Question 1

Can RTX 3090 Ti 24GB run Qwen3.5 9B?

Accepted Answer

Yes, RTX 3090 Ti 24GB can run Qwen3.5 9B with a C grade (Runs well). Expected decode speed: 132.2 tok/s.

Question 2

How much VRAM does Qwen3.5 9B need?

Accepted Answer

Qwen3.5 9B (9B parameters) requires approximately 10.5 GB of memory with Q4_K_M quantization.

Question 3

What is the best quantization for Qwen3.5 9B?

Accepted Answer

The recommended quantization for Qwen3.5 9B is Q4_K_M, which balances quality and memory efficiency.

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	130.4 tok/s	2160 ms	65K
Chat	C	Runs well	130.4 tok/s	810 ms	19K
Coding	C	Runs well	132.2 tok/s	1464 ms	37K
RAG	C	Runs well	130.4 tok/s	2700 ms	65K
Reasoning	C	Runs well	130.4 tok/s	1755 ms	37K

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	D33
Q3_K_S	3	4.4 GB	Low	D33
NVFP4	4

Can RTX 3090 Ti 24GB run Qwen3.5 9B?

Memory breakdown