Question 1

Can RTX PRO 4000 Blackwell 24GB run Qwen2.5 1.5B Instruct?

Accepted Answer

Yes, RTX PRO 4000 Blackwell 24GB can run Qwen2.5 1.5B Instruct with a C grade (Runs well). Expected decode speed: 483.8 tok/s.

Question 2

How much VRAM does Qwen2.5 1.5B Instruct need?

Accepted Answer

Qwen2.5 1.5B Instruct (1.5B parameters) requires approximately 5.3 GB of memory with Q4_K_M quantization.

Question 3

What is the best quantization for Qwen2.5 1.5B Instruct?

Accepted Answer

The recommended quantization for Qwen2.5 1.5B Instruct is Q4_K_M, which balances quality and memory efficiency.

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	564.5 tok/s	499 ms	144K
Chat	C	Runs well	564.5 tok/s	350 ms	36K
Coding	C	Runs well	483.8 tok/s	400 ms	72K
RAG	C	Runs well	564.5 tok/s	624 ms	144K
Reasoning	C	Runs well	564.5 tok/s	405 ms	72K

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	0.6 GB	Low	D30
Q3_K_S	3	0.7 GB	Low	D30
NVFP4	4

Can RTX PRO 4000 Blackwell 24GB run Qwen2.5 1.5B Instruct?

Memory breakdown