 30B-A3B: VRAM and hardware requirements
At Q4_K_M with an 8K context, Qwen3 30B-A3B needs about 19.9 GB: a GPU with 24 GB or more runs it entirely in VRAM.
- Parameters30.5B
- Active3.3B
- Max context128K
- LicenseApache-2.0
Specifications
- Organization
- Alibaba Qwen
- Architecture
- qwen3_moe
- Released
- April 2025
- Layers
- 48
- Hidden size
- 2048
- Attention heads
- 32
- KV heads
- 4
- Head dimension
- 128
- Vocabulary
- 151,936
- KV cache per 1K tokens (f16)
- 0.094 GB
- Repository
- Qwen/Qwen3-30B-A3B
Official specData updated 24 days agoSource: Hugging Face config.json + model card
Quantizations and memory
| Quantization | File size | Memory needed | Minimum GPU memory | Quality |
|---|---|---|---|---|
| BF16 | 56.9 GB | ~61.2 GB | 80 GB | Reference (unquantized) |
| Q8_0 | 30.3 GB | ~33.3 GB | 48 GB | Near-lossless |
| Q6_K | 23.4 GB | ~26.1 GB | 32 GB | Near-lossless |
| Q5_K_M | 20.2 GB | ~22.8 GB | 24 GB | Very good |
| Q4_K_MMost used | 17.3 GB | ~19.9 GB | 24 GB | Good — the usual choice |
| IQ4_XS | 15.3 GB | ~18.2 GB | 20 GB | Good — the usual choice |
| Q3_K_M | 13.1 GB | ~16.5 GB | 16 GB | Noticeable loss |
| Q2_K | 10.2 GB | ~13.4 GB | 16 GB | Significant loss |
File sizes: not available until imported from the model repository. Memory = weights (estimated from bits per weight) + KV cache + runtime overhead + safety margin. (BF16 ≈ 16 bpw, Q8_0 ≈ 8.5 bpw, Q6_K ≈ 6.57 bpw, Q5_K_M ≈ 5.7 bpw, Q4_K_M ≈ 4.9 bpw, IQ4_XS ≈ 4.46 bpw, Q3_K_M ≈ 4 bpw, Q2_K ≈ 3.17 bpw)
Q4, Q5 or Q8: how to choose a quantization
GPUs that run Qwen3 30B-A3B
| RTX 509032 GB · 64 GB RAM~19.7 GB · 156–284 tok/s estimate | Excellent |
|---|---|
| RTX 409024 GB · 64 GB RAM~19.7 GB · 125–209 tok/s estimate | Excellent |
| RTX 309024 GB · 64 GB RAM~19.7 GB · 120–200 tok/s estimate | Excellent |
| RX 7900 XTX24 GB · 64 GB RAM~19.8 GB · 81–149 tok/s estimate | Compatible |
| RTX 5060 Ti 16 GB16 GB · 64 GB RAM~19.7 GB · 25–49 tok/s estimate | CPU/GPU offload |
| RTX 5070 Ti16 GB · 64 GB RAM~19.7 GB · 28–56 tok/s estimate | CPU/GPU offload |
| RTX 508016 GB · 64 GB RAM~19.7 GB · 28–57 tok/s estimate | CPU/GPU offload |
| RTX 4060 Ti 16 GB16 GB · 64 GB RAM~19.7 GB · 23–43 tok/s estimate | CPU/GPU offload |
| RTX 4070 Ti SUPER16 GB · 64 GB RAM~19.7 GB · 27–54 tok/s estimate | CPU/GPU offload |
| RX 9070 XT16 GB · 64 GB RAM~19.8 GB · 23–48 tok/s estimate | CPU/GPU offload |
| RTX 3060 12 GB12 GB · 64 GB RAM~19.7 GB · 16–31 tok/s estimate | CPU/GPU offload |
| RTX 407012 GB · 64 GB RAM~19.7 GB · 17–32 tok/s estimate | CPU/GPU offload |
| RTX 507012 GB · 64 GB RAM~19.7 GB · 17–33 tok/s estimate | CPU/GPU offload |
| RTX 40608 GB · 64 GB RAM~19.7 GB · 12–23 tok/s estimate | Possible but slow |
Macs that run Qwen3 30B-A3B
| M3 Ultra (80-core GPU) · 512 GBMac Studio~19.5 GB · 61–112 tok/s estimate | Excellent |
|---|---|
| M4 Max (40-core GPU) · 128 GBMacBook Pro 14, MacBook Pro 16~19.5 GB · 53–93 tok/s estimate | Excellent |
| M3 Max (40-core GPU) · 128 GBMacBook Pro 14, MacBook Pro 16~19.5 GB · 46–78 tok/s estimate | Excellent |
| M4 Pro (20-core GPU) · 64 GBMac mini, MacBook Pro 14~19.5 GB · 38–62 tok/s estimate | Excellent |
| M4 Max (32-core GPU) · 36 GBMacBook Pro 14, MacBook Pro 16~19.5 GB · 47–79 tok/s estimate | Excellent |
| M4 · 32 GBMacBook Air, MacBook Pro 14~19.5 GB · 22–33 tok/s estimate | Compatible |
| M5 · 32 GBMacBook Pro 14~19.5 GB · 26–40 tok/s estimate | Compatible |
| M3 · 24 GBMacBook Air, MacBook Pro 14~19.5 GB · No data | Incompatible |
EstimateData updated 24 days agoSource: Run LLM Locally engine
Limits in plain words
Qwen3 30B-A3B is a mixture-of-experts model: all 30.5B parameters must be in memory, but only 3.3B are read per token, so it generates much faster than a dense model of the same size.
The KV cache grows with context: at 32K it adds about 3 GB on top of the weights.
With under 8 GB of VRAM, use a smaller quantization or a smaller model of the same family.
Where to buy
Prices and links follow the market you choose.
AMD Ryzen AI Max+ 395
Unified memory PC
ExcellentRuns Qwen3 30B-A3B Q4_K_M entirely in memory
GeForce RTX 2080 Ti
Lowest memory tier
CompatibleRuns Qwen3 30B-A3B Q4_K_M entirely in memory
No current offer imported for this market: the link opens a marketplace search.
Frequently asked questions
How much VRAM does Qwen3 30B-A3B need?
About 19.9 GB at Q4_K_M with an 8K context, including the KV cache and runtime overhead. At Q8_0 it needs about 33.3 GB. A longer context adds more: about 3 GB of KV cache at 32K.
Can Qwen3 30B-A3B run on a Mac?
Yes on a Mac whose GPU can use at least 19.5 GB, e.g. M4 32 GB. macOS lets the GPU use about two thirds to three quarters of unified memory by default.
How fast is Qwen3 30B-A3B?
On a RTX 4090, we estimate 125–209 tok/s at Q4_K_M. This is an estimate from memory bandwidth (confidence low) until benchmarks are imported.