Best GPU for Qwen3-Next-80B-A3B Locally
Real-time prices and hardware recommendations updated for August 2026.
Qwen3-Next-80B-A3B is a mixture-of-experts model: all 80B parameters must sit in VRAM, but only 3B activate per token — so it generates far faster than a dense model of the same size, while still demanding the memory of one.
To run Qwen3-Next-80B-A3B locally you need roughly 46.4 GB of VRAM at Q4_K_M quantization with a 32k token context. The best-value card that fits is the RTX PRO 6000 Blackwell (96 GB), which should generate around 323 tokens per second.
Adjust Context Length
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Recommended Hardware
Q3 weights are ~35GB, so a single 48GB workstation card is the entry point. Only 3B parameters activate per token, so decode stays fast despite the 80B total.
Q4 weights are ~46GB and fit a single 48GB card with room for context. With just 3B active parameters, generation is far faster than the 80B total suggests.
Recommended Hardware
Q8_0 needs ~92GB of VRAM. The RTX PRO 6000 Blackwell (96GB) is the single-GPU option; otherwise use a multi-GPU setup or Apple Silicon with unified memory.
Other models with the same VRAM requirement
Because Qwen3-Next-80B-A3B's weights fit a 48 GB card, other models of a similar size run on the same GPU. Generation speed varies — mixture-of-experts models are faster, dense models slower — but any of these load in the same VRAM:
Optimizing Setup for Qwen3-Next-80B-A3B
Quantization Recommendations
For daily coding and reasoning tasks, Q4_K_M (4-bit quantization) offers the best balance of quality and memory efficiency — it reduces memory requirements by over 70% with minimal quality loss compared to FP16. Q8 and higher presets preserve more fidelity at the cost of significantly higher VRAM usage, which may force layer offloading and hurt throughput.
Recommended Local Software
We recommend using Ollama as the primary runner for local inference due to its automated GPU model splitting and context cache optimizations. For advanced fine-tuning or quantization splits, llama.cpp with Flash Attention compiled natively provides the best granular control.
Running Qwen3-Next-80B-A3B locally — FAQ
How much VRAM do I need to run Qwen3-Next-80B-A3B?
At a 32k context with KV cache quantization on, Qwen3-Next-80B-A3B needs about 46.4 GB of VRAM at Q4_K_M — the quantization most people should use. Dropping to Q3_K_M brings that down to roughly 34.9 GB at some quality cost, while Q8_0 needs about 92.4 GB for the best quality this model can give.
What size graphics card does Qwen3-Next-80B-A3B fit on?
Qwen3-Next-80B-A3B needs about 46.4 GB at Q4_K_M, which is more than a single 24 GB consumer card provides. You need a workstation card, a multi-GPU setup, or a more aggressive quantization — otherwise layers spill into system RAM and generation slows dramatically.
Which quantization should I use for Qwen3-Next-80B-A3B?
Use Q4_K_M unless you have VRAM to spare. It needs about 46.4 GB and loses very little quality against full precision. Q8_0 needs about 92.4 GB for a quality gain most people cannot detect in everyday coding and chat. Spend spare VRAM on a longer context instead.
How does context length affect the VRAM Qwen3-Next-80B-A3B needs?
Model weights are fixed, but the KV cache grows linearly with context. For Qwen3-Next-80B-A3B at a 32k context the cache is about 0.4 GB; doubling to 64k takes it to roughly 0.8 GB. Turning KV cache quantization off doubles those figures again.
Why is Qwen3-Next-80B-A3B faster than its parameter count suggests?
Qwen3-Next-80B-A3B is a mixture-of-experts model. Its 80B parameters all have to be held in VRAM, but only 3B are used to produce each token. Generation speed is bound by streaming those 3B active parameters, so it feels much closer to a 3B model than a 80B one — while still needing memory for the full 80B.
Can the same GPU run other models similar to Qwen3-Next-80B-A3B?
Yes. Qwen3-Next-80B-A3B needs about 46.4 GB at Q4_K_M, and any model whose weights fit the same card runs on it — including Phi-3.5-MoE (60.8B). The weights fit the same GPU; generation speed varies (mixture-of-experts models are faster, dense models slower).
▸How token speeds are estimated
Two metrics are shown per GPU: Read tok/s (how fast the model ingests your prompt) and Decode tok/s (how fast it streams tokens back). They model fundamentally different bottlenecks.
Read (Prefill)
The prompt is processed in one parallel pass. This is compute-bound: it saturates the GPU's tensor cores.
Decode (Generation)
Each new token requires loading the entire model's active weights from VRAM. This is memory-bandwidth-bound: the GPU stalls waiting for data, not computing.
Weights = (activeParams × bits ÷ 8) × 1.15 overhead. KV cache per step = activeParams × multiplier × contextK.
Architecture utilization factors
Left: decode factor — Right: read factor
Data sources
TFLOPS and memory bandwidth are read from the GPU database. When missing, bandwidth falls back to a hardcoded dictionary.
Limitations
These are analytical estimates, not benchmark results. Use them as a relative comparison, not an absolute performance guarantee.