Question 1

Can NVIDIA H200 PCIe 141GB run Qwen3.5 4B?

Accepted Answer

Yes, NVIDIA H200 PCIe 141GB can run Qwen3.5 4B with a C grade (Runs well). Expected decode speed: 1416.4 tok/s.

Question 2

How much VRAM does Qwen3.5 4B need?

Accepted Answer

Qwen3.5 4B (4B parameters) requires approximately 18.5 GB of memory with Q4_K_M quantization.

Question 3

What is the best quantization for Qwen3.5 4B?

Accepted Answer

The recommended quantization for Qwen3.5 4B is Q4_K_M, which balances quality and memory efficiency.

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	1652.5 tok/s	350 ms	238K
Chat	C	Runs well	1652.5 tok/s	350 ms	61K
Coding	C	Runs well	1416.4 tok/s	350 ms	122K
RAG	C	Runs well	1652.5 tok/s	350 ms	238K
Reasoning	C	Runs well	1652.5 tok/s	350 ms	122K

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	1.6 GB	Low	D30
Q3_K_S	3	2.0 GB	Low	D30
NVFP4	4

Can NVIDIA H200 PCIe 141GB run Qwen3.5 4B?

Memory breakdown