How much VRAM does gemma 2b need?

gemma 2b (2B parameters) requires approximately 4.9 GB of memory with Q4_K_M quantization.

What is the best quantization for gemma 2b?

The recommended quantization for gemma 2b is Q4_K_M, which balances quality and memory efficiency.

Can it run?

Yes, MacBook Pro M4 16GB can run gemma 2b with a C grade (Runs well). Expected decode speed: 70.8 tok/s.

CUsable

Runs well

Using Q4_K_M in Ollama

Capabilities:

Fit status

Runs well

Decode

70.8 tok/s

TTFT

2734 ms

Safe context

37K

Memory

4.9 GB / 11.5 GB

Weights1.2 GB

KV Cache0.8 GB

Runtime1.2 GB

Headroom1.7 GB

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Runs well	70.8 tok/s	3976 ms	75K
Chat	C	Runs well	70.8 tok/s	1491 ms	19K
Coding	C	Runs well	70.8 tok/s	2734 ms	37K
RAG	C	Runs well	70.8 tok/s	4970 ms	75K
Reasoning	C	Runs well	63.9 tok/s	3579 ms	37K

How gemma 2b (2B params) fits at each quantization level on MacBook Pro M4 16GB (11.5 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	0.8 GB	Low	D31
Q3_K_S	3	1.0 GB	Low	D31
NVFP4	4

Upgrade options

MacBook Pro M3 Pro 18GBBudget pick

C89.8 tok/s decode

~$1,999 MSRP