Can Qwen3.5 35B A3B run on NVIDIA H800 80GB?

YES — Runs Great

C51Usable

Estimated from fit model

Qwen3.5 35B A3B needs ~34.7 GB VRAM. NVIDIA H800 80GB has 80.0 GB. With Q4_K_M quantization, expect ~114 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: HighStack: BasicBottleneck: Balanced

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 34.7 GB, 113.8 tok/s, Runs well

34.7 GB required80.0 GB available

43% VRAM used

Fit status

Runs well

Decode

113.8 tok/s

TTFT

1701 ms

Safe context

193K

Memory

34.7 GB / 80.0 GB

Memory breakdown

Weights21.3 GB

KV Cache4.1 GB

Runtime1.2 GB

Headroom8.0 GB

See how fast it feels

See how fast it feelsQwen3.5 35B A3B on NVIDIA H800 80GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 113.8 tok/s decode · 1.7s TTFT (warm) · 285 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

No major red flags

This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs well	113.8 tok/s	928 ms	193K
Coding	C	Runs well	113.8 tok/s	1701 ms	193K
Agentic Coding	C	Runs well	113.8 tok/s	2474 ms	193K
Reasoning	C	Runs well	113.8 tok/s	2010 ms	193K
RAG	C	Runs well	113.8 tok/s	3093 ms	193K

Quantization options

How Qwen3.5 35B A3B (35B params) fits at each quantization level on NVIDIA H800 80GB (80.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	13.7 GB	Low	C41
Q3_K_S	3	17.2 GB	Low	C42
NVFP4	4	19.6 GB	Medium	C42
Q4_K_M	4	21.3 GB	Medium	C42
Q5_K_M	5	25.2 GB	High	C43
Q6_K	6	28.7 GB	High	C44
Q8_0Best for your GPU	8	37.5 GB	Very High	C46
F16	16	71.8 GB	Maximum	F0

Get started

Copy-paste commands to run Qwen3.5 35B A3B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
  --hf-repo "lmstudio-community/Qwen3.5-35B-A3B-GGUF" \
  --hf-file "Qwen3.5-35B-A3B-GGUF-Q4_K_M.gguf" \
  -c 4096 -ngl 99

Frequently asked questions

Can NVIDIA H800 80GB run Qwen3.5 35B A3B?

Yes, NVIDIA H800 80GB can run Qwen3.5 35B A3B with a C grade (Runs well). Expected decode speed: 113.8 tok/s.

How much VRAM does Qwen3.5 35B A3B need?

Qwen3.5 35B A3B (35B parameters) requires approximately 34.7 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen3.5 35B A3B?

The recommended quantization for Qwen3.5 35B A3B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen3.5 35B A3B run at on NVIDIA H800 80GB?

On NVIDIA H800 80GB, Qwen3.5 35B A3B achieves approximately 113.8 tokens per second decode speed with a time-to-first-token of 1701ms using Q4_K_M quantization.

Can NVIDIA H800 80GB run Qwen3.5 35B A3B for coding?

For coding workloads, Qwen3.5 35B A3B on NVIDIA H800 80GB receives a C grade with 113.8 tok/s and 193K context.

What context window can Qwen3.5 35B A3B use on NVIDIA H800 80GB?

On NVIDIA H800 80GB, Qwen3.5 35B A3B can safely use up to 193K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for NVIDIA H800 80GB See all hardware for Qwen3.5 35B A3B

Embed this result▼

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<iframe src="https://willitrunai.com/embed/hf-lmstudio-community--qwen3-5-35b-a3b-gguf-on-h800-80gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

113.8 tok/s

928 ms

193K

Coding

Runs well

113.8 tok/s

1701 ms

193K

Agentic Coding

Runs well

113.8 tok/s

2474 ms

193K

Reasoning

Runs well

113.8 tok/s

2010 ms

193K

RAG

Runs well

113.8 tok/s

3093 ms

193K

Quantization options

How Qwen3.5 35B A3B (35B params) fits at each quantization level on NVIDIA H800 80GB (80.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	13.7 GB	Low	C41
Q3_K_S	3	17.2 GB	Low	C42
NVFP4	4	19.6 GB	Medium	C42
Q4_K_M	4	21.3 GB	Medium	C42
Q5_K_M	5	25.2 GB	High	C43
Q6_K	6	28.7 GB	High	C44
Q8_0Best for your GPU	8	37.5 GB	Very High	C46
F16	16	71.8 GB	Maximum	F0

Frequently asked questions

Can NVIDIA H800 80GB run Qwen3.5 35B A3B?

Yes, NVIDIA H800 80GB can run Qwen3.5 35B A3B with a C grade (Runs well). Expected decode speed: 113.8 tok/s.

How much VRAM does Qwen3.5 35B A3B need?

Qwen3.5 35B A3B (35B parameters) requires approximately 34.7 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen3.5 35B A3B?

The recommended quantization for Qwen3.5 35B A3B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen3.5 35B A3B run at on NVIDIA H800 80GB?

On NVIDIA H800 80GB, Qwen3.5 35B A3B achieves approximately 113.8 tokens per second decode speed with a time-to-first-token of 1701ms using Q4_K_M quantization.

Can NVIDIA H800 80GB run Qwen3.5 35B A3B for coding?

For coding workloads, Qwen3.5 35B A3B on NVIDIA H800 80GB receives a C grade with 113.8 tok/s and 193K context.

What context window can Qwen3.5 35B A3B use on NVIDIA H800 80GB?

On NVIDIA H800 80GB, Qwen3.5 35B A3B can safely use up to 193K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.